FIG. 1.

Results of recombinant POMP90 ELISAs and rOMP91B iELISA with experimental sera. Recombinant antigens were screened with sera from sheep which were experimentally infected with C. abortus and which yielded heavily infected placentas or aborted (group 1A, serum samples 1 to 58 [dark blue circles]) or which lambed normally with lightly infected placentas or with placentas that were positive by cell culture (group 1B, serum samples 59 to 70 [light blue circles]); with sera from sheep clinically free of OEA (group 2, serum samples 71 to 134 [red circles]); and with sera from SPF lambs immunized with different subtypes of C. pecorum (group 3, sheep 135 to 143 [green circles]). For experimental details, see Materials and Methods. The cutoff for each fragment is depicted on each graph by a horizontal line.