Helicobacter spp. and gastric lesions association in minipigs / Associação entre Helicobacter spp. e lesões gástricas em minipigs

Due to their similarity to humans, studies regarding gastric ulcers in pigs have become of great interest. It is known that Helicobacter spp. is related to the occurrence of these ulcers, as they possess a high prevalence in pigs. This study aimed to associate gastric lesions findings naturally occurring in minipigs related to or not related to the presence of Helicobacter spp., through the ultra-rapid urease test and immunohistochemical analysis, reaffirming the disease in swine as a natural biomedical model for human cases. For this, samples of formalin-fixed paraffin-embedded gastric tissues from 40 minipigs were obtained at the Laboratório de Morfologia e Patologia Animal (LMPA) in the Universidade Estadual do Norte Fluminense (UENF). Regarding the ultra-rapid urease test, no animal was positive in all regions. However, 18 were positive in at least one: six (15%) were positive in the aglandular region, eight (20%) in the antrum region, 13 (32.5%) in the region of the cardiac gland, and one (2.5%) in the region of the fundic gland. Regarding immunohistochemical analysis, only one animal was positive in all regions, and 32 animals were positive in at least one: four (10%) were positive in the aglandular region, 10 (25%) in the antrum region, 23 (57.5%) in the region of the cardiac gland, and three (7.5%) in the region of the fundic gland. The gastric lesion findings showed a close relationship with Helicobacter spp., enriching the laboratory animal pathologies list. The immunostaining of the bacteria not associated with gastric lesions in certain regions demonstrated the saprophytic and opportunisitic nature of Helicobacter.(AU)

Por sua semelhança com a da espécie humana, a úlcera gástrica nos suínos tem despertado muito interesse. Sabe-se que o Helicobacter spp. está relacionado à ocorrência dessas úlceras, apresentando alta prevalência. Este estudo teve como objetivo associar as lesões gástricas, de ocorrência natural em miniporcos, à presença, ou não, de Helicobacter spp., por meio do teste ultra-rápido da urease e da análise imunohistoquímica, reafirmando a enfermidade em suínos como modelo biomédico natural para os casos em humanos. Para este fim, foram utilizados histossetes de tecido gástrico de 40 minipigs obtidos no Laboratório de Morfologia e Patologia Animal (LMPA) da Universidade Estadual do Norte Fluminense (UENF). Em relação ao teste ultra-rápido da urease, nenhum animal foi positivo em todas as regiões, entretanto, 18 foram positivos em pelo menos uma: seis foram positivos na região aglandular, oito na região do antro, 13 na região das glândulas cárdicas e um na região das glândulas fúndicas. Em relação à análise imuno-histoquímica, somente um animal foi positivo em todas as regiões e 32 animais foram positivos em pelo menos uma: quatro foram positivos na região aglandular, 10 na região do antro, 23 na região das glândulas cárdicas e três na região das glândulas fúndicas. As lesões gástricas demonstraram estreita relação com o Helicobacter spp. em miniporcos, enriquecendo a lista de patologias de animais de laboratório. A imunomarcação da bactéria não associada à lesão, em certas regiões gástricas, demonstra seu caráter saprofítico e oportunista.(AU)

Associação de alterações anatomopatológicas com o Helicobacter spp. por meio de análise imuno-histoquímica em estômagos de leitões / Association of anatomopathological changes with the Helicobacter spp. through immunohistochemical analysis in piglets stomachs

