Dermovilite exsudativa vegetante crônica em equino - relato de caso / Chronic equine proliferative pododermatitis - case report

A dermovilite exsudativa vegetante crônica (DEVC) é uma afecção que acomete os cascos de equinos, comprometendo seu bem-estar e que ainda é subdiagnosticada devido à similaridade com outras doenças. O presente trabalho relata o diagnóstico clínico da DEVC em um paciente equino atendido no Ambulatório de Grandes Animais do Hospital Veterinário da Universidade Federal Rural de Pernambuco. O paciente de doze anos de idade, 386 kg e sem raça definida apresentava histórico de crescimento irregular dos cascos, com odor fétido, presença de tecido esponjoso nas ranilhas e claudicação. Foi realizado o debridamento das lesões, antissepsia dos cascos, colocação de bandagens acolchoadas e impermeabilização, além de administração de penicilina benzatina e flunixina meglumina. Apesar das lesões patognomônicas possibilitarem o diagnóstico clínico de DEVC, ainda é necessária a ampliação dos conhecimentos a seu respeito para possibilitar a sua prevenção e diagnóstico.

Chronic equine proliferative pododermatitis is a condition that affects the horse hooves, compromising their welfare. Despite its clinical importance, it is still underdiagnosed due to its similarity to other diseases. Therefore, the present study aimed to report the clinical diagnosis of this disease in an equine patient seen at the Ambulatory of Large Animals of the Veterinary Hospital of the UFRPE. The twelve-year-old patient, 386 kg body weight and mixed-race, presented a history of hooves with irregular growth and malodorous odor, presence of spongy tissue in the frogs and lameness. Initial treatment consisted of debridement of the lesions, antisepsis of the hooves, the placement of padded bandages, waterproofing, and the administration of Benzathine penicillin and flunixin meglumine. Despite the pathognomonic lesions making possible the clinical diagnosis of this disease, it is still necessary to expand knowledge about it, for the improvement of its prevention and diagnosis

Dermovilite exsudativa vegetante crônica em equino - relato de caso / Chronic equine proliferative pododermatitis - case report

A dermovilite exsudativa vegetante crônica (DEVC) é uma afecção que acomete os cascos de equinos, comprometendo seu bem-estar e que ainda é subdiagnosticada devido à similaridade com outras doenças. O presente trabalho relata o diagnóstico clínico da DEVC em um paciente equino atendido no Ambulatório de Grandes Animais do Hospital Veterinário da Universidade Federal Rural de Pernambuco. O paciente de doze anos de idade, 386 kg e sem raça definida apresentava histórico de crescimento irregular dos cascos, com odor fétido, presença de tecido esponjoso nas ranilhas e claudicação. Foi realizado o debridamento das lesões, antissepsia dos cascos, colocação de bandagens acolchoadas e impermeabilização, além de administração de penicilina benzatina e flunixina meglumina. Apesar das lesões patognomônicas possibilitarem o diagnóstico clínico de DEVC, ainda é necessária a ampliação dos conhecimentos a seu respeito para possibilitar a sua prevenção e diagnóstico.(AU)

Chronic equine proliferative pododermatitis is a condition that affects the horse hooves, compromising their welfare. Despite its clinical importance, it is still underdiagnosed due to its similarity to other diseases. Therefore, the present study aimed to report the clinical diagnosis of this disease in an equine patient seen at the Ambulatory of Large Animals of the Veterinary Hospital of the UFRPE. The twelve-year-old patient, 386 kg body weight and mixed-race, presented a history of hooves with irregular growth and malodorous odor, presence of spongy tissue in the frogs and lameness. Initial treatment consisted of debridement of the lesions, antisepsis of the hooves, the placement of padded bandages, waterproofing, and the administration of Benzathine penicillin and flunixin meglumine. Despite the pathognomonic lesions making possible the clinical diagnosis of this disease, it is still necessary to expand knowledge about it, for the improvement of its prevention and diagnosis(AU)

Estudo epidemiológico e clínico de afecções podais em bovinos de corte manejados extensivamente no sudeste do Pará / Epidemiological and clinical study of foot diseases in beef cattle extensive management in southeastern Pará, Brazil

Foram avaliados os fatores epidemiológicos e as afecções podais de bovinos de corte no estado do Pará em 12 propriedades. Em todas foi realizado o estudo epidemiológico e em nove o estudo epidemiológico e o exame clínico dos animais. Nos centros de manejo foram observados fatores favoráveis a traumatismos nos dígitos dos bovinos, como piso das seringas calçado com pedras, troncos com exposição de ferragens e rampas dos embarcadores com pisos de pedras pontiagudas, além da falta de manutenção e erros estruturais. Em todas as fazendas observou-se um manejo inadequado dos animais. Em 91,7% das fazendas (11/12) havia piquetes com presença de troncos de árvores e 66,7% (8/12) apresentavam áreas de relevo inclinado com presença de pedras. Em 16,7% (2/12) das fazendas havia áreas de brejo com áreas alagadas. A sodomia foi relatada em todas as propriedades. Nenhuma fazenda adotava medidas profiláticas relacionadas às afecções podais. Foram examinados 498 bovinos entre fêmeas e machos. Os membros pélvicos foram mais acometidos, tanto nas fêmeas quanto nos machos. Foram diagnosticadas 629 lesões nas fêmeas, sendo as mais frequentes pododermatite séptica, deformações ungulares, pododermatite da sobreunha e dermatite digital. Nos machos diagnosticou-se 285 lesões e as mais frequentes foram pododermatite séptica, deformações ungulares e abrasão de talão. Conclui-se que erros de manejo associados às condições inadequadas das instalações foram fatores que contribuíram para a ocorrência de enfermidades podais em bovinos de corte nas fazendas estudadas; as características ambientais favoreceram o desenvolvimento das lesões; as associações de lesões foram mais prevalentes do que as simples, sendo diagnosticadas em animais em todas as fazendas estudadas; o diagnóstico precoce a campo não era realizado, o que contribuiu para aumentar a gravidade e a diversificação das afecções podais diagnosticadas.(AU)

