Contribution to the study of diarrhea etiology in neonate dairy calves in São Paulo state, Brazil
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Data
2004-10-01
Autores
Langoni, Hélio [UNESP]
Linhares, Antonio Carlos
Ávila, Fernando Antonio de [UNESP]
Silva, Aristeu Vieira da [UNESP]
Elias, Acacia Orieth [UNESP]
Título da Revista
ISSN da Revista
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Editor
Universidade de São Paulo (USP), Faculdade de Medicina Veterinária e Zootecnia (FMVZ)
Resumo
Amostras fecais de 203 bezerros com diarréia, idade inferior a 30 dias, de ambos os sexos e de diferentes propriedades do Estado de São Paulo foram examinadas num período de dois anos. Cultivos para pesquisa bacteriana foram feitos em agar acrescido de 10% de sangue bovino e agar Levine. As placas foram incubadas por até 96 horas, em condições aeróbias, a 37°C, com observação dos aspectos de colônia e estudos morfológicos, bioquímicos e realização de outros testes, quando pertinentes. O teste de ELISA foi aplicado para pesquisa de Rotavirus. Cryptosporidium spp. também foi pesquisado e identificado. Resultados revelaram envolvimento de vários patógenos de forma isolada, assim como associados. Rotavirus foi encontrado em 51 (25,1%) das amostras, sendo em 58,8% só, em 41.7% associado a outros microrganismos. Cryptosporydium spp foi isolado em 43 (21.3%) das amostras, sendo só em 65,1% delas e associado a outros enteropatógenos em 34,9%. No exame parasitológico foram encontrados ovos de estrongilídeos em 5 (2,5%) das amostras, não excedendo mais de dois ovos por campo examinado. Ao exame microbiológico, um ou mais microrganismos foram isolados. Escherichia coli foi encontrada em 100% das amostras. As pesquisas de toxina termoestável e do antígeno de aderência K99 realizada nas 73 amostras de E.coli foram negativas, e o grupo sorológico das mesmas foi determinado, sendo 34,2%, 17,8% e 47,9% das amostras pertencentes aos sorogrupos O8, O11 e O101, respectivamente. Salmonella Dublin e Salmonella typhimurium foram isoladas em 5,4% e 6,1% das amostras examinadas, respectivamente.
Two hundred and three samples of feces of calves aged less than 30 days old from both sexes and from different properties and regions of the state of São Paulo were examined in the period of two years. Bacterial cultures were carried out in bovine 10% bloodagar and Levine mediums, incubated for up to 96 hours in aerobic conditions at 37°C, with the observation of colonies and morphological and biochemical study to characterize isolated microorganisms, or other tests, when pertinent. ELISA was performed for the Rotavirus research. The Cryptosporydium spp was surveyed and its parasitological examination was made. Results revealed the involvement of several enteropathogens alone and associated. Rotavirus was found in 51 (25.1%) samples, being 58.8% alone and 41.7% associated. Cryptosporidium spp was obtained in 43 (21.3%) samples, being the only agent involved in 65.1% of them and associated to other enteropathogens in the remaining 34.9%. The parasitological examination showed strongylids eggs in only 5 (2.5%) of the animals and in little amount, not exceeding more than two eggs by examined field. In the microbiological examination, one or more microorganisms were isolated; Escherichia coli was found in 100% of samples. The thermostable toxin and the adherence antigen K99 researches, made in 73 samples of E.coli, were negative. The serological grouping of the same ones were configured as 34.2%, 17.8% and 47.9% of the samples belonging to serological groups O8, O11 and O101, respectively. Salmonella dublin and Salmonella typhimurium were isolated in 5.4% and 6.1 % of the examined samples, respectively.
Two hundred and three samples of feces of calves aged less than 30 days old from both sexes and from different properties and regions of the state of São Paulo were examined in the period of two years. Bacterial cultures were carried out in bovine 10% bloodagar and Levine mediums, incubated for up to 96 hours in aerobic conditions at 37°C, with the observation of colonies and morphological and biochemical study to characterize isolated microorganisms, or other tests, when pertinent. ELISA was performed for the Rotavirus research. The Cryptosporydium spp was surveyed and its parasitological examination was made. Results revealed the involvement of several enteropathogens alone and associated. Rotavirus was found in 51 (25.1%) samples, being 58.8% alone and 41.7% associated. Cryptosporidium spp was obtained in 43 (21.3%) samples, being the only agent involved in 65.1% of them and associated to other enteropathogens in the remaining 34.9%. The parasitological examination showed strongylids eggs in only 5 (2.5%) of the animals and in little amount, not exceeding more than two eggs by examined field. In the microbiological examination, one or more microorganisms were isolated; Escherichia coli was found in 100% of samples. The thermostable toxin and the adherence antigen K99 researches, made in 73 samples of E.coli, were negative. The serological grouping of the same ones were configured as 34.2%, 17.8% and 47.9% of the samples belonging to serological groups O8, O11 and O101, respectively. Salmonella dublin and Salmonella typhimurium were isolated in 5.4% and 6.1 % of the examined samples, respectively.
Descrição
Palavras-chave
Diarrhea, Calves, Etiology, Rotavirus, Cryptospodium, Diarréia, Bezerros, Etiologia, Rotavírus, Cryptospodium
Como citar
Brazilian Journal of Veterinary Research and Animal Science. Faculdade de Medicina Veterinária e Zootecnia / Universidade de São Paulo, v. 41, n. 5, p. 313-319, 2004.