O objetivo deste trabalho foi relacionar os achados anatomopatológicos das lesões gástricas subclínicas de ocorrência natural em leitões com a presença, ou não, de Helicobacter spp. por meio da imuno-histoquímica. Foram utilizados 48 leitões de linhagem genética comercial. Os animais foram adquiridos em uma granja comercial, com peso médio de 34 Kg e idade média de 79 dias; após o abate, seus estômagos foram coletados e avaliados. Avaliações histopatológicas e imuno-histoquímicas foram realizadas em amostras das regiões anatômicas aglandular e glandular. Macroscopicamente, 34 (70,83%) leitões apresentaram lesões na região aglandular, enquanto que em 14 animais (29,17%) não foram encontradas alterações nesta região. Dos estômagos com lesão, 14 foram classificados como grau 1, seis como grau 2 e 14 como grau 3. Microscopicamente, 44 amostras (91,66%) apresentaram paraqueratose. Deste total, 22 apresentaram a forma discreta, 20 a moderada e dois a acentuada. Na avaliação macroscópica da porção glandular, 41 (85,4%) animais apresentaram alteração em pelo menos uma das três regiões, e em somente sete (14,6%) não foram encontradas lesões em nenhuma delas. Em 14 deles, houve aumento da atividade mucípara, em dois, houve erosão e, em cinco, hiperemia. As lesões na região glandular do estômago foram mais extensas no antro e no cárdia, seguidas do fundo. Em relação à análise imuno-histoquímica, 21 (43,8%) amostras tiveram resultados negativos em todas as regiões, e 24 (50%) foram positivas em pelo menos uma delas, sendo que nenhuma foi positiva em todas. Os achados anatomopatológicos demonstraram relação estatística com a bactéria e, sua imunomarcação não associada à lesão em certas regiões gástricas, demonstra seu caráter saprofítico e oportunista.

The aim of this study was to relate the anatomopathological findings of naturally occurring subclinical gastric lesions in piglets, with or without Helicobacter spp. through immunohistochemistry. Forty-eight piglets of commercial genetic lineage were used. The animals were acquired in a commercial farm, with an average weight of 34 kg and an average age of 79 days, and after slaughter, their stomachs were collected and evaluated. Samples from the glandular and aglandular anatomical regions were evaluated. Macroscopically, 34 (70.83%) samples had lesions on aglandular region, while 14 (29.17%) nothing had. Of the injured stomachs, 14 were classified as grade 1, six as grade 2 and 14 as grade 3. Microscopically, 44 samples (91.66%) showed parakeratosis. Of these, 22 showed a discreet manner, 20 moderate and two severe. In the glandular region, in 41 (85.4%) samples there was a change in at least one of the three regions, and only seven animals (14.6%) showed no change in any of the three. Fourteen samples showed increased muciparous activity, two showed erosion and five hyperemia. The lesions were higher in antral regions and cardic, followed the fundus. In relation to immunohistochemistry, 21(43.8%) samples were negative in all areas, 24 (50%) were positive in at least one, and none were positive in all. The anatomopathological findings showed a statistical relationship with the bacteria, and its immunostaining, not associated with gastric lesions in certain regions, demonstrates its saprophytic and opportunistic character.

Correlation between different Helicobacter morphotypes and histological changes in pig gastric mucosa

Background: Two distinct morphologic types of bacteria which belong to the Helicobacter species, have been described in pigs: once or twice curved Helicobacter pylori-like bacteria (HLO) and the multicoiled, Gastrospirillum-like bacteria (GLO). The objective of this study was to determine the incidence of Helicobacter spp. using modified Giemsa stain and to define the relationship between presence of Helicobacter spp. and histopathological changes of gastric mucosa in pigs.Materials, Methods & Results: A total of 120 pig stomachs (60 from intensive and 60 from extensive breeding) were enrolled in this study and 240 fragments of fundic and pyloric mucosa were taken for histopathological examination. By modified Giemsa staining of gastric mucosa, Helicobacter-like organisms were confirmed in 4/60 (6.67%) of pigs in intensive and 5/60 (8.33%) of pigs in extensive breeding. The incidence of tightly spiral shaped Gastrospirillum-like organisms in pigs of intensive and extensive breeding were 5/60 (8.33%) and 9/60 (15%), respectively. The severity of gastritis was scored to the Sydney System with some modifications. There was no significant difference between HLO-positive and HLO-negative fundic mucosa in pigs of both breeding systems. In contrary, there was significant difference between HLO-positive and HLO-negative pyloric mucosa of pigs in intensive (P < 0.001) and in extensive breeding (P < 0.05). In intensive breeding, there was significant difference between GLO-positive and GLO-negative fundic mucosa (P < 0.05), while there was no significant difference between GLO-positive and GLO-negative pyloric mucosa.Discussion: The prevalence of Helicobacter spp. bacteria were in coherence with literature data. The higher prevalence of both morfological type of bacteria, were considered in pigs in extensive breeding. the hygienic conditions and managment factors in pigs farm are the possible impact for higher bacterial transmission.[...]

