Interazione tra vaccini vivi per la profilassi della rinotracheite del tacchino e della malattia di Newcastle somministrati in associazione ad un giorno di vita nel tacchino.

The combined administration of Newcastle Disease (ND) and avian Metapneumovirus (AMPV) live vaccines in turkey hatcheries is advantageous, but compatibility has not yet been demonstrated experimentally. To investigate any possible interference between the two vaccines, AMPV subtype B live vaccine was given to one-day-old turkeys either alone or in combination with two different ND vaccine strains (B1 and VG/GA). AMPV and NDV post vaccination shedding and humoral immune response were assessed. Results showed that following single or combined vaccinations both AMPV and/or ND vaccine virus was detected in the respiratory tract of all of the birds in all groups. In addition, birds were protected from virulent AMPV virus challenge and differences in clinical signs between groups vaccinated with AMPV vaccine alone or in combination with ND vaccine were not statistically significant.