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Volume 63, Issue 11

Genetic relatedness among vaginal and anal isolates of from women with vulvovaginal candidiasis in north-east Brazil Free

Abstract

Vulvovaginal candidiasis (VVC) is one of the most common causes of vaginitis and affects about 75 % of women of reproductive age. In order to better understand the epidemiology and pathogenesis of this disease, we evaluated genetic relatedness among 62 clinical isolates of sequentially obtained from the anus and vagina of patients with sporadic and recurrent VVC. Evaluation of patients’ demographic and clinical data, direct examination, and colony forming units (c.f.u.) counts of vaginal and anal samples were also performed. The genotypes of strains were determined with ABC genotyping and Randomly Amplified Polymorphic DNA (RAPD). Genotype A was the most prevalent (93.6 %), followed by genotype C (6.4 %), whereas genotype B was not found. We found the maintenance of the same ABC genotype, regardless of the body site of each patient. Most of the vaginal strains suffered microevolution, whereas most of the anal strains were replaced during the period of study. Vaginal and anal isolates of obtained simultaneously from the same patient showed the same ABC genotype and high genetic similarity as determined by RAPD. Genotype A seemed to be dominant in both vaginal and anal isolates of patients with VVC. Our results corroborate the hypothesis that there are ‘substrains’ of the vaginal clone successfully established, which dominate in an apparently random manner over the course of time. It is suggested that the anal reservoir constitutes a possible source for vaginal infection in most of the cases.

  • Received:
  • Accepted:
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© 2014 The Authors
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2014-11-01
2024-04-16
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Genetic relatedness among vaginal and anal isolates of Candida albicans from women with vulvovaginal candidiasis in north-east Brazil
J. Med. Microbiol. 63, 1436 (2014); https://doi.org/10.1099/jmm.0.076604-0
/content/journal/jmm/10.1099/jmm.0.076604-0
/content/journal/jmm/10.1099/jmm.0.076604-0
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