Rota vírus do grupo a em bezerros lactentes no estado de Minas Gerais

Barbosa, Edel Figueiredo; Figueiredo, Henrique César Pereira; García, Aurora Fernández; Lobato, Zélia Inês Portela; Lage, Andrey Pereira

doi:10.1590/s0103-84781998000300014

Cited by 9 publications

(7 citation statements)

References 11 publications

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“…Most studies on the gpA BRV frequency in calves from Brazilian cattle herds were carried out in specific geographical regions and with relatively small samples (Jerez et al, 1987;Barbosa et al, 1998;Buzinaro et al, 2000Buzinaro et al, , 2003Alfieri et al, 2004;Brito, 1994). The present study examined the presence of BRV over a 5-year period (1998)(1999)(2000)(2001)(2002) in several Brazilian states from different geographical regions.…”

Section: Discussionmentioning

confidence: 99%

Frequency of group A rotavirus in diarrhoeic calves in Brazilian cattle herds, 1998–2002

Alfieri

Parazzi

Takiuchi

et al. 2006

Trop Anim Health Prod

162

125

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The frequency of group A bovine rotavirus (gpA BRV) in calves from 1998 to 2002 was determined by the polyacrylamide gel electrophoresis technique in 2177 faecal samples, of which 1898 samples were diarrhoeic and 279 were of normal consistency (control group) that were collected from asymptomatic calves for comparative purposes. The animals were from beef and dairy cattle herds (n = 321) from 158 counties in seven States (Paraná, São Paulo, Minas Gerais, Mato Grosso do Sul, Mato Grosso, Goiás and Rondônia) and four Brazilian geographical regions (south, south-east, centre-west, and north). GpA BRV was detected in 19.4% (369/1898; p = 0.0001) of the samples collected in calves with diarrhoea and in only 2.2% (6/279; p = 0.0001) of the faeces with normal consistency. The proportion of positive samples collected from beef and dairy cattle herds was 22.8% (205/899; p = 0.0001) and 16.4% (169/999; p = 0.0005), respectively. In relation to age, a higher prevalence of infections was found in calves up to 30 days old, where 33.0% (189/573; p = 0.0001) and 20.2% (138/683; p = 0.0001) of the diarrhoeic faecal samples from beef and dairy cattle herds, respectively, were positive for gpA BRV. These results show the possible importance of inclusion of gpA BRV in the management of neonatal calf diarrhoea in Brazilian cattle herds.

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Section: Discussionmentioning

confidence: 99%

Frequency of group A rotavirus in diarrhoeic calves in Brazilian cattle herds, 1998–2002

Alfieri

Parazzi

Takiuchi

et al. 2006

Trop Anim Health Prod

162

125

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“…Stool samples were diluted in Tris-HCl CaCl2 buffer as previously described (Barbosa et al 1998). RNA was extracted using the phenol-chloroform method (Theil et al, 1981;Sambrook et al, 1989).…”

Section: Rotavirusmentioning

confidence: 99%

A surveillance of enteropathogens in piglets from birth to seven days of age in Brazil

et al. 2013

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The purpose of the study was to evaluate the real importance of anaerobic enteropathogens and rotavirus in contrast to more common agents as cause of diarrhea in piglets within the first week of life. Sixty 1-to 7-day-old piglets, 30 diarrheic and 30 non-diarrheic (control), from 15 different herds were selected, euthanized and necropsied. Samples of the jejunum, ileum, colon, cecum and feces were collected from the piglets and analyzed to determine the presence of the following enteropathogens: enterotoxigenic Escherichia coli (ETEC), Clostridium perfringens types A and C, Clostridium difficile, rotavirus and Isospora suis. Among diarrheic piglets, 23.3% were positive for C. difficile, 70% for C. perfringens type A cpb2+, 14.3% for rotavirus and 10% for ETEC. Among non-diarrheic control piglets, 10% were positive for C. difficile, 76.7% for C. perfringens type A cpb2+, 0% for rotavirus, 3.3% for ETEC and 3.3% for I. suis. C. perfringens type C was not detected in any of the animals. Histological lesions characteristic of C. difficile, E. coli and rotavirus were observed. However, no C. perfringens type A suggestive lesions were detected. There was a positive correlation between mesocolon edema and the presence of C. difficile toxins. Although C. perfringens type A cpb2+ was the most frequently detected enteropathogen, there was no association between its presence and diarrhea or macro or microscopic changes. C. difficile and Rotavirus were the most relevant pathogens involved with neonatal diarrhea in this study, and histopathology associated with microbiological test proved to be the key to reach a final diagnosis. com lesões foi encontrada. C. difficile e Rotavirus foram os agentes mais relevantes associados à diarreia neonatal, e ficou demonstrada a relevância de associação de histopatologia com testes de detecção microbiológica para se firmar um diagnóstico.

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“…No Brasil, vários estudos detectaram rotavírus em bezerros leiteiros com diarréia (Alves 1997, Barbosa et al 1998, Jerez et al 2002. Entretanto, são escassos os relatos nacionais da participação do agente na etiologia da diarréia em bezerros de corte.…”

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“…A diarréia em bezerros da raça Nelore é considerada a principal causa de perdas econômicas em rebanhos de corte em vários Estados do Brasil (Barbosa et al 1998, Benesi 1999, Mota et al 2000.…”

Section: Introdução Introdução Introdução Introdução Introduçãounclassified

Diarréia em bezerros da raça Nelore criados extensivamente: estudo clínico e etiológico

Filho

Silva

Pacheco³

et al. 2007

Pesq. Vet. Bras.

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A diarréia é considerada uma das principais causas de morbidade e mortalidade de bezerros neonatos. Foram colhidas 100 amostras fecais diarréicas e 30 amostras não diarréicas (grupo controle), de bezerros Nelore com até nove semanas de idade com o objetivo de detectar os enteropatógenos Salmonella spp., Escherichia coli, rotavírus, coronavírus, Cryptosporidium spp. e ovos de helmintos. Enteropatógenos foram detectados em 79,0% das amostras diarréicas e em 70,0% das amostras não-diarréicas. No grupo de bezerros com diarréia, E. coli (69,0%) foi o agente mais freqüentemente isolado, seguido de Cryptosporidium spp. (30,0%), coronavírus (16,0%) e rotavírus (11,0%). No grupo controle, E. coli, Cryptosporidium spp. e coronavírus foram detectados, respectivamente, em 66,7%, 10,0% e 3,3% das amostras. Salmonella spp. e ovos de estrongilídeos não foram encontrados nos dois grupos avaliados. A fímbria K99 foi identificada exclusivamente nas linhagens de E. coli isoladas de bezerros com diarréia (5,8%). Entre os antimicrobianos avaliados "in vitro" a enrofloxacina, a norfloxacina e a gentamicina foram os mais efetivos. O peso dos bezerros aos 210 dias de idade não apresentou diferença significativa entre os animais com e sem diarréia.

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Rota vírus do grupo a em bezerros lactentes no estado de Minas Gerais

Cited by 9 publications

References 11 publications

Frequency of group A rotavirus in diarrhoeic calves in Brazilian cattle herds, 1998–2002

Frequency of group A rotavirus in diarrhoeic calves in Brazilian cattle herds, 1998–2002

A surveillance of enteropathogens in piglets from birth to seven days of age in Brazil

Diarréia em bezerros da raça Nelore criados extensivamente: estudo clínico e etiológico

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