The epidemiological study was conducted in 12 farms with the history of foot disease occurrence. Clinical examination of the affected cattle for the diagnosis of foot disease was performed only on nine of these farms. Multiple risk factors were found for digit injuries, as syringes floors paved with rocks, working chutes with iron fittings exposure, loading ramps covered with sharp stones and the lack of maintenance and structural errors. On each farm there was an inappropriate handling of cattle. On 91.7% of them (11/12) existed pickets with trunks of trees and 66.7% (8/12) had areas of sloping relief with stones. Moreover, 16.7% (2/12) of the farms were in marsh areas and wetlands. Sodomy was reported for all farms. None of them adopted preventive measures related to foot problems. A total of 498 cattle, males and females, were examined. The hind limbs were the most affected in both, females and in males. In females 629 lesions were diagnosed. The septic pododermatitis was the most common, followed by claw deformities, pododermatitis in the paradigits and digital dermatitis. In males 285 injuries were diagnosed; the most common were septic pododermatitis, claw deformities and heel erosion. It was concluded that management errors associated with inadequate facilities were factors that contributed to the occurrence of foot diseases in beef cattle of the farms studied. The environmental characteristics favored the development of lesions; combined injuries were more prevalent than the simple ones diagnosed in cattle of all farms. Early diagnosis was not carried out in the field, what helped to increase the severity and the diversification of the foot problems.(AU)

Estudo epidemiológico e clínico de afecções podais em bovinos de corte manejados extensivamente no sudeste do Pará / Epidemiological and clinical study of foot diseases in beef cattle extensive management in southeastern Pará, Brazil

Foram avaliados os fatores epidemiológicos e as afecções podais de bovinos de corte no estado do Pará em 12 propriedades. Em todas foi realizado o estudo epidemiológico e em nove o estudo epidemiológico e o exame clínico dos animais. Nos centros de manejo foram observados fatores favoráveis a traumatismos nos dígitos dos bovinos, como piso das seringas calçado com pedras, troncos com exposição de ferragens e rampas dos embarcadores com pisos de pedras pontiagudas, além da falta de manutenção e erros estruturais. Em todas as fazendas observou-se um manejo inadequado dos animais. Em 91,7% das fazendas (11/12) havia piquetes com presença de troncos de árvores e 66,7% (8/12) apresentavam áreas de relevo inclinado com presença de pedras. Em 16,7% (2/12) das fazendas havia áreas de brejo com áreas alagadas. A sodomia foi relatada em todas as propriedades. Nenhuma fazenda adotava medidas profiláticas relacionadas às afecções podais. Foram examinados 498 bovinos entre fêmeas e machos. Os membros pélvicos foram mais acometidos, tanto nas fêmeas quanto nos machos. Foram diagnosticadas 629 lesões nas fêmeas, sendo as mais frequentes pododermatite séptica, deformações ungulares, pododermatite da sobreunha e dermatite digital. Nos machos diagnosticou-se 285 lesões e as mais frequentes foram pododermatite séptica, deformações ungulares e abrasão de talão. Conclui-se que erros de manejo associados às condições inadequadas das instalações foram fatores que contribuíram para a ocorrência de enfermidades podais em bovinos de corte nas fazendas estudadas; as características ambientais favoreceram o desenvolvimento das lesões; as associações de lesões foram mais prevalentes do que as simples, sendo diagnosticadas em animais em todas as fazendas estudadas; o diagnóstico precoce a campo não era realizado, o que contribuiu para aumentar a gravidade e a diversificação das afecções podais diagnosticadas.(AU)

The epidemiological study was conducted in 12 farms with the history of foot disease occurrence. Clinical examination of the affected cattle for the diagnosis of foot disease was performed only on nine of these farms. Multiple risk factors were found for digit injuries, as syringes floors paved with rocks, working chutes with iron fittings exposure, loading ramps covered with sharp stones and the lack of maintenance and structural errors. On each farm there was an inappropriate handling of cattle. On 91.7% of them (11/12) existed pickets with trunks of trees and 66.7% (8/12) had areas of sloping relief with stones. Moreover, 16.7% (2/12) of the farms were in marsh areas and wetlands. Sodomy was reported for all farms. None of them adopted preventive measures related to foot problems. A total of 498 cattle, males and females, were examined. The hind limbs were the most affected in both, females and in males. In females 629 lesions were diagnosed. The septic pododermatitis was the most common, followed by claw deformities, pododermatitis in the paradigits and digital dermatitis. In males 285 injuries were diagnosed; the most common were septic pododermatitis, claw deformities and heel erosion. It was concluded that management errors associated with inadequate facilities were factors that contributed to the occurrence of foot diseases in beef cattle of the farms studied. The environmental characteristics favored the development of lesions; combined injuries were more prevalent than the simple ones diagnosed in cattle of all farms. Early diagnosis was not carried out in the field, what helped to increase the severity and the diversification of the foot problems.(AU)

Alterações neoplásicas e não neoplásicas das mãos e dos pés de cães (2003-2016) / Neoplastic and non-neoplastic lesions of the hands and feet of dogs (2003-2016)

Mãos e pés de cães são comumente afetados por lesões neoplásicas e não neoplásicas. Estas alterações podem apresentar prognóstico histopatológico ou clínico ruim e a amputação tende a ser o tratamento de escolha. Estudos prévios avaliando a prevalência e os aspectos clínicopatológicos de alterações digitais em cães têm sido realizados em outros países, entretanto trabalhos similares não foram realizados no Brasil. O objetivo do presente estudo foi descrever e caracterizar histologicamente as lesões das mãos e pés de cães. Amostras de 105 lesões tumoriformes das mãos e pés de cães foram avaliadas. Essas amostras foram coletadas entre 2003 e 2016 e foram obtidas de três laboratórios brasileiros de diagnóstico veterinário. Todos espécimes foram fixados em formol tamponado 10%, processados rotineiramente e corados por hematoxilina-eosina. Adicionalmente, as colorações de azul de toluidina, Brown e Breen, periodic acid Schiff (PAS), Grocott Methenamine Silver (GMS) e Ziehl Neelsen foram utilizados em casos específicos. Imuno-histoquímica foi realizada usando os anticorpos anti-Leishmania spp., anti-CD117, anti-CD79, anti-CD3, anti-Melan A, anti-lisozima, anti-Pancytokeratin AE1/AE3 e anti-vimentina. Os neoplasmas (62,9%) foram as alterações mais frequentes, seguidas por inflamações (19%) e outras alterações (18,1%). Entre os neoplasmas, 40,9% foram mesenquimais, 39,4% epiteliais e 19,7% de células redondas. Todos os neoplasmas de células redondas e a maioria dos epiteliais e mesenquimais eram malignos. Não se observou predileção de prevalência dos neoplasmas em relação ao sexo. As raças Labrador Retriever, Schnauzer, Teckel, SRD, Pastor Alemão, Rottweiler e Pit Bull foram as mais afetadas. Fila Brasileiro, Pit Bull e Schnauzer tiveram alta incidência de neoplasmas mesenquimais, epiteliais e de células redondas, respectivamente. Inflamação foi mais comumente observada em cães Labrador Retriever e as outras alterações em Teckel, Labrador Retriever e SRD. A idade e o peso médio dos animais afetados foram de 8,4 anos e 28,5 kg, respectivamente. O diâmetro médio das lesões tumoriformes foi de 2,5 cm e as lesões neoplásicas apresentaram as maiores médias. As lesões ocorreram principalmente em animais de pelagem amarela. A maioria das biópsias incisionais (56,4%) e amputações (85,3%) consistiram de neoplasmas. O principal membro afetado foi o torácico direito e o dígito foi a estrutura anatômica acometida mais frequentemente. Carcinoma de células escamosas (14,2%) foi o neoplasma mais frequente, seguido do mastocitoma (7,6%), melanoma (7,6%) e sarcoma indiferenciado (7,6%). Em metade dos casos de inflamação, a lesão acometeu o folículo piloso e derme adjacente, e o infiltrado foi predominantemente piogranulomatoso ou lnfoplasmocítico. Cistos foliculares, calcinose circunscrita e acrocordoma foram as principais lesões não neoplásicas e não inflamatórias diagnosticadas.(AU)

