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Pasteurella species and Mannheimia haemolytica (view source)
Revision as of 18:18, 16 December 2007
, 18:18, 16 December 2007no edit summary
*Beta-haemolytic on blood agar
*Beta-haemolytic on blood agar
*Grow weakly on MacConkey agar
*Grow weakly on MacConkey agar
*All are ''Manheimia'' A biotypes
*All are ''Mannheimia'' A biotypes
*Strains often produce a cytotoxin, known as leukotoxin, which kills leukocytes of ruminants
*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 pathogenicity of the bacteria in septicaemia and pneumonia
*Leukotoxin is a member of the RTX group toxins, and is probably largely responsible for the pathogenicity of the bacteria in septicaemia and pneumonia