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Initial screening of 28 recombinant mycobacterial proteins. Average ELISA IFN-γ responses and standard deviation for blood samples isolated from six cattle infected with 104 CFU of M. bovis at 126 and 154 days postinfection and three cattle infected with 104 CFU of M. bovis at 182 days postinfection. Antigen numbers on the x axis correspond to the antigen numbers in Table 2. Antigen 29 is the phosphate-buffered saline control. Open circles mark antigens selected for further study.
