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HAH
Influenza A viruses belong to the family Orthomyxoviridae and are mostly found in humans, pig, poultry and horses, but also in many others such as birds or dogs. In hors, equine influenza is caused by the subtypes A equi 1 (H7N7) and A equi 2 (H3N8), although H7N7 has not been very present anymore over the past 30 years. In susceptible
Equidae, an infection causes fever and a rough, dry cough. In unvaccinated populations, the virus spreads quickly. Secondary bacterial infections with mucopurulent nasal discharge are frequent and mask the clinical picture, especially in partially immune populations.
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