Summary

The 2024 outbreak of avian metapneumovirus (aMPV) in the US continues to threaten poultry flocks. Since January, aMPV has spread rapidly in turkey and chicken flocks across the country. Avian metapneumovirus is a highly contagious RNA virus that mainly affects turkeys, chickens and ducks. The virus is mainly associated with upper respiratory tract infections which predispose the birds to secondary bacterial pathogens resulting in severe respiratory signs, high morbidity, and mortality.