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Equine Influenza
Orthomyxoviridae
Question | Answer |
---|---|
Previously equine influenza A1: | A/H7N7 |
Previously equine influenza A2: | A/H3N8. Variant of this virus causes influenza in dogs. VERY UNSTABLE under ordinary environmental conditions |
Transmission? Carrier state? Shedding? | Aerosolized infectious exudates. NONE. Horses can shed virus up to week following recovery |
Pathogenesis? | Replicates in the epithelial cells of the respiratory tract so lesions like laryngitis, tracheitis, bronchitis, and other URT infections |
Clinical signs? | Rapid spread, high fever, dry, hacking paroxysmal cough: ABORTION in mares with prolonged fever |
Recovery? Mortality? | within 7-10 days. Mortality is rare but MORE FREQUENT if there is an intercurrent bacterial infection |
What are the horses vaccinated with? | bivalent inactivated H7N7 and H3N8 antigens |