Hands and feet of dogs are commonly affected by neoplastic and non-neoplastic lesions. These lesions may commonly present poor clinical or histopathological prognosis and amputation tends to be the treatment of choice. Previous studies regarding the prevalence and the clinicopathological aspects of digital changes in dogs have been performed abroad, with no similar investigations in Brazil. The aim of this manuscript was to perform a histopathological study to characterize hands and feet lesions of dogs from Brazil.Tissue samples from 105 tumor-like lesions of dogs hands and feet were used in this study. The samples came from three Brazilian veterinary diagnostic laboratories and were collected between 2003 and 2016. All specimens were fixed in 10% buffered formalin, and routinely processed for paraffin embedding and hematoxylin-eosin staining. Additionally, toluidine blue, Brown and Breen, periodic acid Schiff (PAS), Grocott Methenamine Silver (GMS) and Ziehl Neelsen were used in selected cases. Immunohistochemistry using anti-Leishmania spp., anti-CD117, anti-CD79, anti-CD3, anti-Melan A, anti-lysozyme, anti-Pancytokeratin AE1/AE3, and anti-vimentin antibodies were also performed. Neoplasia (62.9%) was the most frequently found lesion, followed by inflammation (19%), and other changes (18.1%). Among the neoplasms, 40.9% were mesenchymal, 39.4% epithelial, and 19.7% round cells. All round cells and most of the epithelial and mesenchymal neoplasms were malignant. There was no difference between males and females regarding neoplasia prevalence. Labrador Retriever, Schnauzer, Teckel, mongrel, German Shepherd, Rottweiler, and Pit Bull were the most frequently affected breeds. Fila Brasileiro (aka Brazilian Mastiff), Pit Bull and Schnauzer had higher incidence of mesenchymal, epithelial, and round cells neoplasms, respectively. Inflammation was more commonly observed in the Labrador Retriever and other changes were more commonly in Teckel, Labrador Retriever, and mongrel dogs. Medium age and weight were 8.4 years and 28.5 kg, respectively. Medium diameter of the tumor-like lesions was 2.5 cm and the neoplastic lesions presented higher averages. Lesions were mainly in yellow-coated dogs. Incisional biopsy samples (56.4%) and amputations (85.3%) were mostly from neoplastic cases. Right forelimb was the most affected limb, and digits were the main injured anatomic structures. Squamous cell carcinoma was the most (14.2%) commonly diagnosed neoplasm, followed by mast cell tumor (7.6%), melanoma (7.6%), and undifferentiated sarcoma (7.6%). In half of the inflammatory cases, the lesion was centered in hair follicle and surrounding dermis. The inflammatory infiltrate was predominantly piogranulomatous or lymphoplasmacytic. Follicular cyst, calcinosis circumscripta, and acrochordons were the main non neoplastic and non-inflammatory changes.(AU)

Alterações neoplásicas e não neoplásicas das mãos e dos pés de cães (2003-2016) / Neoplastic and non-neoplastic lesions of the hands and feet of dogs (2003-2016)

Mãos e pés de cães são comumente afetados por lesões neoplásicas e não neoplásicas. Estas alterações podem apresentar prognóstico histopatológico ou clínico ruim e a amputação tende a ser o tratamento de escolha. Estudos prévios avaliando a prevalência e os aspectos clínicopatológicos de alterações digitais em cães têm sido realizados em outros países, entretanto trabalhos similares não foram realizados no Brasil. O objetivo do presente estudo foi descrever e caracterizar histologicamente as lesões das mãos e pés de cães. Amostras de 105 lesões tumoriformes das mãos e pés de cães foram avaliadas. Essas amostras foram coletadas entre 2003 e 2016 e foram obtidas de três laboratórios brasileiros de diagnóstico veterinário. Todos espécimes foram fixados em formol tamponado 10%, processados rotineiramente e corados por hematoxilina-eosina. Adicionalmente, as colorações de azul de toluidina, Brown e Breen, periodic acid Schiff (PAS), Grocott Methenamine Silver (GMS) e Ziehl Neelsen foram utilizados em casos específicos. Imuno-histoquímica foi realizada usando os anticorpos anti-Leishmania spp., anti-CD117, anti-CD79, anti-CD3, anti-Melan A, anti-lisozima, anti-Pancytokeratin AE1/AE3 e anti-vimentina. Os neoplasmas (62,9%) foram as alterações mais frequentes, seguidas por inflamações (19%) e outras alterações (18,1%). Entre os neoplasmas, 40,9% foram mesenquimais, 39,4% epiteliais e 19,7% de células redondas. Todos os neoplasmas de células redondas e a maioria dos epiteliais e mesenquimais eram malignos. Não se observou predileção de prevalência dos neoplasmas em relação ao sexo. As raças Labrador Retriever, Schnauzer, Teckel, SRD, Pastor Alemão, Rottweiler e Pit Bull foram as mais afetadas. Fila Brasileiro, Pit Bull e Schnauzer tiveram alta incidência de neoplasmas mesenquimais, epiteliais e de células redondas, respectivamente. Inflamação foi mais comumente observada em cães Labrador...(AU)

