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1.
R. bras. Ci. avíc. ; 19(1,n.esp): 43-50, jan.-mar. 2017. tab, graf
Artigo em Inglês | VETINDEX | ID: vti-17002

Resumo

An experiment was conducted to compare three nutritional programs, which were developed with tannin-free grain sorghum based diets, evaluating performance, carcass yield and bromatological composition of the pectoral muscle of broilers. A total 1360 chicks mixed (50:50), from one to 42 days old Hubbard Flex Broilers, were housed in a completely randomized design consisting of treatments and 10 replicates each, distributed as follows: three programs with whole sorghum grain based diets (nutritional program with daily adjustment, nutritional program with every three days adjustment and nutritional program with four stages and a program with ground and whole sorghum grain based feed (four stages). The cumulative performance was evaluated at, 21 and 42 days, determining feed intake, weight gain, feed conversion and viability. At 42 days, the yield of eviscerated carcass, breast (full and boneless), thighs/drumsticks and wings and breast composition were evaluated. Nutritional adjustments showed better feed conversion, did not affect the carcass, commercial cuts yield and had a good breast meat quality. It can be concluded that daily feed programs could be performed in poultry industry with the mixture of whole sorghum grains and concentrates directly on farms contributing to better logistics and feed transportation cost.(AU)


Assuntos
Animais , Galinhas/metabolismo , Galinhas/fisiologia , Fenômenos Fisiológicos da Nutrição Animal , Sorghum
2.
Rev. bras. ciênc. avic ; 19(1,n.esp): 43-50, jan.-mar. 2017. tab, graf
Artigo em Inglês | VETINDEX | ID: biblio-1490387

Resumo

An experiment was conducted to compare three nutritional programs, which were developed with tannin-free grain sorghum based diets, evaluating performance, carcass yield and bromatological composition of the pectoral muscle of broilers. A total 1360 chicks mixed (50:50), from one to 42 days old Hubbard Flex Broilers, were housed in a completely randomized design consisting of treatments and 10 replicates each, distributed as follows: three programs with whole sorghum grain based diets (nutritional program with daily adjustment, nutritional program with every three days adjustment and nutritional program with four stages and a program with ground and whole sorghum grain based feed (four stages). The cumulative performance was evaluated at, 21 and 42 days, determining feed intake, weight gain, feed conversion and viability. At 42 days, the yield of eviscerated carcass, breast (full and boneless), thighs/drumsticks and wings and breast composition were evaluated. Nutritional adjustments showed better feed conversion, did not affect the carcass, commercial cuts yield and had a good breast meat quality. It can be concluded that daily feed programs could be performed in poultry industry with the mixture of whole sorghum grains and concentrates directly on farms contributing to better logistics and feed transportation cost.


Assuntos
Animais , Fenômenos Fisiológicos da Nutrição Animal , Galinhas/fisiologia , Galinhas/metabolismo , Sorghum
3.
R. bras. Ci. avíc. ; 19(1,n.esp): 67-74, jan.-mar. 2017. tab
Artigo em Inglês | VETINDEX | ID: vti-16998

Resumo

The objective of this study was to evaluate the effect of using exoenzyme phytase in broiler's diets on digestibility of nutrients, feed energy and tibia bone mineralization. A completely randomized design was used, with the following treatments: sorghum with dicalcium phosphate (SDP), corn with dicalcium phosphate (CDP), sorghum with meat and bone meal (SMBM), sorghum with valued phytase (SVP) and sorghum with phytase without valued (SPWV). For digestibility analysis, eighty 15 day old broilers were used, a total of 1400 male Hubbard Flex chickens, which were submitted to total excreta collection to obtain the percentages of food digestibility, crude protein, ether extract, apparent metabolizable energy, calcium and phosphorus while for tibias mineralization. Six birds per treatment were used, where determination of mineral matter, calcium and phosphorus were performed. Metabolizable energy (ME) and apparent metabolizable energy corrected for nitrogen (AMEn) of the feed were also calculated. Data were subjected to variation analysis and the average compared by 5% Tukey test. There was no difference between treatments for the digestibility at 15-20 day old as well as for the feed energy values, but the diets with phytase had higher phosphorous percentage values for tibia bone mineralization, demonstrating that exogenous phytase enzyme is able to hydrolyze phytate origininated from plant and release the phosphorus for assimilation by animals, acting as a substitute for phosphorus plant sources.(AU)