Correlation between different Helicobacter morphotypes and histological changes in pig gastric mucosa

Background: Two distinct morphologic types of bacteria which belong to the Helicobacter species, have been described in pigs: once or twice curved Helicobacter pylori-like bacteria (HLO) and the multicoiled, Gastrospirillum-like bacteria (GLO). The objective of this study was to determine the incidence of Helicobacter spp. using modified Giemsa stain and to define the relationship between presence of Helicobacter spp. and histopathological changes of gastric mucosa in pigs.Materials, Methods & Results: A total of 120 pig stomachs (60 from intensive and 60 from extensive breeding) were enrolled in this study and 240 fragments of fundic and pyloric mucosa were taken for histopathological examination. By modified Giemsa staining of gastric mucosa, Helicobacter-like organisms were confirmed in 4/60 (6.67%) of pigs in intensive and 5/60 (8.33%) of pigs in extensive breeding. The incidence of tightly spiral shaped Gastrospirillum-like organisms in pigs of intensive and extensive breeding were 5/60 (8.33%) and 9/60 (15%), respectively. The severity of gastritis was scored to the Sydney System with some modifications. There was no significant difference between HLO-positive and HLO-negative fundic mucosa in pigs of both breeding systems. In contrary, there was significant difference between HLO-positive and HLO-negative pyloric mucosa of pigs in intensive (P < 0.001) and in extensive breeding (P < 0.05). In intensive breeding, there was significant difference between GLO-positive and GLO-negative fundic mucosa (P < 0.05), while there was no significant difference between GLO-positive and GLO-negative pyloric mucosa.Discussion: The prevalence of Helicobacter spp. bacteria were in coherence with literature data. The higher prevalence of both morfological type of bacteria, were considered in pigs in extensive breeding. the hygienic conditions and managment factors in pigs farm are the possible impact for higher bacterial transmission.[...](AU)

Prevalência de Helicobacter spp. em cães de Campo Grande-MS / Prevalence of Helicobacter spp. in dogs from Campo Grande-MS

Helicobacter spp. is a spiral Gram-negative bacterium that has substantial clinical importance. It has been related to diseases such as gastritis and peptic ulcers, and more recently to gastric cancer in humans. Evidence suggests the potential of animals, particularly domestic ones, as the source of zoonotic infection of helicobacteria since bacteria with similar morphology to those found in animals were observed in the stomach of humans with gastritis. Thus, dogs have been identified to serve as an important host for infectious agents such as Helicobacter spp. From this perspective, the present study aimed to assess the prevalence of Helicobacter spp. in dogs from the Zoonosis Control Center of Campo Grande-MS. Samples of body, fundus, and gastric antrum from 96 dogs were collected to evaluate the presence of Helicobacter spp. through the rapid urease test and histological analysis. Helicobacter spp. was found in 94.7% of the dogs by rapid urease test and in 100% by histological analysis, with bacteria predominance in the stomach fundus region.

A Helicobacter spp. é uma bactéria Gram negativa espiralada, de grande importância clínica, que se relaciona a patogenias como gastrite e úlceras pépticas e, mais recentemente, com o carcinoma gástrico em humanos. Evidências sugerem o potencial dos animais, principalmente os domésticos, como fonte de infecção zoonótica das helicobactérias, já que bactérias com morfologia similar às encontradas em animais foram observadas no estômago de humanos com gastrite. Nesse contexto, os cães podem ser um importante reservatório de agentes infecciosos como a Helicobacter spp. O presente trabalho teve como objetivo avaliar a prevalência de Helicobacter spp. em cães do Centro de Controle de Zoonoses de Campo Grande/MS. Para tanto, foram utilizados 96 cães dos quais foram colhidas amostras do corpo, fundo e antro gástrico, para avaliação da presença da Helicobacter spp. por meio do teste rápido de urease e análise histológica. O teste rápido de urease permitiu a detecção deHelicobacter spp. em 94,7% dos cães; já a análise histológica indicou a presença de Helicobacter spp. em 100% dos animais avaliados com predomínio da bactéria na região do fundo do estômago.

