Day-old vaccination of maternally immune turkeys against Newcastle disease
Box, P.G.; Robertson, W.W.; Warden, D.
Veterinary Record 102(1): 10-11
1978
ISSN/ISBN: 0042-4900 PMID: 556306 Document Number: 138499
Maternally immune day-old turkey poults were vaccinated against Newcastle Disease with LaSota live vaccine and, concurrently, with emulsion killed vaccine. After an initial fall in maternal antibody the haemagglutination inhibition geometric mean titre (GMT) of these birds rose to log26 and persisted at that level for eight months. Re-vaccination of some birds at 10 weeks with the emulsion vaccine caused GMTs to rise to log211. Six months later these levels were at log27. Further emulsion vaccination at 28 weeks produced a good anamnestic effect, the titre rising to log212. The authors discuss the possible advantages of this programme of vaccination as a routine for the immunization of both fattening and breeding birds.