Assuntos
Animais , Galinhas/crescimento & desenvolvimento , Galinhas/metabolismo , Calcificação Fisiológica , Ração Animal/análise , Ração Animal
4.
Rev. bras. ciênc. avic ; 19(1,n.esp): 67-74, jan.-mar. 2017. tab
Artigo em Inglês | VETINDEX | ID: biblio-1490383

Resumo

The objective of this study was to evaluate the effect of using exoenzyme phytase in broiler's diets on digestibility of nutrients, feed energy and tibia bone mineralization. A completely randomized design was used, with the following treatments: sorghum with dicalcium phosphate (SDP), corn with dicalcium phosphate (CDP), sorghum with meat and bone meal (SMBM), sorghum with valued phytase (SVP) and sorghum with phytase without valued (SPWV). For digestibility analysis, eighty 15 day old broilers were used, a total of 1400 male Hubbard Flex chickens, which were submitted to total excreta collection to obtain the percentages of food digestibility, crude protein, ether extract, apparent metabolizable energy, calcium and phosphorus while for tibias mineralization. Six birds per treatment were used, where determination of mineral matter, calcium and phosphorus were performed. Metabolizable energy (ME) and apparent metabolizable energy corrected for nitrogen (AMEn) of the feed were also calculated. Data were subjected to variation analysis and the average compared by 5% Tukey test. There was no difference between treatments for the digestibility at 15-20 day old as well as for the feed energy values, but the diets with phytase had higher phosphorous percentage values for tibia bone mineralization, demonstrating that exogenous phytase enzyme is able to hydrolyze phytate origininated from plant and release the phosphorus for assimilation by animals, acting as a substitute for phosphorus plant sources.


Assuntos
Animais , Calcificação Fisiológica , Galinhas/crescimento & desenvolvimento , Galinhas/metabolismo , Ração Animal , Ração Animal/análise
5.
Rev. bras. ciênc. avic ; 18(2): 209-216, apr.-jun. 2016. tab
Artigo em Inglês | VETINDEX | ID: biblio-1490270

Resumo

The objective of the study was to evaluate the effect of nutritional plans on the productive and economic performance of Hubbard Flex broiler chickens. A completely randomized experimental design was applied, consisting of five treatments. Treatments consisted of five different nutritional plans: a basal diet containing the nutrient and energy levels recommended by literature and designated reference diet; two diets containing 1.5% and 3% lower levels than the reference diet; and two diets containing 1.5% and 3% higher levels than the reference diet (-3%, -1.5%, reference plan, +1.5% and +3%). Feed intake (FI), body weight (BW), feed conversion rate (FCR), livability (L) and productive efficient index (PEI) were determined when broilers were 42 days old. Broilers were processed, and carcass and parts (breast fillet, leg, and wings) yields were determined. The economic viablility of the nutitional plans was evaluated as a function of feed cost/kg live and carcass weights, economic efficiency index (EEI), and cost index (CI). Feed intake and the feed conversion rate decreased as dietary nutrient and energy levels increased. Feed cost/kg live weight, economic efficiency index, and cost index cost increased as dietary nutrient and energy levels increased. Feed intake, feed conversion ratio, production efficiency index, and breast yield improved with increasing nutritional and energy levels. However, worse economic results were obtained with higher nutritional and energy levels.


