Which bacteria species are associated with Pasteurella multocida infection?

Updated: Nov 07, 2019
  • Author: Sara L Cross, MD; Chief Editor: Michael Stuart Bronze, MD  more...
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Answer

Because P multocida infection is mostly encountered in the setting of an injury following an animal bite, physicians must be familiar with the associated microbiological oral flora of certain animals, especially dogs and cats.

Most animal bites are polymicrobial, with both aerobic and anaerobic bacteria. Several species can be isolated at once.

Several Pasteurella species are associated with dog and cat bites, including P multocida subspecies multocida,P multocida subspecies septica, Pasteurella stomatis, and Pasteurelladogmatis. Pasteurella canis is associated only with dog bites.

Other fastidious gram-negative organisms that have been associated with dog and cat bites include Capnocytophaga canimorsus and Capnocytophaga cynodegmi, especially in patients who had undergone previous splenectomy. C canimorsus infection can cause fulminant sepsis and meningitis, whereas C cynodegmi infection usually causes a milder localized inflammation.

Several other organisms are associated with cat bites, including Bartonella henselae, Francisella tularensis, and cowpox virus.


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