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A genomic lambda gt11 DNA library of Mycobacterium tuberculosis was screened for expression of mycobacterial protein antigens with murine monoclonal antibodies. The reactivity patterns of the monoclonal antibodies ranged from those showing a limited interspecies reactivity to antibodies widely cross-reactive among different mycobacterial species. Twelve recombinant bacteriophages were isolated, containing eight mycobacterial genes (paa, pab, pac, pad, paeA, paeB, pafA, and pafB) encoding protein antigens. Physical maps of the phages were generated and the products of the recombinant genes were analyzed by immunoblotting techniques. PaeA and PaeB are distinct proteins but were shown to share an epitope. A similar condition was observed between PafA and PafB. Among the phages isolated, two groups expressed epitopes specific for M. tuberculosis and Mycobacterium bovis BCG. One group of phages produced an antigenic determinant which is found in M. tuberculosis and Mycobacterium marinum but not in M. bovis BCG.

infection and immunity

Isolation and characterization of recombinant lambda gt11 bacteriophages expressing eight different mycobacterial antigens of potential immunological relevance