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→Pathology
==Pathology==
==Pathology==
===Gross===
Hyperacute:
No specific lesions but congestion of the carcass and change in skin colour.
No specific lesions but congestion of the carcass and change in skin colour.
Acute form:
Congestion of the carcass, in particular the spleen, lungs are oedematous and petechiae may be found below the kidney, peritoneum and on the heart. Lymph nodes will also be swollen and haemorrhagic.
Congestion of the carcass, in particular the spleen, lungs are oedematous and petechiae may be found below the kidney, peritoneum and on the heart. Lymph nodes will also be swollen and haemorrhagic.
Skin discolouration.
Chronic form:
Growths on heart valves may be evident as well as changes in joint architecture. Joint capsules will be thickened in the presence of granulation tissue and in some cases erosion of articular surfaces may have progressed to ankylosis.
Growths on heart valves may be evident as well as changes in joint architecture. Joint capsules will be thickened in the presence of granulation tissue and in some cases erosion of articular surfaces may have progressed to ankylosis.
Necrotic skin lesions may be present.
===Histologically===
===Histologically===