Yersinia enterocolitica in Danish pigs

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Abstract
Yersinia enterocolitica serotype 0:3, the predominating pathogenic serotype in Danish pigs, was isolated consistently from the tonsils of pigs in six farms but not from those in another four farms during a one‐year survey, indicating a herd‐wise distribution. Only one positive culture was obtained from four specific‐pathogen‐free herds. The organisms were not recovered from samples of fodder, water and faeces from any of the infected farms. Strains of Y. enterocolitica were tested for sensitivity to antimicrobial agents.