Hands and feet of dogs are commonly affected by neoplastic and non-neoplastic lesions. These lesions may commonly present poor clinical or histopathological prognosis and amputation tends to be the treatment of choice. Previous studies regarding the prevalence and the clinicopathological aspects of digital changes in dogs have been performed abroad, with no similar investigations in Brazil. The aim of this manuscript was to perform a histopathological study to characterize hands and feet lesions of dogs from Brazil.Tissue samples from 105 tumor-like lesions of dogs hands and feet were used in this study. The samples came from three Brazilian veterinary diagnostic laboratories and were collected between 2003 and 2016. All specimens were fixed in 10% buffered formalin, and routinely processed for paraffin embedding and hematoxylin-eosin staining. Additionally, toluidine blue, Brown and Breen, periodic acid Schiff (PAS), Grocott Methenamine Silver (GMS) and Ziehl Neelsen were used in selected cases. Immunohistochemistry using anti-Leishmania spp., anti-CD117, anti-CD79, anti-CD3, anti-Melan A, anti-lysozyme, anti-Pancytokeratin AE1/AE3, and anti-vimentin antibodies were also performed. Neoplasia (62.9%) was the most frequently found lesion, followed by inflammation (19%), and other changes (18.1%). Among the neoplasms, 40.9% were mesenchymal, 39.4% epithelial, and 19.7% round cells. All round cells and most of the epithelial and mesenchymal neoplasms were malignant. There was no difference between males and females regarding neoplasia prevalence. Labrador Retriever, Schnauzer, Teckel, mongrel, German Shepherd, Rottweiler, and Pit Bull were the most frequently affected breeds. Fila Brasileiro (aka Brazilian Mastiff), Pit Bull and Schnauzer had higher incidence of mesenchymal, epithelial, and round cells neoplasms, respectively. Inflammation was more commonly observed in the Labrador Retriever and other changes were more commonly in Teckel, Labrador Retriever...(AU)

Alterações neoplásicas e não neoplásicas das mãos e dos pés de cães (2003-2016)

ABSTRACT: Hands and feet of dogs are commonly affected by neoplastic and non-neoplastic lesions. These lesions may commonly present poor clinical or histopathological prognosis and amputation tends to be the treatment of choice. Previous studies regarding the prevalence and the clinicopathological aspects of digital changes in dogs have been performed abroad, with no similar investigations in Brazil. The aim of this manuscript was to perform a histopathological study to characterize hands and feet lesions of dogs from Brazil.Tissue samples from 105 tumor-like lesions of dogs hands and feet were used in this study. The samples came from three Brazilian veterinary diagnostic laboratories and were collected between 2003 and 2016. All specimens were fixed in 10% buffered formalin, and routinely processed for paraffin embedding and hematoxylin-eosin staining. Additionally, toluidine blue, Brown and Breen, periodic acid Schiff (PAS), Grocott Methenamine Silver (GMS) and Ziehl Neelsen were used in selected cases. Immunohistochemistry using anti-Leishmania spp., anti-CD117, anti-CD79, anti-CD3, anti-Melan A, anti-lysozyme, anti-Pancytokeratin AE1/AE3, and anti-vimentin antibodies were also performed. Neoplasia (62.9%) was the most frequently found lesion, followed by inflammation (19%), and other changes (18.1%). Among the neoplasms, 40.9% were mesenchymal, 39.4% epithelial, and 19.7% round cells. All round cells and most of the epithelial and mesenchymal neoplasms were malignant. There was no difference between males and females regarding neoplasia prevalence. Labrador Retriever, Schnauzer, Teckel, mongrel, German Shepherd, Rottweiler, and Pit Bull were the most frequently affected breeds. Fila Brasileiro (aka Brazilian Mastiff), Pit Bull and Schnauzer had higher incidence of mesenchymal, epithelial, and round cells neoplasms, respectively. Inflammation was more commonly observed in the Labrador Retriever and other changes were more commonly in Teckel, Labrador Retriever, and mongrel dogs. Medium age and weight were 8.4 years and 28.5 kg, respectively. Medium diameter of the tumor-like lesions was 2.5 cm and the neoplastic lesions presented higher averages. Lesions were mainly in yellow-coated dogs. Incisional biopsy samples (56.4%) and amputations (85.3%) were mostly from neoplastic cases. Right forelimb was the most affected limb, and digits were the main injured anatomic structures. Squamous cell carcinoma was the most (14.2%) commonly diagnosed neoplasm, followed by mast cell tumor (7.6%), melanoma (7.6%), and undifferentiated sarcoma (7.6%). In half of the inflammatory cases, the lesion was centered in hair follicle and surrounding dermis. The inflammatory infiltrate was predominantly piogranulomatous or lymphoplasmacytic. Follicular cyst, calcinosis circumscripta, and acrochordons were the main non neoplastic and non-inflammatory changes.

RESUMO: Mãos e pés de cães são comumente afetados por lesões neoplásicas e não neoplásicas. Estas alterações podem apresentar prognóstico histopatológico ou clínico ruim e a amputação tende a ser o tratamento de escolha. Estudos prévios avaliando a prevalência e os aspectos clínicopatológicos de alterações digitais em cães têm sido realizados em outros países, entretanto trabalhos similares não foram realizados no Brasil. O objetivo do presente estudo foi descrever e caracterizar histologicamente as lesões das mãos e pés de cães. Amostras de 105 lesões tumoriformes das mãos e pés de cães foram avaliadas. Essas amostras foram coletadas entre 2003 e 2016 e foram obtidas de três laboratórios brasileiros de diagnóstico veterinário. Todos espécimes foram fixados em formol tamponado 10%, processados rotineiramente e corados por hematoxilina-eosina. Adicionalmente, as colorações de azul de toluidina, Brown e Breen, periodic acid Schiff (PAS), Grocott Methenamine Silver (GMS) e Ziehl Neelsen foram utilizados em casos específicos. Imuno-histoquímica foi realizada usando os anticorpos anti-Leishmania spp., anti-CD117, anti-CD79, anti-CD3, anti-Melan A, anti-lisozima, anti-Pancytokeratin AE1/AE3 e anti-vimentina. Os neoplasmas (62,9%) foram as alterações mais frequentes, seguidas por inflamações (19%) e outras alterações (18,1%). Entre os neoplasmas, 40,9% foram mesenquimais, 39,4% epiteliais e 19,7% de células redondas. Todos os neoplasmas de células redondas e a maioria dos epiteliais e mesenquimais eram malignos. Não se observou predileção de prevalência dos neoplasmas em relação ao sexo. As raças Labrador Retriever, Schnauzer, Teckel, SRD, Pastor Alemão, Rottweiler e Pit Bull foram as mais afetadas. Fila Brasileiro, Pit Bull e Schnauzer tiveram alta incidência de neoplasmas mesenquimais, epiteliais e de células redondas, respectivamente. Inflamação foi mais comumente observada em cães Labrador Retriever e as outras alterações em Teckel, Labrador Retriever e SRD. A idade e o peso médio dos animais afetados foram de 8,4 anos e 28,5 kg, respectivamente. O diâmetro médio das lesões tumoriformes foi de 2,5 cm e as lesões neoplásicas apresentaram as maiores médias. As lesões ocorreram principalmente em animais de pelagem amarela. A maioria das biópsias incisionais (56,4%) e amputações (85,3%) consistiram de neoplasmas. O principal membro afetado foi o torácico direito e o dígito foi a estrutura anatômica acometida mais frequentemente. Carcinoma de células escamosas (14,2%) foi o neoplasma mais frequente, seguido do mastocitoma (7,6%), melanoma (7,6%) e sarcoma indiferenciado (7,6%). Em metade dos casos de inflamação, a lesão acometeu o folículo piloso e derme adjacente, e o infiltrado foi predominantemente piogranulomatoso ou lnfoplasmocítico. Cistos foliculares, calcinose circunscrita e acrocordoma foram as principais lesões não neoplásicas e não inflamatórias diagnosticadas.

