Objective To evaluate two kinds of ELISA kits in detection of Yersinia pestis F1 antibody and antigen,respectively,which were developed and manufactured by Lanzhou Institute of Biological Products Co,Ltd( LIBP). Methods The samples,which previously stored in the laboratory or recently collected from the trial sites,were detected for Yersinia pestis antibody /antigen with 3 kinds of reagents and methods( double antigen and double antibody sandwich enzyme-linked immunosorbent kit( ELISA),indirect hemaglutinat...