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Prevalence and drug susceptibility of clinical Candida species in nasopharyngeal cancer patients in Vietnam.

ABSTRACT: In the nature, Candida species are normal inhabitants and can be observed in a wide variety of vertebrates. In humans, especially for cancer patients who fall prey to opportunistic pathogens, this group of susceptible multi-drug resistant and biofilm-forming yeasts, are among the commonest ones. In this study, Candida species in 76 oral lesion samples from Vietnamese nasopharyngeal-cancer patients were isolated, morphologically identified using CHROMagar™, germ tube formation, and chlamydospore formation tests, and molecularly confirmed by PCR-RFLP. The drug susceptibility of these isolates was then tested, and the gene ERG11 was DNA sequenced to investigate the mechanism of resistance. The results showed that Candida albicans remained the most prevalent species (63.16% of the cases), followed by Candida glabrata, Candida tropicalis, and Candida krusei. The rates of resistance of non-albicans Candida for tested drugs were 85.71%, 53.57%, and 57.14% to fluconazole, clotrimazole, and miconazole, respectively. Although the drug-resistance rate of Candida albicans was lower than that of non-albicans Candida, it was higher than expected, suggesting an emerging drug-resistance phenomenon. Furthermore, ERG11 DNA sequencing revealed different mutations (especially K128T), implying the presence of multiple resistance mechanisms. Altogether, the results indicate an alarming drug-resistance situation in Candida species in Vietnamese cancer patients and emphasize the importance of species identification and their drug susceptibility prior to treatment.

SUBMITTER: Nguyen BVG

PROVIDER: S-EPMC10761778 | biostudies-literature | 2024 Jun

REPOSITORIES: biostudies-literature

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Prevalence and drug susceptibility of clinical Candida species in nasopharyngeal cancer patients in Vietnam.

Nguyen Bac V G BVG Nguyen Hau H N HHN Vo Thanh-Hoa TH Le Minh-Tri MT Tran-Nguyen Viet-Khoa VK Vu Thao Thanh TT Nguyen Phuoc-Vinh PV

One health (Amsterdam, Netherlands) 20231203

In the nature, Candida species are normal inhabitants and can be observed in a wide variety of vertebrates. In humans, especially for cancer patients who fall prey to opportunistic pathogens, this group of susceptible multi-drug resistant and biofilm-forming yeasts, are among the commonest ones. In this study, Candida species in 76 oral lesion samples from Vietnamese nasopharyngeal-cancer patients were isolated, morphologically identified using CHROMagar™, germ tube formation, and ...[more]

PMID: 38179314

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Dataset Information

Prevalence and drug susceptibility of clinical Candida species in nasopharyngeal cancer patients in Vietnam.

Publications

Prevalence and drug susceptibility of clinical <i>Candida</i> species in nasopharyngeal cancer patients in Vietnam.

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