Evaluation of Dietary Glycerin Inclusion During Different Broiler Rearing Phases

The objective of this study was to evaluate the effect of the dietary addition of different levels of glycerin on the performance, litter moisture, pododermatitis incidence, and carcass and parts yield of broilers. In total, 1,610 broilers were reared in 35 pens with 46 birds each. A completely randomized experimental design, with five treatments with seven replicates was applied. The experimental treatments were: T1: control diet; T2: dietary inclusion of 5% glycerin from 1-42 days of age; T3: dietary inclusion of 10% glycerin from 1-42 days of age; T4: dietary inclusion of 5% glycerin from 7-42 days of age; T5: dietary inclusion of 10% glycerin from 7-42 days of age. The diets containing glycerin fed since the pre-starter period improved broiler weight gain and feed conversion ratio, but did not influence feed intake or livability. At the end of the experiment, the production efficiency index of the broilers fed 10% glycerin during the entire rearing period was significantly reduced compared with the other treatments. Litter moisture in the pens of broilers fed 10% glycerin during the entire rearing period was higher compared to the other treatments since day 21.Diets containing 10% glycerin, both for the entire rearing period (1-42 days) or only after the pre-starter phase (7-42 days), influenced broiler performance and incidence of severe pododermatitis, reducing the production efficiency indexes at 42 days. Glycerin may be added up to 5% in broiler´s diets with no effect on performance, litter moisture and carcass yield, indicating that this co-product of the biodiesel industry can be used as an alternative feedstuff for broilers.(AU)

Evaluation of Dietary Glycerin Inclusion During Different Broiler Rearing Phases

The objective of this study was to evaluate the effect of the dietary addition of different levels of glycerin on the performance, litter moisture, pododermatitis incidence, and carcass and parts yield of broilers. In total, 1,610 broilers were reared in 35 pens with 46 birds each. A completely randomized experimental design, with five treatments with seven replicates was applied. The experimental treatments were: T1: control diet; T2: dietary inclusion of 5% glycerin from 1-42 days of age; T3: dietary inclusion of 10% glycerin from 1-42 days of age; T4: dietary inclusion of 5% glycerin from 7-42 days of age; T5: dietary inclusion of 10% glycerin from 7-42 days of age. The diets containing glycerin fed since the pre-starter period improved broiler weight gain and feed conversion ratio, but did not influence feed intake or livability. At the end of the experiment, the production efficiency index of the broilers fed 10% glycerin during the entire rearing period was significantly reduced compared with the other treatments. Litter moisture in the pens of broilers fed 10% glycerin during the entire rearing period was higher compared to the other treatments since day 21.Diets containing 10% glycerin, both for the entire rearing period (1-42 days) or only after the pre-starter phase (7-42 days), influenced broiler performance and incidence of severe pododermatitis, reducing the production efficiency indexes at 42 days. Glycerin may be added up to 5% in broiler´s diets with no effect on performance, litter moisture and carcass yield, indicating that this co-product of the biodiesel industry can be used as an alternative feedstuff for broilers.

Footpad dermatitis in broilers: differences between strains and gender

Pododermatitis, also known as "bumblefoot", is an inflammatory lesion of the footpad. The objective of this study was to evaluate the influence of genetic strain and sex on the incidence of footpad lesions in broilers. The experiment was carried out at São Paulo State University, using 480 broilers distributed in a completely randomized experimental design in a 2X2 factorial arrangement (2 strains X2 sexes), with four replicates of 30 broilers each, totaling 16 experimental units. Feed intake, weight gain, feed conversion ratio, and livability were evaluated at 21, 35 and 42 days of age; production efficiency factor was determined at the end of the rearing period. On day 42, the footpads of 100 broilers were grossly examined and assigned a lesion score in a 1-3 scale (Almeida Paz & Martins, 2014). Three samples per score within treatment were collected for microscopic evaluation. Analysis of variance was applied and performance parameter means were compared by Tukey's test. Footpad lesion incidence was analyzed by the c2 test using SAS (version8.2). Ross(r) broilers presented higher feed intake during all evaluated periods, and higher weight gain only in the period 1 to 21 days compared with Cobb(r) broilers. On the other hand, Cobb(r) presented better feed conversion ratio in the periods of 1 to 35 and 1 to 42 days. The incidence of foot pad lesions was statistically different (p < 0.05) between strains and sexes, but there were no interactions between these factors. The lesion scores assigned were compatible with the histopathological results, showing that the higher the score, the more severe were the dermal and epidermal lesions.

Footpad dermatitis in broilers: differences between strains and gender

Pododermatitis, also known as "bumblefoot", is an inflammatory lesion of the footpad. The objective of this study was to evaluate the influence of genetic strain and sex on the incidence of footpad lesions in broilers. The experiment was carried out at São Paulo State University, using 480 broilers distributed in a completely randomized experimental design in a 2X2 factorial arrangement (2 strains X2 sexes), with four replicates of 30 broilers each, totaling 16 experimental units. Feed intake, weight gain, feed conversion ratio, and livability were evaluated at 21, 35 and 42 days of age; production efficiency factor was determined at the end of the rearing period. On day 42, the footpads of 100 broilers were grossly examined and assigned a lesion score in a 1-3 scale (Almeida Paz & Martins, 2014). Three samples per score within treatment were collected for microscopic evaluation. Analysis of variance was applied and performance parameter means were compared by Tukey's test. Footpad lesion incidence was analyzed by the c2 test using SAS (version8.2). Ross(r) broilers presented higher feed intake during all evaluated periods, and higher weight gain only in the period 1 to 21 days compared with Cobb(r) broilers. On the other hand, Cobb(r) presented better feed conversion ratio in the periods of 1 to 35 and 1 to 42 days. The incidence of foot pad lesions was statistically different (p < 0.05) between strains and sexes, but there were no interactions between these factors. The lesion scores assigned were compatible with the histopathological results, showing that the higher the score, the more severe were the dermal and epidermal lesions.(AU)

Lesões associadas à laminite subclínica e exame radiográfico digital em vacas da raça holandês no período transicional / Lesions associated with subclinical laminitis and digital radiographic exam in holstein cows in the transitional period

Subclinical laminitis has been responsible for economic losses in dairy industry; thus, its diagnostic    is very important to prevent negative responses to milk production industry. The aim of this study  was to identify lesions associated with subclinical laminitis during the transition period with presence or absence of radiographic signs linked to this disease in Holstein cows. The cows were evaluated during the transition period and categorized into two groups (with and without laminitis) according to the lesions associated with this subclinical disease. The radiological dynamic was performed in two target points during the transition period (prepartum and postpartum), with the objective of determining capsular position possible alterations and third phalanx bone degeneration (F3). There was no effect of the presence of lesions associated with subclinical laminitis regarding the position of the third phalanx to the hoof wall (p>0.05). Significant radiographic angular differences (p 0.05) between F3 and the hoof wall were observed between the lateral and medial nails of the same digit, but not within groups (p>0.05). Overall, this study did not show radiographic signs of phalangeal misalignment in the hoof of dairy cows with lesions associated with subclinical laminitis during the transition period.

