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| − | ===Swine erysipelas=== | + | ===[[Swine Erysipelas]]=== |
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| − | *Carrier pigs act as reservoir of infection
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| − | *Organisms excreted in faeces of acutely-affected pigs
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| − | *Ingestion of contaminated food and water, or via skin abrasions
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| − | *Clinical outcome depends on susceptibility of pigs and virulence of strain
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| − | *Pigs susceptible after maternal antibody waned (after 3 months) and before protective immunity acquired (3 years)
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| − | *Change in diet, extremes of temperature and fatigue thought to predispose to infection
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| − | *Septicaemic form:
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| − | **Acute; incubation period 2-3 days
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| − | **Pigs found dead, febrile, depressed, recumbent or with stilted gait
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| − | **Mortality high
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| − | **Pregant sows abort
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| − | *Cutaneous form:
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| − | **Diamond skin lesions
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| − | **Fewer systemic signs, mortality rates lower
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| − | **Pigs febrile with small, pink/purple raised areas or extensive diamond-shaped plaques over skin
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| − | **Lesions may resolve within a week, or become necrotic and slough
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| − | *Arthritis:
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| − | **Older pigs, chronic
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| − | **Stiffness, lameness, non-weight bearing on affected limbs
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| − | **Joint lesions with erosion of articular cartilage, fibrosis and ankylosis
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| − | **Strong impact on productivity
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| − | *Chronic valvular endocarditis:
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| − | **Vegetatic thrombosis of mitral valves
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| − | **Asymptomatic or congestive heart failure and sudden death with stress
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| − | *Diagnosis:
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| − | **Diamond-shaped skin lesions
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| − | **Haematology and post mortem, especially liver, [[Spleen - Anatomy & Physiology|spleen]], heart valves, synovial tissues
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| − | **Slender Gram-positive rods on microscopy of acute lesions; filamentous forms in chronic lesions and smears
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| − | **No growth on MacConkey agar
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| − | **Colonial characteristics and biochemical tests
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| − | *Treatment:
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| − | **Penicillin and tetracyclines for acute infections
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| − | **Hyperimmune serum
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| − | *Control:
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| − | **Hygience
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| − | **Cull chronic cases
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| − | **Isolate affected pigs
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| − | **Live attenuated or inactivated vaccines
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| | ===Turkey erysipelas=== | | ===Turkey erysipelas=== |
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| | *Occasional joint and heart disease after haematogenous spread if untreated | | *Occasional joint and heart disease after haematogenous spread if untreated |
| | [[Category:Bacteria miscellaneous]][[Category:Gram_positive_bacteria]][[Category:Rods]][[Category:Pig]][[Category:Sheep]][[Category:Poultry]] | | [[Category:Bacteria miscellaneous]][[Category:Gram_positive_bacteria]][[Category:Rods]][[Category:Pig]][[Category:Sheep]][[Category:Poultry]] |
| | + | [[Category:To_Do_-_Bacteria]] |