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Exp Parasitol. 1987 Dec;64(3):281-91.

Brugia malayi: recombinant antigens expressed by genomic DNA clones.

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Molecular Parasitology Group, New England Biolabs, Inc., Beverly, Massachusetts 01915.


A Brugia malayi genomic DNA expression library was screened with rabbit antiserum generated against live infective larvae and 33 clones were identified. Five randomly selected clones were characterized in detail by Western blot, DNA and RNA analyses. The fusion proteins produced by each of these recombinant DNA clones are expressed by different genomic sequences. A profile of antigenic cross-reactivities of all 33 recombinant clones was compiled using a battery of antisera, including sera from humans infected with B. malayi. A high percentage of clones were cross-reactive with antisera against the filarial parasites B. pahangi, Dirofilaria immitis, and Onchocerca volvulus. We have made a preliminary identification of three categories of recombinant clones encoding (1) antigens that were cross-reactive with some or all antisera tested, (2) antigens that were specific to the Brugia genus, and (3) antigens that appeared to be specific to B. malayi. These recombinant antigens are candidates for further studies in filarial immunoprophylaxis and diagnosis.

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