A laminite subclínica é responsável por grandes prejuízos na pecuária leiteira, sendo o seu diagnóstico de grande relevância para evitar reflexos negativos na produção. Portanto, o objetivo deste trabalho foi relacionar lesões associadas à laminite subclínica no período de transição de vacas da raça Holandês com a ocorrência ou não de sinais radiográficos vinculados a essa enfermidade. As vacas foram avaliadas durante o período de transição e divididas em dois grupos (com e sem sinais de laminite subclínica) de acordo com as lesões associadas a essa enfermidade subclínica. A dinâmica radiológica foi realizada em dois momentos durante o período de transição, com o propósito de determinar possíveis alterações de posicionamento capsular e degeneração óssea da terceira falange (F3). Não foram observados efeitos da presença de lesões associadas à laminite subclínica frente ao posicionamento da terceira falange      à cápsula do casco (p>0,05). Diferenças radiográficas significativas (p 0,05) angulares entre a F3 e      a cápsula do casco foram observadas entre as unhas lateral e medial do mesmo dígito, mas não entre grupos (p>0,05). Assim, neste estudo, vacas leiteiras no período de transição com lesões associadas      à laminite subclínica não apresentaram sinais radiográficos de desalinhamento falangeano ao estojo córneo digital.

Concentration of minerals in the hoof horny capsule of healthy and lame dairy cows / Concentração de minerais no estojo córneo do casco em vacas leiteiras sadias e com claudicação

The aim of this study was to evaluate the mineral concentrations in the hoof horny capsule of healthy Holstein cows and cows with hoof problems associated with laminitis. Twenty-one multiparous Holstein cows with an average production of 24 L of milk/day, reared with semi-extensive nutritional management, were studied. The animals were evaluated and divided into two groups based on their locomotion score (LS, range: 0 to 4). LS greater than 2 indicated laminitis-associated lesions (lame cow group: LC), and LS = 0 indicated cows without laminitis (CWL). A sample of 30 mm2 was collected from the hoof horny capsule at the abaxial wall to evaluate the concentrations of calcium, phosphorus, zinc, and magnesium. Calcium blood concentration was also evaluated. The LC group had lower magnesium concentration (P=0.008) and showed a trend (P=0.06) for lower calcium concentration compared to healthy animals (CWL), even though all animals were normocalcemic. The concentration of other minerals did not differ between the LC and CWL group. In conclusion, the magnesium concentration in the hoof horny capsule was lower in cows with lesions associated with laminitis, while phosphorus and zinc concentrations were not affected. The relationship between hoof lesions and calcium concentration requires further investigation...(AU)

O objetivo deste trabalho foi avaliar as concentrações de minerais no tecido córneo de vacas leiteiras da raça Holandês saudáveis e com afecções podais associadas à laminite. Foram utilizados 21 bovinos, fêmeas, multíparas, da raça Holandês, com produção média de 24 litros de leite por dia, submetidas a manejo semi extensivo de alimentação. Os animais foram avaliados quanto ao seu escore de locomoção (EL) e divididos em dois grupos: EL acima de dois, apresentando lesões associadas à laminite (vacas com laminite - VCL); e EL igual a zero (vacas sem laminite - VSL). Foi realizada uma coleta de tecido córneo com aproximadamente 30 mm² de área da região abaxial da muralha do casco, a partir destas amostras foi realizada análise de cálcio, fósforo, zinco e magnésio. Foi realizada coleta de sangue para análise dos níveis de cálcio. Os animais do grupo VCL apresentaram níveis de magnésio menores (P=0,008), já com o cálcio foi observado aproximação da significância (P=0,06) para menores concentrações desse mineral quando comparado às vacas sadias (VSL) apesar de todos os animais serem normocalcêmicos. Os demais minerais avaliados não apresentaram diferença entre grupos. Em conclusão, vacas com lesões associadas à laminite apresentam menores concentrações de magnésio no tecido córneo digital, sem variação nas concentrações de fósforo e zinco. A relação entre lesões podais e os níveis de...(AU)

Lesões associadas à laminite subclínica e exame radiográfico digital em vacas da raça holandês no período transicional / Lesions associated with subclinical laminitis and digital radiographic exam in holstein cows in the transitional period

Subclinical laminitis has been responsible for economic losses in dairy industry; thus, its diagnostic    is very important to prevent negative responses to milk production industry. The aim of this study  was to identify lesions associated with subclinical laminitis during the transition period with presence or absence of radiographic signs linked to this disease in Holstein cows. The cows were evaluated during the transition period and categorized into two groups (with and without laminitis) according to the lesions associated with this subclinical disease. The radiological dynamic was performed in two target points during the transition period (prepartum and postpartum), with the objective of determining capsular position possible alterations and third phalanx bone degeneration (F3). There was no effect of the presence of lesions associated with subclinical laminitis regarding the position of the third phalanx to the hoof wall (p>0.05). Significant radiographic angular differences (p 0.05) between F3 and the hoof wall were observed between the lateral and medial nails of the same digit, but not within groups (p>0.05). Overall, this study did not show radiographic signs of phalangeal misalignment in the hoof of dairy cows with lesions associated with subclinical laminitis during the transition period.(AU)

