In 'Manual of Clinical Microbiology', 6th edition, ASM Press, Yersinia
appears listed in 11 species, divided as follows:
Pathogenic
Y. pestis
Y. enterocolitica
Y. pseudotuberculosis
Controversial pathogenicity
Y. frederiksenii
Y. intermedia
Y. kristensenii
Y. aldovae
Y. bercovieiri
Y. mollaretti
Y. rohdei
Y. ruckeri