Abstract
Three serial isolates of Candida albicans were obtained from each of five HIV-infected patients with recurrent oropharyngeal candidiasis from the same geographical area. Isolates from one patient remained susceptible to fluconazole whereas serial isolates from the other four patients showed decreasing susceptibilities to the drug. Strain identity was investigated by pulse-field gel electrophoretic (PFGE) separation of chromosomes, restriction fragment length polymorphism (RFLP) of chromosomal DNA, Southern blot analysis with the moderately repetitive probe Ca3 of the materials present in the RFLP gels after transfer to nylon membranes, and random amplification of polymorphic DNA (RAPD). All techniques were able to group isolates obtained from the same patient. Techniques resulting in more complex banding profiles exhibited increased discriminatory power allowing detection of strain variants. Methods resulting in less complex banding patterns, especially Southern hybridization of Sf/l digested chromosomal DNA with the moderately repetitive probe Ca3, were more helpful to determine isogenicity among isolates obtained from the same patient. The combination of results from methods with high discriminatory power (to maximize detection of strain variants) and methods resulting in less complex banding patterns (to allow determination of isogenic isolates) should facilitate the delineation of the epidemiology of C. albicans infection.
Original language | English (US) |
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Pages (from-to) | 49-54 |
Number of pages | 6 |
Journal | Revista Iberoamericana de Micologia |
Volume | 17 |
Issue number | 2 |
State | Published - Jan 1 2000 |
Keywords
- Azole resistance
- Candida albicans
- DNA-typing
ASJC Scopus subject areas
- Microbiology
- Infectious Diseases