Difference between revisions of "Mannheimia haemolytica"
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| − | + | *Cause of epizootic pneumonia in cattle known as Shipping Fever, Transit Fever or [[Respiratory Bacterial Infections - Pathology#Pneumonic pasteurellosis|pneumonic pasteurellosis]] (90% caused by ''Mannheimia haemolytica'' Biotype A, serotype 1 but also ''[[Pasteurella multocida]]'' | |
| − | + | *Usually secondary to viral infections such as [[Respiratory Viral Infections - Pathology#Parainfluenza- 3|parainfluenza - 3]] or [[Respiratory Viral Infections - Pathology#In Cattle|IBR]], bacterial infections such as ''Mycoplasma'' or environmental stress | |
| + | *May contribute to [[Respiratory Bacterial Infections - Pathology#Enzootic pneumonia of calves|Enzootic pneumonia of calves]] | ||
| + | *Enzootic pneumonia in sheep | ||
| + | * [[Peritonitis - Pathology#Peritonitis|Peritonitis in sheep]] | ||
| + | * [[Oedema - Pathology#Permeability type|Permeability types of pulmonary oedema]] | ||
| + | *Septicaemia in young lambs | ||
| + | *Causes gangrenous mastitis in sheep | ||
| + | *Beta-haemolytic on blood agar | ||
| + | *Grow weakly on MacConkey agar | ||
| + | *Odourless | ||
| + | *All are ''Mannheimia'' A biotypes (previously ''Pasterurella haemolytica'') | ||
| + | *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 | ||
| − | + | [[Category:Pasteurella_and_Mannheimia_species]][[Category:Cattle]][[Category:Sheep]] | |
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Revision as of 13:31, 10 June 2010
- Cause of epizootic pneumonia in cattle known as Shipping Fever, Transit Fever or pneumonic pasteurellosis (90% caused by Mannheimia haemolytica Biotype A, serotype 1 but also Pasteurella multocida
- Usually secondary to viral infections such as parainfluenza - 3 or IBR, bacterial infections such as Mycoplasma or environmental stress
- May contribute to Enzootic pneumonia of calves
- Enzootic pneumonia in sheep
- Peritonitis in sheep
- Permeability types of pulmonary oedema
- Septicaemia in young lambs
- Causes gangrenous mastitis in sheep
- Beta-haemolytic on blood agar
- Grow weakly on MacConkey agar
- Odourless
- All are Mannheimia A biotypes (previously Pasterurella haemolytica)
- 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