[Rapid identification and susceptibility to killer toxins of yeasts isolated from non-systemic mycoses].
Rapid identification and susceptibility to killer toxins of yeasts isolated from non-systemic mycoses. The use of quick and reliable yeast identification methods, as well as the development of new antifungal agents with more specific targets, will enable a more efficient treatment of mycoses. In the present work, a total of 53 clinical isolates obtained from non-systemic infections in Neuquén Hospitals and an ophthalmologic clinic in Buenos Aires during 2005, were identified by means of a rapid molecular method (ITS1-5.8S ADNr-ITS2 PCR-RFLP). Additionally, the killer susceptibility of the isolates was tested against reference and indigenous killer yeasts on plate tests. Eight yeast species were identified among the clinical isolates: Candida albicans (52%), Candida parapsilosis (17%), Candida tropicalis (10%), Candida krusei (5%), Candida glabrata (4%), Candida guilliermondii (4%), Kluyveromyces lactis (4%) and Saccharomyces cerevisiae (4%). Sixty-nine percent of the isolates corresponding to the predominant species (C. albicans) were related to vaginal infections. On the other hand, 61% of the yeasts associated with ocular infections were identified as C. parapsilosis. Two indigenous killer isolates DVMais5 and HCMeiss5, belonging to Pichia anomala and P. kluyveri respectively, exhibited the broadest killer spectrum against clinical isolates.
Sangorrín
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Departamento de Química, Laboratorio de Microbiología y Biotecnología, Facultad de Ingeniería, Universidad Nacional del Comahue, Buenos Aires 1400 (8300) Neuquén, Argentina.
Lopes
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CA
Rivero
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Caballero
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AC
D002175:Candida / Q000187:drug effects / Q000302:isolation & purification; D002177:Candidiasis / Q000382:microbiology; D002181:Candidiasis, Vulvovaginal / Q000382:microbiology; D025141:Drug Resistance, Fungal; D015821:Eye Infections, Fungal / Q000382:microbiology; D005260:Female; D006801:Humans; D055646:Killer Factors, Yeast; D007716:Kluyveromyces / Q000187:drug effects / Q000302:isolation & purification; D008297:Male; D016533:Mycological Typing Techniques; D009181:Mycoses / Q000382:microbiology*; D009183:Mycotoxins / Q000494:pharmacology*; D011506:Proteins / Q000494:pharmacology*; D012441:Saccharomyces cerevisiae / Q000187:drug effects / Q000302:isolation & purification; D015003:Yeasts / Q000187:drug effects / Q000302:isolation & purification*
D055646:Killer Factors, Yeast; D009183:Mycotoxins; D011506:Proteins; C087906:killer toxin, Pichia