Matteo Legnardi

1. IntroductionAvian metapneumovirus (aMPV) is a highly infective virus that affects turkeys and chickens, causing turkey rhinotracheitis (TRT) and swollen head syndrome (SHS), respectively. aMPV also has the capacity to infect other avian species [1–3]. The virus is primarily associated with upper respiratory infections, predisposing birds to opportunistic bacterial pathogens, which ca ...