A laminite subclínica é responsável por grandes prejuízos na pecuária leiteira, sendo o seu diagnóstico de grande relevância para evitar reflexos negativos na produção. Portanto, o objetivo deste trabalho foi relacionar lesões associadas à laminite subclínica no período de transição de vacas da raça Holandês com a ocorrência ou não de sinais radiográficos vinculados a essa enfermidade. As vacas foram avaliadas durante o período de transição e divididas em dois grupos (com e sem sinais de laminite subclínica) de acordo com as lesões associadas a essa enfermidade subclínica. A dinâmica radiológica foi realizada em dois momentos durante o período de transição, com o propósito de determinar possíveis alterações de posicionamento capsular e degeneração óssea da terceira falange (F3). Não foram observados efeitos da presença de lesões associadas à laminite subclínica frente ao posicionamento da terceira falange      à cápsula do casco (p>0,05). Diferenças radiográficas significativas (p 0,05) angulares entre a F3 e      a cápsula do casco foram observadas entre as unhas lateral e medial do mesmo dígito, mas não entre grupos (p>0,05). Assim, neste estudo, vacas leiteiras no período de transição com lesões associadas      à laminite subclínica não apresentaram sinais radiográficos de desalinhamento falangeano ao estojo córneo digital.(AU)

LESÕES ASSOCIADAS À LAMINITE SUBCLÍNICA E EXAME RADIOGRÁFICO DIGITAL EM VACAS DA RAÇA HOLANDÊS NO PERÍODO TRANSICIONAL

Abstract Subclinical laminitis has been responsible for economic losses in dairy industry; thus, its diagnostic is very important to prevent negative responses to milk production industry. The aim of this study was to identify lesions associated with subclinical laminitis during the transition period with presence or absence of radiographic signs linked to this disease in Holstein cows. The cows were evaluated during the transition period and categorized into two groups (with and without laminitis) according to the lesions associated with this subclinical disease. The radiological dynamic was performed in two target points during the transition period (prepartum and postpartum), with the objective of determining capsular position possible alterations and third phalanx bone degeneration (F3). There was no effect of the presence of lesions associated with subclinical laminitis regarding the position of the third phalanx to the hoof wall (p>0.05). Significant radiographic angular differences (p 0.05) between F3 and the hoof wall were observed between the lateral and medial nails of the same digit, but not within groups (p>0.05). Overall, this study did not show radiographic signs of phalangeal misalignment in the hoof of dairy cows with lesions associated with subclinical laminitis during the transition period.

Resumo A laminite subclínica é responsável por grandes prejuízos na pecuária leiteira, sendo o seu diagnóstico de grande relevância para evitar reflexos negativos na produção. Portanto, o objetivo deste trabalho foi relacionar lesões associadas à laminite subclínica no período de transição de vacas da raça Holandês com a ocorrência ou não de sinais radiográficos vinculados a essa enfermidade. As vacas foram avaliadas durante o período de transição e divididas em dois grupos (com e sem sinais de laminite subclínica) de acordo com as lesões associadas a essa enfermidade subclínica. A dinâmica radiológica foi realizada em dois momentos durante o período de transição, com o propósito de determinar possíveis alterações de posicionamento capsular e degeneração óssea da terceira falange (F3). Não foram observados efeitos da presença de lesões associadas à laminite subclínica frente ao posicionamento da terceira falange à cápsula do casco (p>0,05). Diferenças radiográficas significativas (p 0,05) angulares entre a F3 e a cápsula do casco foram observadas entre as unhas lateral e medial do mesmo dígito, mas não entre grupos (p>0,05). Assim, neste estudo, vacas leiteiras no período de transição com lesões associadas à laminite subclínica não apresentaram sinais radiográficos de desalinhamento falangeano ao estojo córneo digital.

Concentration of minerals in the hoof horny capsule of healthy and lame dairy cows / Concentração de minerais no estojo córneo do casco em vacas leiteiras sadias e com claudicação

The aim of this study was to evaluate the mineral concentrations in the hoof horny capsule of healthy Holstein cows and cows with hoof problems associated with laminitis. Twenty-one multiparous Holstein cows with an average production of 24 L of milk/day, reared with semi-extensive nutritional management, were studied. The animals were evaluated and divided into two groups based on their locomotion score (LS, range: 0 to 4). LS greater than 2 indicated laminitis-associated lesions (lame cow group: LC), and LS = 0 indicated cows without laminitis (CWL). A sample of 30 mm2 was collected from the hoof horny capsule at the abaxial wall to evaluate the concentrations of calcium, phosphorus, zinc, and magnesium. Calcium blood concentration was also evaluated. The LC group had lower magnesium concentration (P=0.008) and showed a trend (P=0.06) for lower calcium concentration compared to healthy animals (CWL), even though all animals were normocalcemic. The concentration of other minerals did not differ between the LC and CWL group. In conclusion, the magnesium concentration in the hoof horny capsule was lower in cows with lesions associated with laminitis, while phosphorus and zinc concentrations were not affected. The relationship between hoof lesions and calcium concentration requires further investigation...

O objetivo deste trabalho foi avaliar as concentrações de minerais no tecido córneo de vacas leiteiras da raça Holandês saudáveis e com afecções podais associadas à laminite. Foram utilizados 21 bovinos, fêmeas, multíparas, da raça Holandês, com produção média de 24 litros de leite por dia, submetidas a manejo semi extensivo de alimentação. Os animais foram avaliados quanto ao seu escore de locomoção (EL) e divididos em dois grupos: EL acima de dois, apresentando lesões associadas à laminite (vacas com laminite - VCL); e EL igual a zero (vacas sem laminite - VSL). Foi realizada uma coleta de tecido córneo com aproximadamente 30 mm² de área da região abaxial da muralha do casco, a partir destas amostras foi realizada análise de cálcio, fósforo, zinco e magnésio. Foi realizada coleta de sangue para análise dos níveis de cálcio. Os animais do grupo VCL apresentaram níveis de magnésio menores (P=0,008), já com o cálcio foi observado aproximação da significância (P=0,06) para menores concentrações desse mineral quando comparado às vacas sadias (VSL) apesar de todos os animais serem normocalcêmicos. Os demais minerais avaliados não apresentaram diferença entre grupos. Em conclusão, vacas com lesões associadas à laminite apresentam menores concentrações de magnésio no tecido córneo digital, sem variação nas concentrações de fósforo e zinco. A relação entre lesões podais e os níveis de...

