Which pathology finding is characteristic of AHS across forms?

Which pathology finding is characteristic of AHS across forms?

• A. Pulmonary edema with pleural effusion is a characteristic finding; hydropericardium with petechiae; mucosal edema
• B. Renal infarcts
• C. Liver necrosis
• D. Neuritis

Answer: (A)

Across the different forms of African horse sickness, the defining pathology is widespread vascular leakage leading to edema and serous effusions. This produces pulmonary edema with pleural effusion, hydropericardium (often with small petechiae from capillary leakage), and edema of mucosal surfaces. The virus damages endothelium and causes vasculitis, so fluid accumulates in the lungs, heart sac, and mucous membranes consistently across forms. Renal infarcts, liver necrosis, or neuritis are not the characteristic, across-form findings for AHS.

Across the different forms of African horse sickness, the defining pathology is widespread vascular leakage leading to edema and serous effusions. This produces pulmonary edema with pleural effusion, hydropericardium (often with small petechiae from capillary leakage), and edema of mucosal surfaces. The virus damages endothelium and causes vasculitis, so fluid accumulates in the lungs, heart sac, and mucous membranes consistently across forms. Renal infarcts, liver necrosis, or neuritis are not the characteristic, across-form findings for AHS.