| Line 22: |
Line 22: |
| | ''[[Actinobacillus equuli]]'' | | ''[[Actinobacillus equuli]]'' |
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| − | | + | ''[[Actinobacillus suis]]'' |
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| − | ===''Actinobacillus suis''===
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| − | *May be present in upper respiratory tract of sows
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| − | *Pathogenicity and clinical signs:
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| − | **Infection of piglets via aerosol or possibly skin abrasions
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| − | **Fatal septicaemia in piglets 1-8 weeks old
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| − | **Mortality up to 50% in some litters
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| − | **Fever, respiratory distress, prostration and paddling of forelimbs seen in piglets
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| − | **Petechial and ecchymotic haemorrhages in many organs
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| − | **Interstitial pneumonia, pleuritis, meningoencephalitis, myocarditis and arthritis
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| − | **Causes abscesses in joints and lungs of older pigs
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| − | **Carried in the nasopharynx of pigs and nose of horses
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| − | **Carriage may confer immunity to the more severe pleuropneumonia
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| − | *Diagnosis:
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| − | **Specimens cultured on blood agar and MacConkey agar for 1-3 days
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| − | **Sticky haemolytic colonies
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| − | **Pink, lactose-fermenting colonies on MacConkey agar
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| − | *Treatment and control:
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| − | **Bacteria usually susceptible to ampicillin, carbenicillin, potentiated sulphonamides and tetracyclines
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| − | **Disinfect contaminated pens
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| − | *Other animals:
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| − | **Septicaemia and pneumonia in foals
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| − | **Pneumonia in pigs and horses
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