Difference between revisions of "Staphylococcus aureus"
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===Bovine mastitis=== | ===Bovine mastitis=== | ||
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*Chronic, suppurative granulomatous condition | *Chronic, suppurative granulomatous condition | ||
*''S. aureus'' | *''S. aureus'' | ||
| − | *Occurs following castration of horses due to infection of stump of spermatic | + | *Occurs following castration of horses due to infection of stump of spermatic cors |
*Occurs in mammary tissues of sows | *Occurs in mammary tissues of sows | ||
*Mass of fibrous tissue containing pus and sinus tracts | *Mass of fibrous tissue containing pus and sinus tracts | ||
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*[[Bacterial skin infections - Pathology#Impetigo|Impetigo]] in cattle and pigs | *[[Bacterial skin infections - Pathology#Impetigo|Impetigo]] in cattle and pigs | ||
| − | * [[Oedema#Permeability type|Permeability types of pulmonary oedema]] | + | * [[Oedema - Pathology#Permeability type|Permeability types of pulmonary oedema]] |
| − | *Haemorrhagic disease by [[ | + | *Haemorrhagic disease by [[Haemostasis - Pathology#Secondary Thrombocytopenic Disease|secondary thrombocytopenic disease]] |
| − | *May infect [[ | + | *May infect [[Joints Inflammatory - Pathology#In Sheep|joints of sheep]]; [[Joints Inflammatory - Pathology#In Pigs|arthritis in pigs]] |
*Dermatitis in sheep and goats | *Dermatitis in sheep and goats | ||
*Arthritis and septicaemia in turkeys | *Arthritis and septicaemia in turkeys | ||
*Bumblefoot and omphalitis in chickens | *Bumblefoot and omphalitis in chickens | ||
| − | + | [[Category:Staphylococcus species]][[Category:Cattle]][[Category:Sheep]][[Category:Pig]] | |
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| − | [[Category:Staphylococcus species]][[Category:Cattle | ||
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Revision as of 23:03, 14 May 2010
Bovine mastitis
- S. aureus is a common cause of mastitis in cattle worldwide
- Most infections subclinical
- Systemic infection can occur with peracute and gangrenous forms
- In gangrenous mastitis, the quarter may become necrotic and slough off; alpha toxin causes necrosis of smooth muscle in blood vessel walls, reducing blood flow to the affected quarter, and causes release of lysomal enzymes from leukocytes
Tick pyaemia
- Infection of lambs with S. aureus in hill-grazing areas of the UK
- Lambs carry S. aureus on their skin and nasal mucosa; infection via skin trauma including tick bites
- Ixodes ricinus tick acts as a vector for Ehrlichia phagocytophila, which causes immunosuppression in lambs, predisposing to staphylococcal infection
- Acute septicaemia and death or localised abscess formation in many organs
- Arthritis, posterior paresis and ill-thrift
- Microscopic identification of bacteria in pus and isolation of S. aureus
- Prophylactic antibiotics e.g. tetracyclines initiated at 1 week of age may prevent infection
- Tick control important
Botryomycosis
- Chronic, suppurative granulomatous condition
- S. aureus
- Occurs following castration of horses due to infection of stump of spermatic cors
- Occurs in mammary tissues of sows
- Mass of fibrous tissue containing pus and sinus tracts
Other infections caused by S. aureus
- Impetigo in cattle and pigs
- Permeability types of pulmonary oedema
- Haemorrhagic disease by secondary thrombocytopenic disease
- May infect joints of sheep; arthritis in pigs
- Dermatitis in sheep and goats
- Arthritis and septicaemia in turkeys
- Bumblefoot and omphalitis in chickens