yersinia

noun
yer·sin·ia | \yər-ˈsin-ē-ə \

Medical Definition of yersinia 

1 capitalized : a genus of gram-negative bacteria of the family Enterobacteriaceae that includes several important pathogens (as the plague bacterium, Y. pestis) affecting animals and humans and formerly included in the genus Pasteurella — see plague sense 2

2 : any bacterium of the genus Yersinia

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