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Pasteurella species and Mannheimia haemolytica (view source)
Revision as of 17:25, 16 December 2007
, 17:25, 16 December 2007no edit summary
===Overview ''Pasteurella''===
===Overview ''Pasteurella''===
*Found in the upper respiratory tract and gastrointestinal tract mucosa
*Common commensal of the upper respiratory tract and gastrointestinal tract mucosa of animals
*Usually opportunistic organisms, causing disease during times of stress, low resistance or concurrent infections
*Usually opportunistic organisms, causing disease during times of stress, low resistance or concurrent infections
*Resist phagocytosis by their capsule
*Resist phagocytosis by their capsule
===Bacteria Properties===
===Bacteria Properties===
*Short Gram-negative bacilli
*Short Gram-negative bacilli or coccobacilli
*Oxidase-positive
*Oxidase-positive
*May show bipolar staining
*May show bipolar staining
===''Pasteurella multocida''===
===''Pasteurella multocida''===
*Large grey colonies on blood agar
*Not haemolytic
*Do not grow on MacConkey
*Four capsular serotypes, A,B,D,E and recently F
*Primary and secondary pathogen
*Causes Haemorrhagic Septicaemia in cattle
*Contributes to Atropic Rhinitis in pigs
*Causes septicaemia in chickens and turkeys known as folw cholera
*Involved in Snuffles (Pasteurellosis) in rabbits
*Responsible for secondary infections following primary viral and mycoplasmal infections, especially in the lungs, for example during pig enzootic pneumonia
*Typa A
*Typa A
*Type D
*Type D
**Causes Atropic Rhinitis along with ''Bordetella bronchiseptica''
**Causes Atropic Rhinitis along with ''Bordetella bronchiseptica'' in pigs
**Produces an osteolytic toxin, which stimulates osteoclast, inducing bone resorption
**Produces an osteolytic toxin, which stimulates osteoclast, inducing bone resorption