Avian Metapneumovirus (aMPV), also known as Swollen Head Syndrome (SHS), Avian Rhinotracheitis (ART), Turkey Rhinotracheitis (TRT), or Avian Pneumovirus (APV), has been reported in turkeys, turkey breeders, broilers, broiler breeders, commercial egg layers, and layer breeders. The first Subtype B outbreak was observed in Fall/Winter 2023 in North Carolina, alongside suspicions of Subtype A in California. |