One-hundred-and-four isolates of yeast were collected from the vaginas of !I7 outpatients. The isolates were identified by their characteristics in a carbohydrate assimilation test, a serological test and from their morphology.Cundida ufbicuns and Cmdida gfubrutu were the major isolates (75 % and 20 %, respectively). The karyotypes of the isolates were analysed by pulsed-field gel electrophoresis and almost all the karyotypes were distinguishable from one another when the band mobilities were carefully compared. Characteristics and karyotypes were not directly correlated, but seven C. ufbicms isolates (from six patients) had a common atypical karyotype and shared the same phenotype. These isolates are inferred to be generated by a wide genomic reorganization and mutation and the phenotypic changes may be advantageous for survival. The karyotypes of the isolates recovered from individual patients after intervals of 1-6 months were all identical except for one or two highly variable bands which were identified with an rDNA probe. This suggests that the variable bands are too variable to be useful for distinguishing strains, but from the patterns of the identical bands (i.e. except for the variable bands) we concluded that strains from individual patients do not change, at least over short periods. This, coupled with the extensive inter-isolate variability in karyotype, will be useful for Candida source determination and epidemiological studies.
Antigenic components of Candida albicans were extracted from whole ceils with a buffer containing SDS and 2-mercaptoethanol, and separated by SDS-polyacrylamide gel electrophoresis. The components reactive with IgG, IgA, IgM and IgE antibodies in sera from patients with (14 subjects) and without (15 subjects) C. albicans in the vagina, and from healthy females (34 subjects), were investigated by immunoblotting using immunoglobulin class-specific antibodies. Many components reacted with IgG and IgA in all sera tested; the major antigens that reacted strongly with the sera were 67, 62, 29 and 25 kDa components. Several components were observed which reacted with IgM in 63% of the sera; the 67, 62 and 25 kDa components that reacted with IgG and IgA also reacted with IgM. No components reacting with IgE were detected in any of the sera. No striking differences in antibody binding profiles to whole cell antigens were detected among the C. albicans positive and negative patients or the healthy subjects. On the other hand, IgG against extracellular proteinase-was more frequently detected in the C. albicans positive patients than in the C. alb# cans negative group or the healthy subjects. This may suggest that vaginal infection with C. albicans contributes to a rise in anti-proteinase antibody levels.
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