yersinia thracica yersinia thracica yersinia thracica is a gram-negative species of enteric bacteria in the yersinia genus that is closely related to yersinia kristensenii. reportedly, it has only been isolated in animals. the type strain, ip34646t, was isolated from diseased rainbow trout while other isolates are from birds, pig feces, and wild boars. yersinia thracica scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: enterobacterales family: yersiniaceae genus: yersinia species: y. thracica binomial name yersinia thracicale guern et al. 2020