Bone characteristics of broilers supplemented with vitamin D

Vitamin D is added to broiler diets to supply its physiological requirement for bone formation. The fast growth rate of modern broilers is often associated with poor bone formation. Increasing vitamin D supplementation levels and the use of more available sources have applied to try to prevent leg problems, to increase carcass yield, and to improve the performance of broilers. The present study evaluated three vitamin D supplementation levels (1) 3,500 IU (control); (2) control + 1,954 IU of 25-hydroxycholecalciferol; and (3) control + 3,500 IU of vitamin D in broiler diets supplied up to 21 days of age. The objective was to investigate if the vitamin D levels above the recommendations could reduce leg problems in broilers. In this experiment, a total of 1,296 one-day-old male and female Cobb(r) 500 broilers were used. A 2 x 3 factorial arrangement was applied, consisting of two sexes and three vitamin D levels. No difference was found between the levels of vitamin D (p > 0.05), the performance of males or females, the gait score, the valgus and varus incidence, the tibial dyschondroplasia incidence, the occurance of femoral degeneration, the bone colorimetric, and the carcass yield. Parts yield differences were found (p > 0.05), except for liver and intestine yields. We concluded that the lowest tested vitamin D level (3,500 IU per kilogram of feed) added to the diet was the best choice in terms of cost/benefit to help minimizing leg problems in broilers.(AU)

Bone characteristics of broilers supplemented with vitamin D

Vitamin D is added to broiler diets to supply its physiological requirement for bone formation. The fast growth rate of modern broilers is often associated with poor bone formation. Increasing vitamin D supplementation levels and the use of more available sources have applied to try to prevent leg problems, to increase carcass yield, and to improve the performance of broilers. The present study evaluated three vitamin D supplementation levels (1) 3,500 IU (control); (2) control + 1,954 IU of 25-hydroxycholecalciferol; and (3) control + 3,500 IU of vitamin D in broiler diets supplied up to 21 days of age. The objective was to investigate if the vitamin D levels above the recommendations could reduce leg problems in broilers. In this experiment, a total of 1,296 one-day-old male and female Cobb(r) 500 broilers were used. A 2 x 3 factorial arrangement was applied, consisting of two sexes and three vitamin D levels. No difference was found between the levels of vitamin D (p > 0.05), the performance of males or females, the gait score, the valgus and varus incidence, the tibial dyschondroplasia incidence, the occurance of femoral degeneration, the bone colorimetric, and the carcass yield. Parts yield differences were found (p > 0.05), except for liver and intestine yields. We concluded that the lowest tested vitamin D level (3,500 IU per kilogram of feed) added to the diet was the best choice in terms of cost/benefit to help minimizing leg problems in broilers.

Performance, carcass characteristics and litter moisture in broilers housed at two densities / Desempenho, características de carcaça e umidade da cama em frangos de corte alojados em duas densidades

The effect of stocking density in broiler chickens (11.08 and 13.20 birds m-2), between 5 and 45 days of age, was assessed with regard to performance, cut yield, litter moisture and frequency of pododermatitis injuries. Further, 476 one-day chicks Cobb 500® were distributed in a completely randomized design at two densities (birds m- ²), with seven replications per treatment in 14 experimental units. Birds housed at a lower density (11.08) increased feed intake (p 0.05), without any effect on weight gain and feed conversion. Retail yields were not influenced (p > 0.05) by treatments. In the case of higher density (3.20) the litter showed higher moisture content (p 0.05) at 28 and 35 days of age. There was a higher occurrence of pododermatitis in birds housed at a density of 13.20 birds m-2. Results show that increased housing density from 11.08 to 13.20 birds m-2 does not affect growth performance, carcass yield and cuts. However, a housing density of 13.20 birds m-2 increased litter moisture and provided a higher occurrence of grade I pododermatitis.(AU)

Foi realizado um experimento para verificar o impacto da densidade de alojamento em frangos de corte (11,08 e 13,20 aves m-2) sobre o desempenho, rendimento de cortes, umidade da cama e frequência de lesões por pododermatite no período de cinco a 45 dias de idade. Foram utilizados 476 pintos da linhagem Cobb 500® com um dia de idade, distribuídos em um delineamento experimental inteiramente casualizado, empregando duas densidades (aves m-2) e sete repetições por tratamento, 14 unidades experimentais. Observou-se que as aves alojadas em menor densidade (11,08) apresentaram maior consumo de ração (p 0,05), porém, sem afetar o ganho de peso e a conversão alimentar. O rendimento das partes não foi influenciado pelos tratamentos (p > 0,05). Foi verificado efeito significado (p 0,05) sobre a umidade da cama na maior densidade (3,20), apresentando maior umidade (p 0,05) aos 28 e aos 35 dias de idade das aves. Observou-se maior incidência por pododermatite em aves alojadas na maior densidade (3,20). Conclui-se que o aumento da densidade de alojamento de 11,08 para 13,20 aves m-2, não afeta o desempenho zootécnico, rendimento da carcaça e cortes. Porém, promoveu aumento na umidade na cama, assim como a maior incidência de pododermatite de grau 1 foi observada na densidade de 13,20 aves m-2.(AU)

Performance, carcass characteristics and litter moisture in broilers housed at two densities / Desempenho, características de carcaça e umidade da cama em frangos de corte alojados em duas densidades

The effect of stocking density in broiler chickens (11.08 and 13.20 birds m-2), between 5 and 45 days of age, was assessed with regard to performance, cut yield, litter moisture and frequency of pododermatitis injuries. Further, 476 one-day chicks Cobb 500® were distributed in a completely randomized design at two densities (birds m- ²), with seven replications per treatment in 14 experimental units. Birds housed at a lower density (11.08) increased feed intake (p 0.05), without any effect on weight gain and feed conversion. Retail yields were not influenced (p > 0.05) by treatments. In the case of higher density (3.20) the litter showed higher moisture content (p 0.05) at 28 and 35 days of age. There was a higher occurrence of pododermatitis in birds housed at a density of 13.20 birds m-2. Results show that increased housing density from 11.08 to 13.20 birds m-2 does not affect growth performance, carcass yield and cuts. However, a housing density of 13.20 birds m-2 increased litter moisture and provided a higher occurrence of grade I pododermatitis.

Foi realizado um experimento para verificar o impacto da densidade de alojamento em frangos de corte (11,08 e 13,20 aves m-2) sobre o desempenho, rendimento de cortes, umidade da cama e frequência de lesões por pododermatite no período de cinco a 45 dias de idade. Foram utilizados 476 pintos da linhagem Cobb 500® com um dia de idade, distribuídos em um delineamento experimental inteiramente casualizado, empregando duas densidades (aves m-2) e sete repetições por tratamento, 14 unidades experimentais. Observou-se que as aves alojadas em menor densidade (11,08) apresentaram maior consumo de ração (p 0,05), porém, sem afetar o ganho de peso e a conversão alimentar. O rendimento das partes não foi influenciado pelos tratamentos (p > 0,05). Foi verificado efeito significado (p 0,05) sobre a umidade da cama na maior densidade (3,20), apresentando maior umidade (p 0,05) aos 28 e aos 35 dias de idade das aves. Observou-se maior incidência por pododermatite em aves alojadas na maior densidade (3,20). Conclui-se que o aumento da densidade de alojamento de 11,08 para 13,20 aves m-2, não afeta o desempenho zootécnico, rendimento da carcaça e cortes. Porém, promoveu aumento na umidade na cama, assim como a maior incidência de pododermatite de grau 1 foi observada na densidade de 13,20 aves m-2.