ISSN 2398-2977      

Pasteurella multocida


Synonym(s): P. multocida




  • Family:Pasteurellaceae.
  • Genus:Pasteurella.
  • Closely related to the generaActinobacillusandHemophilus.


  • Pasteurella- after Louis Pasteur (1822-1895).
  • Multocida: L:multus- much, many;cidere- to kill; ie pathogenic for many animals.

Active Forms

This article is available in full to registered subscribers

Sign up now to start a free trial to access all Vetlexicon articles, images, sounds and videos, or Login

Clinical Effects



  • Carried on mucous membranes of dogs, cattle and cats.


  • Multiplies on mucous membranes of host.


  • Usually via the respiratory tract.

Pathological effects

  • Antibodies are protective against hemorrhagic septicemia in cattle, but little is known about immunity in other species.
  • All members of the genus are probably parasites.
  • Stress, eg concurrent viral infection   →   becomes pathogenic.
  • Endotoxins are important in septicemic diseases, eg bovine hemorrhagic septicemia.
  • Thermolabile dermonecrotoxin is important in atrophic rhinitis of pigs.
  • Animal to animal spread usually via the respiratory tract; virulence may be enhanced following transmission.
    diseases caused
  • In horses,P. multocidamay cause lower respiratory tract infection ('transport pneumonia'), often in association withStreptococcus equisubspecieszooepidemicus  Streptococcus spp  . Also reported in an aborted fetus.
  • Serogroup A:
    • Pneumonia or suppurative conditions, eg abscesses, mastitis in cattle, sheep, pigs, rabbits and other species.
    • Fowl cholera.
    • Also found as commensals.
  • Serogroup B:
    • Epizootic hemorrhagic septicemia in ruminants.
    • Also found as commensals.
  • Serogroup D:
    • Atrophic rhinitis in pigs (may be in association withBordetella bronchiseptica  Bordetella bronchiseptica  ).
    • Pneumonia in pigs and other animals.
  • Serogroup E:
    • Epizootic hemorrhagic septicemia in cattle and water buffalo in Africa.
  • Serogroup F:
    • Found in turkeys - role unclear.

Other Host Effects

  • Carried on mucous membranes, especially of carnivores.


Control via chemotherapies

Control via environment

  • Avoid transport stress.


  • Killed vaccine available for cattle, poultry and pigs.
  • Some attenuated, live vaccines used in poultry.


This article is available in full to registered subscribers

Sign up now to start a free trial to access all Vetlexicon articles, images, sounds and videos, or Login

Further Reading


Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Raidal S L (1995) Equine pleuropneumonia. Br Vet J 151 (3), 233-262.
  • Mohan K, Sadza M, Madsen M et al (1994) Phenotypic characterization of Zimbabwean isolates of Pasturella multocida. Vet Microbiol 38 (4), 351-357 PubMed.
  • Wood J L N, Burrell M H, Roberts C A et al (1993) Streptococci and Pasteurella spp associated with disease of the equine lower respiratory tract. Equine Vet J 25 (4), 314-318 PubMed.
  • Collins F M (1977) Mechanisms of acquired resistance to Pasteurella multocida infection, a review. Cornell Vet 67 (1), 103-138 PubMed.

Can’t find what you’re looking for?

We have an ever growing content library on Vetlexicon so if you ever find we haven't covered something that you need please fill in the form below and let us know!


To show you are not a Bot please can you enter the number showing adjacent to this field

 Security code