Gram negative coccobacillus, includes P. canis, P. dagmatis (sounds like something an ornery Walter Brennan would say), P. multocida ssp. multocida, P. multocida ssp. septica, P. stomatis and a bunch of others.
Infection usually starts within 24 hours of bite, it most commonly causes a bite infection. However, given the fact that people let their pets lick them anywhere, you can find the organisms anywhere. I had a case of meningitis in a patient whose cat liked to lick her nose and she put tuna on the nose to encourage the cat. Ick.
CAPD peritonitis (PubMed). I had a case in a patient whose cat liked to sleep in her bag warmer.
And many foot infections in patient who walk about barefoot in a house full of vermin, er, I mean cats.
A case of UTI in an old man who got if from the dog. How I do not know.
Avoid: first and second generation cephalosporins, macrolides.
Have low threshold of involving a hand surgeon if a bite. Unless, of course, the infection in not on the hand.
It is named after Louis Pasteur, who first identified it as the cause of chicken cholera. His name is immortalized as chicken shit? Some honor.
Relevant links to my Medscape blog
Last Update: 06/02/18.