Superficial Fungal Infections in Patients with Hematologic Malignancies: A Case-Control Study.

Background and Design: Dermatophytes, yeasts and some moulds settle on the skin and mucosal surfaces in immunocompetent individuals as commensals. Patients with diabetes mellitus, HIV-positive patients, organ transplant recipients and the patients with malignancies are predisposed to develop superficial fungal infections. We aimed to determine the prevalence, clinical and mycological features of superficial fungal infections in patients with hematologic malignancies in this case-control study. Material and Method: Eighty patients with hematologic malignancies (49 men, 31 women) and 50 healthy individuals (22 men, 28 women) randomly selected at our clinical department as controls were included to this study between 2003 and 2004. The mean age was 52±1.85 years in patients and 41.56±2.04 years in controls. All patients were inspected for superficial fungal infections. Skin scrapings and mucosal swabs were obtained from the toe web, inguinal region, any suspicious lesion and oral mucosa. Nail samples were also collected. All samples were examined by direct microscopy and cultured in Sabouraud dextrose agar (SDA). The yeasts were established in germ-tube production. Results: Fifty-six (70%) of 80 patients with hematologic malignancies had fungal colonization, whereas 21 (42%) of 50 controls had. For both groups, oral mucosa was the predominant area that fungus was mostly isolated from. A rising number of non-dermatophyte moulds (26%) was observed. Candida albicans was the predominant agent isolated from the culture. Conclusion: The prevalence of superficial fungal infection was higher in patients with hematologic malignancies (being immunosuppressed) than in the normal population. Candida albicans was the predominant isolated agent that was found in our study. We observed oral mucosa candidal infection mostly. The rising number of non-dermatophyte moulds is attributed to long-term use of antibiotics, cytotoxic chemotherapies and antifungals. [ABSTRACT FROM AUTHOR]