Abstract
Attempts were made to evaluate the efficacy of herpes virus of turkey (HVT) in the protection of quail against Marek's disease (MD). One hundred and four 1-day-old quail, each vaccinated with 1000 plaque-forming units (PFU) of HVT were challenged 10 days post-vaccination with quail Marek's disease virus (QMDV) or chicken Marek's disease virus (CMDV). HVT-vaccinated and MDV (QMDV or CMDV) challenged quail showed similar levels of MD lesions to quail infected with MDV (QMDV or CMDV). In the QMDV-challenged group the level of protection was 19.4%. The level of protection in the CMDV-challenged group was similar (20.8%). The study indicated that HVT is not effective in protecting quail against MD.
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