Trials with Marek's disease vaccines prepared from a turkey herpes virus and an attenuated Marek's disease virus.
In field trials involving over 224,000 fowls in 11 different commercial flocks, three vaccines were used, namely a freeze-dried vaccine prepared from a turkey herpes virus, a cell-associated virus vaccine prepared from the same isolate and a cell-associated vaccine prepared from a strain of Marek's disease virus isolated from a fowl. The mortality from Marek's disease was reduced by 80 per cent to 95 per cent in birds vaccinated with the freeze-dried vaccine. Cell associated vaccines gave slightly less protection.
D000818:Animals; D002645:Chickens; D005612:Freeze Drying; D006564:Herpesviridae / Q000276:immunology*; D008381:Herpesvirus 2, Gallid / Q000276:immunology*; D007273:Injections, Intramuscular; D008380:Marek Disease / Q000401:mortality / Q000517:prevention & control*; D014422:Turkeys; D014613:Vaccines, Attenuated / Q000008:administration & dosage; D014765:Viral Vaccines / Q000008:administration & dosage
D014613:Vaccines, Attenuated; D014765:Viral Vaccines