Assuntos
Animais , Eficiência , Galinhas , Planejamento Alimentar/economia , Planejamento Alimentar/organização & administração , Planejamento Alimentar/tendências , Economia
6.
R. bras. Ci. avíc. ; 18(2): 209-216, apr.-jun. 2016. tab
Artigo em Inglês | VETINDEX | ID: vti-338228

Resumo

The objective of the study was to evaluate the effect of nutritional plans on the productive and economic performance of Hubbard Flex broiler chickens. A completely randomized experimental design was applied, consisting of five treatments. Treatments consisted of five different nutritional plans: a basal diet containing the nutrient and energy levels recommended by literature and designated reference diet; two diets containing 1.5% and 3% lower levels than the reference diet; and two diets containing 1.5% and 3% higher levels than the reference diet (-3%, -1.5%, reference plan, +1.5% and +3%). Feed intake (FI), body weight (BW), feed conversion rate (FCR), livability (L) and productive efficient index (PEI) were determined when broilers were 42 days old. Broilers were processed, and carcass and parts (breast fillet, leg, and wings) yields were determined. The economic viablility of the nutitional plans was evaluated as a function of feed cost/kg live and carcass weights, economic efficiency index (EEI), and cost index (CI). Feed intake and the feed conversion rate decreased as dietary nutrient and energy levels increased. Feed cost/kg live weight, economic efficiency index, and cost index cost increased as dietary nutrient and energy levels increased. Feed intake, feed conversion ratio, production efficiency index, and breast yield improved with increasing nutritional and energy levels. However, worse economic results were obtained with higher nutritional and energy levels.(AU)


Assuntos
Animais , Eficiência , Planejamento Alimentar/economia , Planejamento Alimentar/organização & administração , Planejamento Alimentar/tendências , Galinhas , Economia
7.
Rev. bras. ciênc. avic ; 17(1): 85-102, jan.-mar. 2015. tab
Artigo em Inglês | VETINDEX | ID: biblio-1490127

Resumo

This study aimed at evaluating the effects of whole and ground sorghum, compared with ground corn, on the live weight, feed conversion ratio, organs weight and intestinal biometrics and histomorphometrics. In total, 960 Hubbard Flex broilers were reared until 42-day-old and distributed into 24 pens, according to the three treatments: ground corn, whole-grain sorghum, and ground sorghum. On day 42, five male birds per treatment were selected by similar body weight and sacrificed. Gizzard absolute weight, and proventriculus, liver, pancreas and heart relative weights, and duodenum, jejunum, ileum, ceca, and colon length and relative weight were determined. Villus characteristics and intestinal mucosa absorption surface area were evaluated. Broilers fed sorghum, independently of physical form, were heavier and had greater feed conversion ratio than those fed ground corn. Gizzard showed the highest relative weight in broilers fed whole sorghum compared to corn. Liver and jejunum relative weight was higher in broilers fed ground corn, compared to ground sorghum. Whole small intestine, cecum and colon relative lengths showed no difference among treatments. Deeper crypts were found in the duodenum of broilers fed whole grain sorghum, compared to ground sorghum, as well as in jejunum compared to ground corn; however, intestinal absorption surface area was not different among treatments. Whole or ground grain sorghum may replace corn in the feed of 1- to 42-d-old broilers, since they improve body weight and feed conversion ratio, and not adversely affect intestinal morphometry and organs weight.


Assuntos
Animais , Ração Animal , Ração Animal/análise , Sorghum/classificação , Sorghum/enzimologia , Sorghum/fisiologia , Sorghum/química
8.
R. bras. Ci. avíc. ; 17(1): 85-102, jan.-mar. 2015. tab
Artigo em Inglês | VETINDEX | ID: vti-39538

