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Pasteurella species and Mannheimia haemolytica (view source)
Revision as of 17:51, 16 December 2007
, 17:51, 16 December 2007no edit summary
*Carried in nasopharynx of many small rodents
*Carried in nasopharynx of many small rodents
*Causes pneumonia in rodents as a secondary disease
*Causes pneumonia in rodents as a secondary disease
===''Mannheimia''===
===''Mannheimia haemolytica''===
*Cause of epizootic pneumonia in cattle, also known as Shipping Fever, Transit Fever or Bovine Pneumonic Pasteurellosis
*Usually secondary to viral infections such as PI3 or IBR, or to mycoplasma
*Causes pasteurellosis in sheep
*Beta-haemolytic on blood agar
*Grow weakly on MacConkey agar
*All are ''Manheimia'' A biotypes
*Strains often produce a cytotoxin, known as leukotoxin, which kills leukocytes of ruminants
*Leukotoxin is a member of the RTX group toxins, and is probably largely responsible for the pasthogenicity of the bacteria in septicaemia and pneumonia
===''Mannheimia Glucosida''===
*Previously biotype A11
===''Mannheimia trehalosi''===
*T biotypes - trehalose fermenters