Prevalence and antimicrobial susceptibility of Salmonella isolated from Korean slaughter pigs

Prevalence and antimicrobial susceptibility of Salmonella isolated from Korean slaughter pigs

During the period of December 2000 to November 2001, a total of 419(10.9%) Salmonella was isolated from 3,850 slaughtered pig samples(2,732 lymph nodes and 1,118 caecal contents) in Korea. Three hundred and seventy(13.5%) and 49(4.4%) Salmonella were isolated from lymph nodes and caecal contents, respectively. In the isolation ratio of Salmonella spp originated from each class of season, summer(15.7%), autumn(11.5%), spring(10.0%) and winter(8.3%), in order. As the result of serotyping, B group(67.5%) were the most common, in order of C$_1$(14.6%), D$_1$(6.0%), C$_2$(4.1%) and E$_1$(3.3%). 32 serovars were found, the major serotypes were as follows; S typhimurium(21.7%), S schwarzengrund(16.0%), S derby(15.8%), S typhimurium variant copenhagen(9.8%), S enteritidis (6.0%) and S mbandaka(6.0%). All of the isolates were susceptible to norfloxacin and ofloxacin. The isolates were resistant in order of doxycycline(69.2%), tetracycline(68.7%), penicliin(54.9%) and streptomycin(52.5%).