Prevalência de Helicobacter spp. em cães de Campo Grande-MS / Prevalence of Helicobacter spp. in dogs from Campo Grande-MS

Helicobacter spp. is a spiral Gram-negative bacterium that has substantial clinical importance. It has been related to diseases such as gastritis and peptic ulcers, and more recently to gastric cancer in humans. Evidence suggests the potential of animals, particularly domestic ones, as the source of zoonotic infection of helicobacteria since bacteria with similar morphology to those found in animals were observed in the stomach of humans with gastritis. Thus, dogs have been identified to serve as an important host for infectious agents such as Helicobacter spp. From this perspective, the present study aimed to assess the prevalence of Helicobacter spp. in dogs from the Zoonosis Control Center of Campo Grande-MS. Samples of body, fundus, and gastric antrum from 96 dogs were collected to evaluate the presence of Helicobacter spp. through the rapid urease test and histological analysis. Helicobacter spp. was found in 94.7% of the dogs by rapid urease test and in 100% by histological analysis, with bacteria predominance in the stomach fundus region.(AU)

A Helicobacter spp. é uma bactéria Gram negativa espiralada, de grande importância clínica, que se relaciona a patogenias como gastrite e úlceras pépticas e, mais recentemente, com o carcinoma gástrico em humanos. Evidências sugerem o potencial dos animais, principalmente os domésticos, como fonte de infecção zoonótica das helicobactérias, já que bactérias com morfologia similar às encontradas em animais foram observadas no estômago de humanos com gastrite. Nesse contexto, os cães podem ser um importante reservatório de agentes infecciosos como a Helicobacter spp. O presente trabalho teve como objetivo avaliar a prevalência de Helicobacter spp. em cães do Centro de Controle de Zoonoses de Campo Grande/MS. Para tanto, foram utilizados 96 cães dos quais foram colhidas amostras do corpo, fundo e antro gástrico, para avaliação da presença da Helicobacter spp. por meio do teste rápido de urease e análise histológica. O teste rápido de urease permitiu a detecção deHelicobacter spp. em 94,7% dos cães; já a análise histológica indicou a presença de Helicobacter spp. em 100% dos animais avaliados com predomínio da bactéria na região do fundo do estômago.(AU)

Incidência e aspectos histopatológicos da infecção por Helicobacter spp. em gatos da Cidade de Recife, Pernambuco, Brasil. / Incidence and pathological aspects of infection by Helicobacter spp. in cats from the city of Recife, Pernambuco, Brazil

O presente trabalho objetivou investigar a prevalência da bactéria Helicobacter spp. em gatos da Cidade do Recife, Pernambuco. As amostras de estômagos analisadas foram colhidas de 119 gatos sem raça e idade definida, sendo 56 machos e 63 fêmeas. Para pesquisa de Helicobacter spp., foram realizados os métodos de teste rápido da urease e exames histopatológicos. As análises pelo teste rápido da urease mostraram que em 82,35% das amostras foi detectada reação positiva para Helicobacter. Na análise histopatológica, verificou-se que em 59,66% das amostras (71/119) apresentaram lesões. Essas lesões consistiram em infiltrado linfoplasmocitário com folículo linfoide, microabcessos, necrose, hipotrofia; em 40,34% das amostras (48/119) não foram observadas alterações histológicas. Conclui-se que gatos oriundos da Cidade de Recife, Pernambuco< apresentam alta incidência de infecção por Helicobacter spp. Infiltrado difuso de células linfoplasmocitárias foram as alterações histopatológicas mais frequentes observadas na mucosa gástrica de gatos infectados por Helicobacter spp. (AU)

