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COMPARATIVE STUDY
JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
A new attempt to distinguish serologically the subspecies of Treponema pallidum causing syphilis and yaws.
Journal of Clinical Microbiology 1990 July
In an effort to serologically differentiate syphilis from yaws, 69 monoclonal antibody species raised against Treponema pallidum subsp. pallidum were tested by immunoblotting for their reactivity with Treponema pallidum subsp. pertenue. All monoclonal antibodies reacted with antigens with the same molecular weight of both subspecies. Furthermore, no differences in reactivity between sera from yaws patients and from syphilis patients were found by Western blot (immunoblot) analysis of cell lysates of T. pallidum subsp. pallidum and T. pallidum subsp. pertenue. We tried to exploit the only known molecular difference between the subspecies. The subunits of the 190-kilodalton multimeric proteins TpF1 and TyF1 of T. pallidum subsp. pallidum and T. pallidum subsp. pertenue, respectively, have previously been shown to differ in one amino acid residue at position 40. In this study, no difference was found in immunoreactivity of TpF1 or TyF1 with either syphilis sera or yaws sera. Synthetic peptides based on the sequence of TpF1 and of TyF1 were used in an enzyme-linked immunosorbent assay with syphilis sera and yaws sera. Again, no difference in reactivity between the T. pallidum subsp. pallidum- and T. pallidum subsp. pertenue-derived peptides was observed.
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