Abstract
Immune mapped protein-1 (IMP1) is a new protective protein in apicomplexan parasites, and exits in Eimeria tenella. Cloning and sequence analysis has predicted the antigen to be a novel membrane protein of apicomplexan parasites. In order to assess the immunogenicity of EtIMP1, a C-terminal derivative of EtIMP1 was expressed in a bacterial host system and was used to immunize chickens. The protective efficacy against a homologous challenge was evaluated by body weight gains, lesion scores and fecal oocyst shedding. The results showed that the subunit vaccine can improve weight gains, reduced cecal pathology and lower oocyst fecal shedding compared with non immunized controls. The results suggested that the C-terminal derivative of EtIMP1 might be considered as a candidate in the development of subunit vaccines against Eimeria infection.
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