Compatibility Of VAXXITEK® HVT+IBD With Hatchery Vaccines

Stéphane Lemiere, Anne-Lise Saint-Gérand & François-Xavier Le-Gros

Compatibility studies were performed using challenge tests against specified pathogens using the vaccines administered in the hatchery, Newcastle disease, infectious bronchitis, avian Metapneumovirus… (Table 1). Compatibility is mainly a concern for hatchery day-old vaccination. With the development of in ovo vaccination worldwide and the launch of in ovo vaccines, compatibility with other in ovo vaccines will also have to be investigated. Compatibility with other Avian Herpesvirus vaccines was studied by evaluation of protection of separated vaccines and the association of VAXXITEK HVT+IBD and another one, SB-1 serotype 2 or Rispens serotype 1. These vaccines are commonly used reconstituted into the same diluent and injected at the same time. Inactivated Newcastle vaccines are commonly injected at two separate points of injection to the day-old chicks (Table 2). Live vaccines against Newcastle disease, infectious bronchitis, avian Metapneumovirus are commonly used in hatcheries. Compatibility when used the same day as VAXXITEK HVT+IBD by spray has as well to be validated. Evidence of protection against respective pathogens and protection against IBD studied in vaccinated day-olds is necessary to obtain in order to recommend the use in the hatchery, even if both routes of administration, injection for VAXXITEK HVT+IBD and sprayed respiratory vaccines, are different.