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WHY DO COCCIDIOSIS VACCINES CONTAIN MORE THAN ONE SPECIES OF COCCIDIA?

April 26, 2017coccidia coccidiosis contain species vaccines

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WHY DO COCCIDIOSIS VACCINES CONTAIN MORE THAN ONE SPECIES OF COCCIDIA?

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A. Immunity to coccidia is species specific. Therefore, immunity developed against one species does not provide cross protection against a different species. For example, vaccinating or exposing birds to only E. tenella over a period of time will provide immunity or protection only to further challenges against E. tenella. In order to provide broad protection against coccidiosis, vaccines contain all the species considered pathogenic to poultry.