INCIDENCE AND PATHOLOGICAL ASPECTS OF INFECTION BY HELICOBACTER SPP. IN CATS FROM THE CITY OF RECIFE, PERNAMBUCO, BRAZIL. The present study aimed to investigate the incidence of the bacterium Helicobacter spp. in cats from Recife, Pernambuco State, Brazil. Stomach samples were collected from 119 cats, without distinction between race or age, the breakdown by sex being 56 males and 63 females. The urease quick test and histopathological examination using both hematoxilin-eosin (HE) and Giemsa stain were performed. The urease quick test showed positive results for Helicobacter in 82.35% of the samples. The histopathology revealed an alteration in 59.66% (71/119) of the samples, such as lymphoplasmocitic infiltration with a lymphoid foliculum, microabscess, necrosis, and hypotrophy, while in 40.34% of the samples (48/119) no alterations were observed. It was concluded that the cats from the city of Recife, State of Pernambuco, Brazil, presented a high incidence of infection with Helicobacter spp. Diffuse infiltrate of lymphocytes cells was the most frequent histopathological change observed in the gastric mucosa of cats infected with Helicobacter spp. (AU)

Incidência e aspectos histopatológicos da infecção por Helicobacter spp. em gatos da Cidade de Recife, Pernambuco, Brasil / Incidence and pathological aspects of infection by Helicobacter spp. in cats from the city of Recife, Pernambuco, Brazil

O presente trabalho objetivou investigar a prevalência da bactéria Helicobacter spp. em gatos da Cidade do Recife, Pernambuco. As amostras de estômagos analisadas foram colhidas de 119 gatos sem raça e idade definida, sendo 56 machos e 63 fêmeas. Para pesquisa de Helicobacter spp., foram realizados os métodos de teste rápido da urease e exames histopatológicos. As análises pelo teste rápido da urease mostraram que em 82,35% das amostras foi detectada reação positiva para Helicobacter. Na análise histopatológica, verificou-se que em 59,66% das amostras (71/119) apresentaram lesões. Essas lesões consistiram em infiltrado linfoplasmocitário com folículo linfoide, microabcessos, necrose, hipotrofia; em 40,34% das amostras (48/119) não foram observadas alterações histológicas. Conclui-se que gatos oriundos da Cidade de Recife, Pernambuco< apresentam alta incidência de infecção por Helicobacter spp. Infiltrado difuso de células linfoplasmocitárias foram as alterações histopatológicas mais frequentes observadas na mucosa gástrica de gatos infectados por Helicobacter spp.

INCIDENCE AND PATHOLOGICAL ASPECTS OF INFECTION BY HELICOBACTER SPP. IN CATS FROM THE CITY OF RECIFE, PERNAMBUCO, BRAZIL. The present study aimed to investigate the incidence of the bacterium Helicobacter spp. in cats from Recife, Pernambuco State, Brazil. Stomach samples were collected from 119 cats, without distinction between race or age, the breakdown by sex being 56 males and 63 females. The urease quick test and histopathological examination using both hematoxilin-eosin (HE) and Giemsa stain were performed. The urease quick test showed positive results for Helicobacter in 82.35% of the samples. The histopathology revealed an alteration in 59.66% (71/119) of the samples, such as lymphoplasmocitic infiltration with a lymphoid foliculum, microabscess, necrosis, and hypotrophy, while in 40.34% of the samples (48/119) no alterations were observed. It was concluded that the cats from the city of Recife, State of Pernambuco, Brazil, presented a high incidence of infection with Helicobacter spp. Diffuse infiltrate of lymphocytes cells was the most frequent histopathological change observed in the gastric mucosa of cats infected with Helicobacter spp.

Triagem de Helicobacter spp. em fezes de roedores de laboratório através da técnica de PCR / / Screening for Helicobacter spp inrodent feces laboratory using PCR technique

