Yeast flora of the mouth and skin uring and after irradiation or oral and laryngeal cancer

Departments of Oral Pathology, School of Clinical Dentistry, University of Sheffield, 31 Claremont Crescent, Sheffield S10 2TA * Dental Surgery, School of Clinical Dentistry, University of Sheffield, 31 Claremont Crescent, Sheffield S10 2TA Received April 7, 1981 Accepted May 15, 1981 SUMMARY. The quantitative and qualitative changes occurring in the fungal flora of 22 patients with oral and 9 with laryngeal carcinoma were studied during and after radiation therapy. Each patient received 6000 rad of externally applied radiation in divided doses for 5 weeks. The fungal flora was isolated from the patients' oral cavity and irradiated skin sites during irradiation and 2 weeks and 4–6 months afterwards. The number and types of fungi increased in both groups of patients after the start of irradiation and persisted at high levels for at least 4–6 months after treatment. Candida albicans and C. tropicalis were the principal yeasts isolated throughout the period studied but seven other species were also identified. All the yeast isolates were sensitive in vitro to miconazole, ketoconazole, amphotericin B and nystatin. Any of these antifungal agents should be appropriate for therapy.