Resumo

This study aimed at evaluating the effects of whole and ground sorghum, compared with ground corn, on the live weight, feed conversion ratio, organs weight and intestinal biometrics and histomorphometrics. In total, 960 Hubbard Flex broilers were reared until 42-day-old and distributed into 24 pens, according to the three treatments: ground corn, whole-grain sorghum, and ground sorghum. On day 42, five male birds per treatment were selected by similar body weight and sacrificed. Gizzard absolute weight, and proventriculus, liver, pancreas and heart relative weights, and duodenum, jejunum, ileum, ceca, and colon length and relative weight were determined. Villus characteristics and intestinal mucosa absorption surface area were evaluated. Broilers fed sorghum, independently of physical form, were heavier and had greater feed conversion ratio than those fed ground corn. Gizzard showed the highest relative weight in broilers fed whole sorghum compared to corn. Liver and jejunum relative weight was higher in broilers fed ground corn, compared to ground sorghum. Whole small intestine, cecum and colon relative lengths showed no difference among treatments. Deeper crypts were found in the duodenum of broilers fed whole grain sorghum, compared to ground sorghum, as well as in jejunum compared to ground corn; however, intestinal absorption surface area was not different among treatments. Whole or ground grain sorghum may replace corn in the feed of 1- to 42-d-old broilers, since they improve body weight and feed conversion ratio, and not adversely affect intestinal morphometry and organs weight.(AU)


Assuntos
Animais , Ração Animal/análise , Ração Animal , Sorghum/classificação , Sorghum/enzimologia , Sorghum/fisiologia , Sorghum/química
9.
Arq. bras. med. vet. zootec ; 66(1): 47-54, fev. 2014. ilus, tab
Artigo em Português | VETINDEX | ID: vti-10317

Resumo

O objetivo deste estudo foi avaliar e comparar a eficácia de dois protocolos de tratamento de ceratoconjuntivite seca (CCS) experimentalmente induzida em coelhos: uma formulação oftálmica tópica composta por álcool polivinílico 1,4%, adicionado com acetilcisteína 10% e pilocarpina 1% (AAP), e outro protocolo com o uso do óleo de semente de linhaça (OL) tópico em forma de colírio, durante 12 semanas. Foram utilizados 15 coelhos machos, adultos, da raça Nova Zelândia, alocados aleatoriamente em três grupos: grupo C (controle), grupo AAP (formulação oftálmica) e grupo L (OL tópica). Os animais foram avaliados semanalmente pelo teste lacrimal de Schirmer, teste de fluoresceína e teste de Rosa Bengala; uma vez por mês, pelo exame de citologia esfoliativa ocular; ao final do experimento, pela análise histopatológica da córnea e conjuntiva. Os resultados demonstraram que houve um aumento maior na produção lacrimal quando utilizada a formulação oftálmica, e uma resolução mais rápida das úlceras de córnea, bem como diminuição no número de células desvitalizadas quando utilizado o óleo de semente de linhaça, além de aumento no número de células caliciformes em ambos os grupos de tratamento. A associação desses dois protocolos pode ser no futuro uma alternativa no tratamento da CCS.(AU)


The objective of this study was to evaluate and compare the effectiveness of two treatment protocol of experimentally induced keratoconjunctivitis sicca (KCS) in rabbits, a topical ophthalmic formulation composed by 1.4% povinilic alcohol added with 10% acetylcysteine and 1% pilocarpine (AAP) and another protocol with the topical use of the linseed seed oil (LO) in eye drop form f or 12 weeks. Fifteen male New Zealand white rabbits were aleatory allocated in 3 groups: Group C (Control), Group AAP (ophthalmic formulation) and Group L (LO topical). The animals were evaluated weekly using the Schirmer's tear test, fluorescein test and Rose Bengal test monthly for ocular cytology, and at the end of the experiment for histopathological analysis of cornea and conjunctive. The results demonstrated that there was a larger increase in the tear production when the ophthalmic formulation was us ed and a faster rapid resolution of corneal ulcers and decrease in the number of devitalized cells when linseed seed oil was used, besides an increase in the number of caliciform cells in both treatment groups. The association of those two protocols can be a future alternative in the treatment of KCS.(AU)


Assuntos
Animais , Coelhos , Ceratoconjuntivite Seca/patologia , Pilocarpina/análise , Córnea , Úlcera da Córnea/patologia , Coelhos/classificação
10.
Arq. Inst. Biol ; 80(1): 19-26, jan.-mar.2013.
Artigo em Português | LILACS, VETINDEX | ID: biblio-1462215

