Infectious Diseases 2018

Infectious Diseases 2018

Recent outbreaks of avian influenza in France

14 February, 2018

Between December and February, four cases of H5N3 LPAI and five of H5 LPAI were reported in commercial duck farms in Gers, Loire Atlantique, Lot and Garonne, Morbihan and Vendee regions, and two H5N3 HPAI in turkey breeding farms in Maine et Loire, westand southwest France. The infected ducks did not present any clinical signs, the infection being detected by screening prior to moving into a gavage unit. In addition, a case of H5N2 LPAI was also detected in fattening ducks in the Landes region. Mutation of H5 LPAI to HPAI is a relatively rare event, but further virus diversity may arise through LPAI viruses reassorting with HPAI strains (especially in wild waterfowl populations), where both are circulating, as suggested for the emergence of the H5N6 HPAI strain in Europe, so the early detection of LPAI virus strains in a region of high poultry density where there are multiple contact routes is important.