Marek's disease control: comparative efficacy of cell-associated and cell-free lyophilized HVT vaccine.
The results of extensive trials to compare the protective efficacy of lyophilized with cell-associated turkey herpes virus vaccine against Marek's disease are reported. No significant differences in the degree of protection provided by these vaccines have been found. Marek's disease mortality in vaccinated chickens was always less than 1% up to the 30th week of age.
Zanella
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Institute of Infectious Diseases, Veterinary Faculty, University of Milano, Brescia, Italy.
Granelli
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G