About: Salmonellosis in calves is a bacterial disease that affects their digestive tract causing diarrhea. A cross-sectional epidemiological study was carried out with the aim of studying the prevalence of various serovars of Salmonella in calves and their relationship with diarrhea signs. The study was conducted in Mar and Sierras Dairy Basin located in Buenos Aires province, Argentina. Seven hundred and twenty six calves both with diarrhea signs or not were sampled by rectal mucosa swab in 50 dairy farms during the rearing period. Isolates identified as Salmonella spp. were classified using polyvalent and monovalent antisera against somatic, flagellar and capsule antigens (Vi). Salmonella spp. was found in 36% of the farms and serotypes were: S. Mbandaka, S. Anatum, S. Typhimurium, S. Dublin, S. Montevideo, S. Meleagridis, S. Newport, S. Seftemberg, S. subesp. 16,7:z1, S. Infantis, S. Give. A percentage of 5.5% calves was positive and calves showing diarrheal signs were 5.9 times more likely to be infected with Salmonella spp. than those having no signs. The age of positive calves ranged from the first day of life to 53; the second day being the most frequent time. In conclusion, 11 Salmonella serovars were detected in one out of 3 dairy farms in Mar and Sierras Dairy Basin, and not only were these serovars associated with diarrhea signs including the presence of mucus in feces, but they were also more prevalent among calves aged up to 21 days.   Goto Sponge  NotDistinct  Permalink

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  • Salmonellosis in calves is a bacterial disease that affects their digestive tract causing diarrhea. A cross-sectional epidemiological study was carried out with the aim of studying the prevalence of various serovars of Salmonella in calves and their relationship with diarrhea signs. The study was conducted in Mar and Sierras Dairy Basin located in Buenos Aires province, Argentina. Seven hundred and twenty six calves both with diarrhea signs or not were sampled by rectal mucosa swab in 50 dairy farms during the rearing period. Isolates identified as Salmonella spp. were classified using polyvalent and monovalent antisera against somatic, flagellar and capsule antigens (Vi). Salmonella spp. was found in 36% of the farms and serotypes were: S. Mbandaka, S. Anatum, S. Typhimurium, S. Dublin, S. Montevideo, S. Meleagridis, S. Newport, S. Seftemberg, S. subesp. 16,7:z1, S. Infantis, S. Give. A percentage of 5.5% calves was positive and calves showing diarrheal signs were 5.9 times more likely to be infected with Salmonella spp. than those having no signs. The age of positive calves ranged from the first day of life to 53; the second day being the most frequent time. In conclusion, 11 Salmonella serovars were detected in one out of 3 dairy farms in Mar and Sierras Dairy Basin, and not only were these serovars associated with diarrhea signs including the presence of mucus in feces, but they were also more prevalent among calves aged up to 21 days.
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