Key result
Vaccination against Marek's disease decreases mortality and increases body weight and egg production, with no known breakthrough viruses to date.
Why the study?
Does vaccination against Marek's disease reduce mortality and improve production in poultry?
Does vaccination against Marek's disease reduce mortality and improve production in poultry?
Vaccination against Marek's disease is highly effective at reducing mortality and improving production metrics in poultry.
Answers are grounded in this paper and cite their sources.
May support Marek vaccination in poultry; leaves open prospective trials to confirm benefits.
SUMMARYThere are three types of vaccines presently available for the control of Marek's disease (MD), namely the apathogenic MD viruses that spread horizonatlly, the altered viruses that do not spread and the herpesvirus of turkeys. The property of horizontal spread has its advantages and disadvantages.In choosing a vaccine one must consider the origin of the virus, the efficiency of the vaccine, whether or not it spreads horizontally and whether to use attenuated or natural viruses in cell-associated or cell-free form.Among the many advantages to vaccination are a decrease in mortality from MD and other causes, an increased body weight and egg production. To date no MD viruses have been isolated which will “break through” the protection conferred by these vaccines.
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H. G. Purchase (1973) conducted a review in Marek's disease. Vaccination was evaluated. Vaccination against Marek's disease decreases mortality and increases body weight and egg production, with no known breakthrough viruses to date.
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