yersinia

noun

yer·​sin·​ia yər-ˈsin-ē-ə 

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