Bilan d'une enquête épidémiologique sur les yersinioses dans un écosystème agrosylvatique en région parisienne. II - Recherche des « Yersiniadans les populations animales sauvages

101 typical Y. enterocolitica strains, 3 rhamnose fermenting Y.e. strains, 45 sucrose negative Y.e. strains and 142 Y. pseudotuberculosis strains were isolated during twelve months study from 441 small wild rodents, 66 schrews, 339 hares, 4 rabbits and 272 birds. The serogroups and chemotypes of these strains compared to the strains isolated from the soil of the same ecosystem bring a new approach to the epidemiology of Yersinia enterocolitica infections. Only 4/0 : 3/VIII and 2/0 : 9/X₃ Y.e. strains are adapted to human and we never encountered in the environment. Y.e. sucrose negative and Y.e. of chemotype 3A and 3B must be considered as soil's bacteria. Strains of chemotypes 1 and 2 belong to a non adapted group while rhamnose fermenting Y.e. belongs to a running water ecosystem. These groups are occasionnally pathogenic for man.