Wray C, Todd N, McLaren I, Beedell Y, Rowe B
Ministry of Agriculture, Fisheries and Food, Central Veterinary Laboratory, New Haw, Weybridge, Surrey.
Epidemiol Infect. 1990 Oct;105(2):295-305. doi: 10.1017/s0950268800047890.
Salmonellas were detected in the environment of 10 of the 12 calf dealers' premises studied. The cleaning and disinfection routines were often ineffective and salmonellas were isolated from 7.6% and 5.3% of the wall and floor samples before disinfection and 6.8% and 7.6% afterwards. Eight different salmonella serotypes were detected, of which the commonest were Salmonella typhimurium, predominantly phage type DT204C, and S. dublin. Plasmid profiles were used to fingerprint S. typhimurium DT204C and the results indicated that with the exception of one of the premises, prolonged salmonella-persistence in the environment was not occurring. Three separate epidemics of salmonellosis in calves were studied by use of plasmid profile analysis. The results illustrated the role of delers, and their subcontractors, in the dissemination of salmonellas. The study concludes with suggestions for methods to reduce the spread of salmonellas in the calf marketing chain.
在所研究的12个小牛经销商经营场所中，有10个场所的环境检测出了沙门氏菌。清洁和消毒程序往往无效，消毒前分别有7.6%的墙壁样本和5.3%的地板样本分离出沙门氏菌，消毒后这两个比例分别为6.8%和7.6%。检测出了8种不同的沙门氏菌血清型，其中最常见的是鼠伤寒沙门氏菌，主要是噬菌体类型DT204C，以及都柏林沙门氏菌。利用质粒图谱对鼠伤寒沙门氏菌DT204C进行指纹识别，结果表明，除了其中一个场所外，沙门氏菌在环境中并未长期存在。通过质粒图谱分析对小牛沙门氏菌病的三起独立疫情进行了研究。结果说明了经销商及其分包商在沙门氏菌传播中的作用。该研究最后针对减少小牛销售链中沙门氏菌传播的方法提出了建议。