Resumo

A mastite é uma infecção frequente da glândula mamária, sendo a principal doença que afeta o úbere das fêmeas e responsável pelos maiores prejuízos à produção leiteira em caprinos, reduzindo em quantidade e depreciando a qualidade do leite e seus derivados. Nesse estudo foram colhidas amostras de leite de cabras com reação positiva ao CMT, em propriedades localizadas em Bonfim de Feira, Barra do Pojuca, Feira de Santana, Camaçari, Anguera e Antônio Cardoso, todas próximas à Cidade de Salvador, Bahia. Do material coletado foi realizado cultivo bacteriológico em ágar sangue de ovino a 10%, ágar McConkey e também enriquecido em caldo BHI. O Staphylococcus spp. foi a bactéria de maior prevalência (90,3%), seguida de Streptococcus (4,8%), Micrococcus (1,6%) e Enterobacter (1,6%). Todas as bactérias foram submetidas ao teste de sensibilidade aos antimicrobianospelo método de difusão em disco, sendo que 54,1% das estirpes estudadas apresentaram sensibilidade a todas as drogas testadas, e 45,9% das estirpes identificadas apresentaram resistência a pelo menos um dos antimicrobianos. O presente estudo confirmou o Staphylococcus spp. como a principal bactéria envolvida na etiologia das mastites subclínicas caprinas.


Bacteria involved in subclinical mastitis in goats in the region of Salvador, Bahia, Brazil. Mastitis is a common infection of the mammary gland, the main disease affecting the udder of females, and responsible for major losses in milk production in goats, decreasing the quantity and quality of the milk and its derivatives. In this study milk samples were collected from goats with positive reaction to CMT in properties located in Bonfim de Feira, Barra do Pojuca, Feira de Santana, Camaçari, Anguera and Antônio Cardoso, all of which are places surrounding the city of Salvador, Bahia, Brazil. The samples were submitted to bacteriological culture carried out in agar with 10% sheep blood, McConkey agar, and agar enriched with BHI broth. Staphylococcus spp. bacteria was the most prevalent (90.3%), followed by Streptococcus (4.8%), Micrococcus (1.6%) and Enterobacter (1.6%). All bacteria were subjected to antimicrobial susceptibility testing by the disc diffusion method, revealing that 54.1% of the strains studied were sensitive to all drugs tested, while 45.9% of identified strains showed resistance to at least one of antimicrobials. The present studyconfirmed Staphylococcus spp. as the main bacteria involved in the etiology of subclinical goat mastitis.


Assuntos
Animais , Antibacterianos/farmacologia , Glândulas Mamárias Animais/anatomia & histologia , Mastite/patologia , Cabras/classificação
11.
Arq. Inst. Biol. ; 80(1): 19-26, jan.-mar. 2013.
Artigo em Português | VETINDEX | ID: vti-325507

Resumo

A mastite é uma infecção frequente da glândula mamária, sendo a principal doença que afeta o úbere das fêmeas e responsável pelos maiores prejuízos à produção leiteira em caprinos, reduzindo em quantidade e depreciando a qualidade do leite e seus derivados. Nesse estudo foram colhidas amostras de leite de cabras com reação positiva ao CMT, em propriedades localizadas em Bonfim de Feira, Barra do Pojuca, Feira de Santana, Camaçari, Anguera e Antônio Cardoso, todas próximas à Cidade de Salvador, Bahia. Do material coletado foi realizado cultivo bacteriológico em ágar sangue de ovino a 10%, ágar McConkey e também enriquecido em caldo BHI. O Staphylococcus spp. foi a bactéria de maior prevalência (90,3%), seguida de Streptococcus (4,8%), Micrococcus (1,6%) e Enterobacter (1,6%). Todas as bactérias foram submetidas ao teste de sensibilidade aos antimicrobianospelo método de difusão em disco, sendo que 54,1% das estirpes estudadas apresentaram sensibilidade a todas as drogas testadas, e 45,9% das estirpes identificadas apresentaram resistência a pelo menos um dos antimicrobianos. O presente estudo confirmou o Staphylococcus spp. como a principal bactéria envolvida na etiologia das mastites subclínicas caprinas. (AU)


