[Objective]The aim was to provide a theoretical basis for preparation of polyclonal antibodies and monoclonal antibody that of type specificity, as well as Foot-and-mouth Disease Virus （FMDV） typing.[Method] The recombinant plasmid pGEM-CP1 that contained VPI gene of FMDV of serotype C was used as template for the VP1 and its C terminus coding fragments of FMDV of serotypes C amplification. The coding fragments of VP1 and its C terminus were respectively cloned into prokaryotic expression vector for prokaryotic expression and the reactionogenicity was detected. The purified fusion protein of FMDV VP1 and its C terminus of serotype C were used to construct the indirect ELISA method to detect positive sera of four serotypes A, O, C and Asia 1 of guinea pig and determine the cross reactivity of FMDV antibody of VP1 and its C terminus of serotype C with other three serotypes. [ Result] The recombinant prokaryotic expression plasmids of PPRO-CVP1 and pPRO-CVPlc were constructed, FMDV VP1 and its C terminus of serotype C were expressed in high level, and the molecular weight of target proteins was 33 kD and 20 kD respectively. Western blot result showed that the fusion protein of VP1 and its C terminus could react with the positive sera of guinea pig of the same serotype. ELISA results revealed that VP1 and its C terminus of serotype C are type-specific and no cross-reactivities were shown between guinea pig positive sera of FMDV of serotype C with the other three serotypes, and the C terminus showed better type-specificity. [ Conclusion] FMDV specific antigen of serotype C was obtained.
