What best describes the mixed form of AHS?

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Multiple Choice

What best describes the mixed form of AHS?

In African horse sickness, there are distinct clinical forms based on how the virus affects the vasculature. The mixed form shows both respiratory and circulatory involvement, meaning the horse has signs of pulmonary disease (severe breathing difficulty, pulmonary edema) along with signs of cardiac/vascular involvement (edema of the head and neck, possible hydropericardium or other edema). This combination reflects the widespread endothelial damage caused by the virus, leading to fluid leakage in multiple tissues including the lungs and circulation. That’s why describing the mixed form as one that combines features of pulmonary and cardiac forms is the best fit. The other options describe forms that are limited to fever alone, lungs only, or neurological signs, which do not capture the dual involvement seen in the mixed presentation.

In African horse sickness, there are distinct clinical forms based on how the virus affects the vasculature. The mixed form shows both respiratory and circulatory involvement, meaning the horse has signs of pulmonary disease (severe breathing difficulty, pulmonary edema) along with signs of cardiac/vascular involvement (edema of the head and neck, possible hydropericardium or other edema). This combination reflects the widespread endothelial damage caused by the virus, leading to fluid leakage in multiple tissues including the lungs and circulation.

That’s why describing the mixed form as one that combines features of pulmonary and cardiac forms is the best fit. The other options describe forms that are limited to fever alone, lungs only, or neurological signs, which do not capture the dual involvement seen in the mixed presentation.

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