Yersinia enterocolitica 08 "American strain" isolated in Italy.

A strain of Yersinia enterocolitica serotype 08: b,e,f,i, "American strain", was isolated from a child suffering from febrile enteritis, without any history of foreign travel. Such a strain, very uncommon in Italy, though isolated from a sick child, lacked both in vivo and in vitro virulence-associated characteristics as lethality in mice, spontaneous autoagglutination and calcium dependency, traits correlated to a lack of the virulence plasmid.