Pretest (lane 1) and posttests (lanes 2 to 5) of BceICT strips. Bc test line: rBc48 was immobilized on the nitrocellulose membrane for the detection of antibody to B. caballi. Be test line: rEMA-2t was immobilized on the nitrocellulose membrane for the detection of antibody to B. equi. Lanes: 1, pretest; 2, antibodies to both B. caballi and B. equi are positive; 3, only the antibody to B. caballi is positive; 4, only the antibody to B. equi is positive; 5, the antibodies to both B. caballi and B. equi are negative.