Pasteurella multocida is a
Gram-negative, nonmotile,
penicillin-sensitive
coccobacillus belonging to the
Pasteurellaceae family. Strains belonging to the species are currently classified into five
serogroups (A, B, D, E, F) based on capsular composition and 16 somatic serovars (1-16).
P. multocida is the cause of a range of diseases in mammals and birds, including fowl cholera in poultry, atrophic rhinitis in pigs, and bovine hemorrhagic
septicemia in cattle and buffalo. It can also cause a
zoonotic infection in humans, which typically is a result of bites or scratches from domestic pets. Many mammals (including domestic cats and dogs) and birds harbor it as part of their normal respiratory
microbiota.