Este trabalho tem como objetivo otimizar a triagem da bactéria Helicobacter spp em programa de controle sanitário de animais de laboratório, aplicando a técnica de PCR (Polymerase Chain Reaction). Cinquenta amostras de fezes de cada linhagem ou espécie: camundongo C57BL/6, BALB/c, Swiss; ratos Wistar e Hamster foram submetidas à reação de PCR, utilizando os oligonucleotídeos iniciadores F: 5’ CTATGACGGGTATCCGGC 3' E R: 5' ATTCCACCTACCTCTCCCA 3' que amplificam um produto de 374 Este trabalho tem como objetivo otimizar a triagem da bactéria Helicobacter spp em programa de controle sanitário de animais de laboratório, aplicando a técnica de PCR (Polymerase Chain Reaction). Cinquenta amostras de fezes de cada linhagem ou espécie: camundongo C57BL/6, BALB/c, Swiss; ratos Wistar e Hamster foram submetidas à reação de PCR, utilizando os oligonucleotídeos iniciadores F: 5’ CTATGACGGGTApb. Separados por eletroforese em gel de agarose, os produtos foram visualizados e fotodocumentados sob luz ultravioleta.A técnica de PCR possibilitou a detecção de camundongos positivos, sendo 18% da linhagem C57BL/6, 52% da linhagem BALB/c, 62% da linhagem Swiss. Em ratos da linhagem Wistar, foram detectados 28% de positividade e em hamster, 44%. Esses resultados sugerem que a técnica de PCR empregada foi eficaz para a triagem de Helicobacter spp em colônias de animais de laboratório. Certificado CEAU nº 251/11 HCFMUSP.

This work aimed to optimize the screening of the bacterium Helicobacter spp in sanitary control program of laboratory animals, using the PCR (Polymerase Chain Reaction). Fifty stool samples from each strain or species: C57BL/6, BALB/c, Swiss, Hamster and Wistar rats were subjected to PCR using the primers F: 5’ CTATGACGGGTATCCGGC 3' and R: 5' ATTCCACCTACCTCTCCCA 3' that amplofy 374 bp product. Separated by agarose gel electrophoresis, products were visualized and photographed under ultraviolet light. The PCR technique allowed the detection of positive mice, 18% of C57BL/6, 52% of the strain BALB/c, 62% of Swiss strain. In Wistar rats were detected 28% ´possivity and hamster 44%. These results suggest that the PCR technique used was effective in screening for Helicobacter spp in colonies of laboratory animals. Certified CRAU Nº 251/11 HCFMUSP.

Triagem de Helicobacter spp. em fezes de roedores de laboratório através da técnica de PCR / / Screening for Helicobacter spp inrodent feces laboratory using PCR technique

Este trabalho tem como objetivo otimizar a triagem da bactéria Helicobacter spp em programa de controle sanitário de animais de laboratório, aplicando a técnica de PCR (Polymerase Chain Reaction). Cinquenta amostras de fezes de cada linhagem ou espécie: camundongo C57BL/6, BALB/c, Swiss; ratos Wistar e Hamster foram submetidas à reação de PCR, utilizando os oligonucleotídeos iniciadores F: 5 CTATGACGGGTATCCGGC 3' E R: 5' ATTCCACCTACCTCTCCCA 3' que amplificam um produto de 374 Este trabalho tem como objetivo otimizar a triagem da bactéria Helicobacter spp em programa de controle sanitário de animais de laboratório, aplicando a técnica de PCR (Polymerase Chain Reaction). Cinquenta amostras de fezes de cada linhagem ou espécie: camundongo C57BL/6, BALB/c, Swiss; ratos Wistar e Hamster foram submetidas à reação de PCR, utilizando os oligonucleotídeos iniciadores F: 5 CTATGACGGGTApb. Separados por eletroforese em gel de agarose, os produtos foram visualizados e fotodocumentados sob luz ultravioleta.A técnica de PCR possibilitou a detecção de camundongos positivos, sendo 18% da linhagem C57BL/6, 52% da linhagem BALB/c, 62% da linhagem Swiss. Em ratos da linhagem Wistar, foram detectados 28% de positividade e em hamster, 44%. Esses resultados sugerem que a técnica de PCR empregada foi eficaz para a triagem de Helicobacter spp em colônias de animais de laboratório. Certificado CEAU nº 251/11 HCFMUSP. (AU)

