Surveillance of equine influenza in France
نویسندگان
چکیده
Equine influenza virus belongs to the family Orthomyxoviridae (enveloped RNA viruses having helicoidal symmetry). Until 1963 equine influenza was attributed to a single type of virus, isolated and identified in Prague in 1956, and now referred to as inf luenza/A/equine/Prague/1/56 (H7N7). A strain of virus completely different in its antigenic properties appeared in 1963 in the USA. This subtype, named influenza /A/equ ine /Miami /1 /63 (H3N8), has caused very severe outbreaks in different regions of the world, affecting most of the horse populat ions.
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