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

Pesquisa Veterinária Brasileira

José P. Oliveira Filho²  Daniel P.g. Silva¹  Marcelo D. Pacheco¹  Luciene M. Mascarini¹  Marcio G. Ribeiro¹  Amauri A. Alfieri¹  Alice F. Alfieri¹  Danilo T. Stipp¹  Breno J.p. Barros¹  Alexandre S. Borges² 

[1] ,Unesp-Botucatu FMVZ Departamento de Clínica VeterináriaBotucatu SP ,Brasil

关键词: Beef calves;    Nelore;    diarrhea;    enteropathogens;    etiology;    Bezerros de corte;    Nelore;    diarréia;    entero-patógenos;    etiologia;   

DOI  :  10.1590/S0100-736X2007001000006

来源: SciELO

【 摘 要 】

Diarrhea is considered as one of the main causes of morbidity and mortality in neonates calves. Fecal samples from 100 diarrheic and 30 non-diarrheic (control group) Nelore calves less than 9 weeks old were collected for Salmonella spp., Escherichia coli, rotavirus, coronavirus, Cryptosporidium spp., and for helminth eggs investigation. Enteropathogens were detected in 79.0% diarrheic samples and 70.0% non-diarrheic samples. Among diarrheic calves, Escherichia coli (69.0%) was the most common agent found, following by Cryptosporidium spp. (30.0%), coronavirus (16.0%), and rotavirus (11.0%). In the control group, E. coli, Cryptosporidium spp. and coronavirus were detected in 66.7%, 10.0% and 3.3% of the samples, respectively. Salmonella spp. and strongylids were not found in any of the calves from either group. The K99 fimbrial only was detected in E. coli strains from diarrheic calves (5.8%). Enrofloxacin, norfloxacin, and gentamicin were the most effective among the antimicrobials tested. The weight of 210-day-old calves did not show statistic differences between diarrheic and non-diarrheic calves.

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