Laboratory and field evidence indicates that a safe and effective procedure has been developed for vaccinating turkey poults against hemorrhagic enteritis of turkeys. Vaccination is by drinking-water administration of turkey-spleen-propagated pheasant-origin live avirulent virus to 4 1/2-week-old-poults. The effect of vaccination was studied in a field location having recurrent 10-15% mortality and in a second location having recurrent mortality of 0.1-0.2%. The poults involved totaled 214,554.
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Domermuth et al. (1977) studied this question.
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