Medical Definition of pasteurella
1 capitalized : a genus of gram-negative facultatively anaerobic nonmotile rod bacteria of the family Pasteurellaceae that stain differentially at the poles of the cell and include several important pathogens especially of domestic animals—see hemorrhagic septicemia, yersinia
2plural pasteurellas or pasteurellae \-ˌlī\play : any bacterium of the genus Pasteurella
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