This work aimed to optimize the screening of the bacterium Helicobacter spp in sanitary control program of laboratory animals, using the PCR (Polymerase Chain Reaction). Fifty stool samples from each strain or species: C57BL/6, BALB/c, Swiss, Hamster and Wistar rats were subjected to PCR using the primers F: 5 CTATGACGGGTATCCGGC 3' and R: 5' ATTCCACCTACCTCTCCCA 3' that amplofy 374 bp product. Separated by agarose gel electrophoresis, products were visualized and photographed under ultraviolet light. The PCR technique allowed the detection of positive mice, 18% of C57BL/6, 52% of the strain BALB/c, 62% of Swiss strain. In Wistar rats were detected 28% ´possivity and hamster 44%. These results suggest that the PCR technique used was effective in screening for Helicobacter spp in colonies of laboratory animals. Certified CRAU Nº 251/11 HCFMUSP.(AU)

Detecção de Helicobacter spp. em amostras de mucosa gástrica de cães assintomáticos e alterações histológicas associadas / Identification of Helicobacter spp. in gastric mucosa samples asymptomatic dogs and associate histological alterations

O presente estudo teve por objetivo correlacionar o número de bactérias espiraladas e as alterações histológicas da mucosa gástrica em cães de vida livre. Foram analisadas biopsias gástricas endoscópicas de 28 cães assintomáticos. Para análise histológica, foi realizada avaliação qualitativa, onde foram atribuídos escores de 0 a 3, considerando a densidade de bactérias espiraladas por campo (400x), a presença de células inflamatórias, o número de agregados linfoides e a existência de alteração degenerativa glandular. A prevalência de Helicobacter spp, identificado pela histologia (Carbol-Fucscina) e positividade no teste da urease, foi de 100%. Dos 28 cães, 18 (64,3%) receberam escore 3 e 10 (35,7%) o escore 2 para a densidade de bactérias. O infiltrado inflamatório predominantemente linfoplasmocitário foi de grau leve (escore 1) em 17 (60,7%) cães e moderado em 6 (21,4%) cães. Dos 28 cães, 14 (50%) receberam escore 1 para degeneração glandular e 9 (32,1%), o escore 0. As regiões do corpo e antro apresentaram maior número de resultados positivos à histopatologia. Apesar do número elevado de bactérias encontrado nas amostras analisadas, as alterações histológicas foram classificadas como de grau leve na maioria dos animais. A presença do Helicobacter spp. não parece estar relacionado com sintomatologia de gastrite.(AU)

The objective of the present study was to establish a relationship between the number of spiral bacteria and gastric mucosa histological alterations in mongrel dogs. Endoscopic biopsies of 28 asymptomatic dogs were analyzed. Qualitative evaluation was performed for histological analysis, in which scores from 0 to 3 were attributed, considering the density of spiral bacteria per field (400x), presence of inflammatory cells, number of lymphoid aggregates and existence of gland degenerative alteration. The prevalence of Helicobacter spp., identified by hystological technique (Carbol fuchsine) and positive urease test, was100%. Eighteen (64.3%) of the 28 dogs presented score 3, and 10 (35.7%0), score 2 for the density of bacteria. The inflammatory infiltrate, predominantly lymphocytic, was slight (score 1) in 17dogs (60.7%) and moderate in 6 (21.4%). From the 28 dogs, 14 (50%) scored 1 for glandular degeneration and 9 (32.1%) scored 0. The body and antrum regions presented the highest positive result to histopathology. Despite the high number of bacteria found in the analyzed samples, the histological alterations have been classified as slight in most of the animals. The presence of Helicobacter spp. apparently does not produces gastritis symptoms.(AU)

Prevalência de helicobactérias e alterações na mucosa gástrica de cães saudáveis / Prevalence of helicobacters and alterations in gastric mucosa of healthy dogs

Prevalence, distribution and density of gastric helicobacter colonization were determined in 50 healthy dogs, characterizing the macroscopic and microcospic aspects of their mucosa. Helicobacter prevalence was 96 percent, with greater distribution in the gastric fundus and body. Although the presence of macroscopic alterations was high (58 percent), it was characterized as mild due to the predominance of less severe ones (65.5 percent). High prevalence of mostly monoclear cell infriltate (64.7 percent) was noted. Association between the presence of helicobacter and macro and microscopic alterations was not observed(AU)