[Initial isolation and characterization of Yersinia enterocolitica in human feces in Argentina].

The isolation of Yersinia enterocolitica from a child's feces with an acute diarrhea is reported for the first time in Argentina. The strain was classified as belonging to the biotype 4 of Wauters, serotype O:3, phage type VIII. The virulence-associated test of autoagglutination, calcium dependency and production of heat-stable enterotoxin were positive, whereas neither lethality for the adult mouse by oral route, nor invasiveness by using the Serény test in the mouse, were demonstrated.