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. 1991 Nov-Dec;14(6):459-64.
doi: 10.1016/0732-8893(91)90001-v.

Use of rDNA restriction fragment length polymorphisms to differentiate strains of Candida albicans in women with vulvovaginal candidiasis

G E Stein  1 , V L Sheridan, B B Magee, P T Magee
Affiliations

Use of rDNA restriction fragment length polymorphisms to differentiate strains of Candida albicans in women with vulvovaginal candidiasis

G E Stein et al. Diagn Microbiol Infect Dis. 1991 Nov-Dec.

Abstract

Epidemiologic studies in women with recurrent Candida vaginitis have been hampered in the past by the lack of a reproducible typing system. Several molecular probes have now been developed that have the ability to differentiate strains of Candida albicans and give reproducible results. In this investigation, 24 women with Candida vaginitis were studied in a longitudinal fashion for 30 days following short-course antifungal therapy. Seven women with either recurrent vaginitis or with multiple culture-positive sites with C. albicans were included in an epidemiological study. A total of 18 isolates of C. albicans (12 vaginal and six rectal) were typed utilizing restriction fragment length polymorphisms of rDNA. This technique was able to differentiate five different strains of C. albicans. Our epidemiologic study revealed that vaginal and rectal strains recovered from the same women were usually different. None of our patients had a similar vaginal and rectal strain prior to treatment, and only one patient had the same strain isolated from both the rectum and the vagina at the time of recurrence. On the other hand, we found that the same strain of C. albicans was initially and later recovered from the vagina in four of five women who failed treatment or developed recurrent vaginitis. These results suggest that recurrent episodes of C. albicans vaginitis, following short-course antifungal therapy, are often due to relapse of the original infecting strain and not due to autoinoculation from the rectum.(ABSTRACT TRUNCATED AT 250 WORDS)

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