Bilbao Gladys N, Malena Rosana, Passucci Juan A, Pinto de Almeida Castro Aldana M, Paolicchi Fernando, Soto Pedro, Cantón Juliana, Monteavaro Cristina E
Departamentos de Producción Animal y de Sanidad Animal y Medicina Preventiva, Facultad de Ciencias Veterinarias UNCPBA, Tandil (Buenos Aires), Argentina.
Laboratorio de Bacteriología, Departamento de Producción Animal, INTA, Balcarce (Buenos Aires), Argentina.
Rev Argent Microbiol. 2019 Jul-Sep;51(3):241-246. doi: 10.1016/j.ram.2018.09.003. Epub 2019 Jan 9.
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 3dairy 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.
犊牛沙门氏菌病是一种影响其消化道并导致腹泻的细菌性疾病。为了研究犊牛中各种沙门氏菌血清型的流行情况及其与腹泻症状的关系，开展了一项横断面流行病学研究。该研究在阿根廷布宜诺斯艾利斯省的马尔和塞拉斯拉斯奶牛养殖区进行。在育犊期，对50个奶牛场中726头有或无腹泻症状的犊牛进行直肠黏膜拭子采样。鉴定为沙门氏菌属的分离株使用针对菌体、鞭毛和荚膜抗原（Vi）的多价和单价抗血清进行分类。在36%的养殖场中发现了沙门氏菌属，血清型包括：姆班达卡沙门氏菌、阿纳托姆沙门氏菌、鼠伤寒沙门氏菌、都柏林沙门氏菌、蒙得维的亚沙门氏菌、火鸡沙门氏菌、纽波特沙门氏菌、塞夫滕贝格沙门氏菌、亚种16,7:z1、婴儿沙门氏菌、吉韦沙门氏菌。5.5%的犊牛呈阳性，出现腹泻症状的犊牛感染沙门氏菌属的可能性是无腹泻症状犊牛的5.9倍。阳性犊牛的年龄从出生第一天到53天不等，第二天最为常见。总之，在马尔和塞拉斯拉斯奶牛养殖区三分之一的奶牛场中检测到11种沙门氏菌血清型，这些血清型不仅与包括粪便中出现黏液在内的腹泻症状有关，而且在21日龄以下的犊牛中更为普遍。
