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110-kilodalton recombinant protein which is immunoreactive with sera from humans, dogs, and horses with Lyme borreliosis.

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Abstract

EcoRI-digested DNA from Borrelia burgdorferi was ligated into the dephosphorylated vector pWR590 and transformed into Escherichia coli DH5 alpha. When the gene library was screened, 20 clones reacted with pooled dog sera with high titers (immunofluorescent antibody titer, greater than or equal to 1,280) to this spirochete. One clone expressed a 110-kDa antigen that reacted strongly with the high-titered pooled sera from dogs with
Lyme borreliosis and serum from goats immunized with B. burgdorferi. The 110-kDa protein was serum from goats immunized with B. burgdorferi. The 110-kDa protein was expressed with and without isopropyl-beta-D-thiogalactosidase, indicating the protein is not a fusion protein with beta-galactosidase. Monospecific antisera to the 110-kDa antigen recognized a 75-kDa Borrelia protein. Of the sera that reacted with B. burgdorferi by immunoblotting; 57, 100, and 83% of human, dog, and horse serum samples, respectively, reacted with the 110-kDa protein. Sera from individuals that tested negative with a B. burgdorferi lysate with immunoblotting showed no reaction with the 110-kDa protein. The 110-kDa antigen appears to be useful for the diagnosis of
Lyme borreliosis.

J Clin Microbiol. 1991 Nov;29(11):2418-23. Research Support, Non-U.S. Gov’t

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