Bacteria involved in subclinical mastitis in goats in the region of Salvador, Bahia, Brazil. Mastitis is a common infection of the mammary gland, the main disease affecting the udder of females, and responsible for major losses in milk production in goats, decreasing the quantity and quality of the milk and its derivatives. In this study milk samples were collected from goats with positive reaction to CMT in properties located in Bonfim de Feira, Barra do Pojuca, Feira de Santana, Camaçari, Anguera and Antônio Cardoso, all of which are places surrounding the city of Salvador, Bahia, Brazil. The samples were submitted to bacteriological culture carried out in agar with 10% sheep blood, McConkey agar, and agar enriched with BHI broth. Staphylococcus spp. bacteria was the most prevalent (90.3%), followed by Streptococcus (4.8%), Micrococcus (1.6%) and Enterobacter (1.6%). All bacteria were subjected to antimicrobial susceptibility testing by the disc diffusion method, revealing that 54.1% of the strains studied were sensitive to all drugs tested, while 45.9% of identified strains showed resistance to at least one of antimicrobials. The present studyconfirmed Staphylococcus spp. as the main bacteria involved in the etiology of subclinical goat mastitis. (AU)


Assuntos
Animais , Glândulas Mamárias Animais/anatomia & histologia , Mastite/patologia , Antibacterianos/farmacologia , Cabras/classificação
12.
Arq. Inst. Biol. (Online) ; 77(2): 233-237, abr.-jun. 2010. tab
Artigo em Português | VETINDEX, LILACS | ID: biblio-1390603

Resumo

A tuberculose é uma enfermidade infecciosa crônica, que afeta mamíferos e aves e constitui um sério problema de saúde pública e animal. Objetivando realizar um levantamento molecular da enfermidade em bovinos abatidos em matadouros frigoríficos no Estado da Bahia, Brasil, foram analisadas as lesões pulmonares e de linfonodos mediastínicos de 43 carcaças de animais abatidos em três matadouros-frigoríficos localizados na Região Metropolitana de Salvador, Bahia. Sete isolados de Mycobacterium bovis foram identificados, através da técnica do spolygotyping, e discriminados em três diferentes espoligotipos (SB1055, SB0120 e SB0268) descritos no Brasil e em diversas áreas do mundo. Os resultados indicam que o método de diagnóstico utilizado pode contribuir para a criação de uma base de dados para o estudo epidemiológico da tuberculose bovina no Estado da Bahia.


Tuberculosis is an infectious chronic disease that affects mammals and birds and constitutes a serious problem for public and animal health. Pulmonary and mediastinic lymph node lesions of 43 animals slaughtered in 3 slaughterhouses in the metropolitan region of the city of Salvador, Bahia, Brazil, were analyzed with the objective of obtaining a molecular survey of the disease in bovines slaughtered in slaughterhouses in the state. Seven isolates ofMycobacterium bovis were identified through the spoligotyping technique and classified into 3 different spoligotypes (SB1055, SB0120, SB0268), described in Brazil and in many areas worldwide. The results indicate that the diagnostic method utilized may contribute to the creation of a database for the epidemiologic study of bovine tuberculosis in the state of Bahia.


Assuntos
Animais , Bovinos , Mycobacterium bovis/isolamento & purificação , Mycobacterium bovis/genética , Brasil , Técnicas de Tipagem Bacteriana/veterinária , Matadouros
13.
Arq. Inst. Biol. ; 77(2)2010.
Artigo em Português | VETINDEX | ID: vti-760001

Resumo

ABSTRACT Tuberculosis is an infectious chronic disease that affects mammals and birds and constitutes a serious problem for public and animal health. Pulmonary and mediastinic lymph node lesions of 43 animals slaughtered in 3 slaughterhouses in the metropolitan region of the city of Salvador, Bahia, Brazil, were analyzed with the objective of obtaining a molecular survey of the disease in bovines slaughtered in slaughterhouses in the state. Seven isolates ofMycobacterium bovis were identified through the spoligotyping technique and classified into 3 different spoligotypes (SB1055, SB0120, SB0268), described in Brazil and in many areas worldwide. The results indicate that the diagnostic method utilized may contribute to the creation of a database for the epidemiologic study of bovine tuberculosis in the state of Bahia.


