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Antibody responses to C1A-GST in sequential sera from a steer experimentally infected with B. bigemina. Boran steer BJ26 was infected with B. bigemina sporozoites, and sequential sera were collected over a period of 228 days. Sera were diluted to 1:100 and tested by an ELISA with C1A-GST as the antigen. ELISA OD values were expressed as PP.
