In order to study the effect of Chinese herbal anticoccidial additive on Eimerial tenlla in chickens, 150 14-day old chickens were randomly divided into groups of negative control, positive control, 1%, 2%, and 5% of Chinese herbal additive treatment. The chickens in the two control groups were fed with basic diet and those in the treatment groups were fed with basic diet supplemented with 1%, 2%, or 5% of Chinese herbal additive. Except the chickens in the negative control group, each chicken was vaccinate...
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