Prevalence and Characterisation of yadA-Positive Yersinia enterocolitica in Pig Tonsils in 1995 and 1999

Prevalence of pathogenic Y. enterocolitica in pig tonsils has increased significantly in the four slaughterhouses during 1995–99. Some of the genotypes were shown to be stable and were found from same slaughterhouses in 1995 and 1999. Two same genotypes were dominating in 1995 and 1999.