RESUMO A tuberculose é uma enfermidade infecciosa crônica, que afeta mamíferos e aves e constitui um sério problema de saúde pública e animal. Objetivando realizar um levantamento molecular da enfermidade em bovinos abatidos em matadouros frigoríficos no Estado da Bahia, Brasil, foram analisadas as lesões pulmonares e de linfonodos mediastínicos de 43 carcaças de animais abatidos em três matadouros-frigoríficos localizados na Região Metropolitana de Salvador, Bahia. Sete isolados de Mycobacterium bovis foram identificados, através da técnica do spolygotyping, e discriminados em três diferentes espoligotipos (SB1055, SB0120 e SB0268) descritos no Brasil e em diversas áreas do mundo. Os resultados indicam que o método de diagnóstico utilizado pode contribuir para a criação de uma base de dados para o estudo epidemiológico da tuberculose bovina no Estado da Bahia.

14.
Arq. Inst. Biol ; 76(4)2009.
Artigo em Português | LILACS-Express | VETINDEX | ID: biblio-1462076

Resumo

ABSTRACT Aiming to evaluate the effect of supplementation with megadoses of vitamin C on the diet of fingerlings from Nile Tilapia (Oreochromis niloticus), at the experimental infection by Edwardsiella tarda, two experiments were performed. Each experiment was composed by four distinct groups: those belonging to groups 1 and 4 received only commercial diet featuring about 300 mg of vitamin C per kilogram of feed, while the animals belonging to groups 2 and 3 received the same diet supplemented with 1,500 mg and 3,000 mg, respectively, of vitamin C (Lutavit® C Monophosphate BASF) per kilogram of feed. In the first experiment the animals received the diet for 14 consecutive days, being infected on the 15th day, while in the second experiment the animals were infected by the bacterial suspension after an interval of more 14 days after the same period of supplementation with vitamin C. The results showed that although there isnt a significant difference (p > 0,05) with respect to the concentrations of vitamin C, however the interval between the end of supplementation with megadoses of vitamin C in the diet (Nutripeixe AL55 PURINA) and bacterial exposure showed significant difference (p 0,05) on the experimental infection with E. tarda in fingerlings of Nile Tilapia (O. niloticus).


RESUMO Objetivando avaliar o efeito da suplementação com megadoses de vitamina C na dieta de alevinos de Tilápia do Nilo ( Oreochromis niloticus), frente à infecção experimental por Edwardsiella tarda, foram realizados dois experimentos. Cada experimento foi composto por quatro grupos distintos: aqueles pertencentes aos grupos 1 e 4 receberam apenas ração comercial apresentando cerca de 300 mg de vitamina C por quilo de ração, enquanto os animais pertencentes aos grupos 2 e 3 receberam a mesma ração suplementada com 1.500 mg e 3.000 mg, respectivamente, de vitamina C (Lutavit® C Monophosphate BASF) por quilo de ração. No primeiro experimento os animais receberam a dieta durante 14 dias consecutivos, sendo desafiados no 15º dia, enquanto no segundo experimento os animais só foram desafiados pela suspensão bacteriana após um intervalo de mais 14 dias findo o mesmo período de suplementação com vitamina C. Os resultados mostraram que, embora não haja diferença significativa (p > 0,05) com relação às concentrações de vitamina C, o intervalo entre o final do período de suplementação com megadoses de vitamina C na ração (Nutripeixe AL55 PURINA) e a exposição à suspensão bacteriana apresentou diferença significativa (p 0,05) sobre a infecção experimental com E. tarda em alevinos de Tilápia do Nilo (O. niloticus).

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