title: Candida albicans: Frequency and characterization in oral cancer (Stage I) from smokers and drinkers.
abstract: The frequency and the biotype of Candida albicans, from patients with epidermoid carcinoma of the oral mucosa (stage I) were evaluated. The patients chosen were habitual drinkers and smokers, aged 34 to 81 years who had not submitted previously to any treatment. They exhibited ulcero-vegetative lesions, mainly on the floor of the mouth, palate and tongue and were classified as stage TNM 100 - TNM 200. Samples from the buccal mucosa were collected for mycological study including: identification of yeasts, serotyping, determination of exo-enzymes as proteinase and phospholipase as well as "killer" assay for biotype characterization. Positive cultives for yeasts were observed in 51.5% of the patients(17/33), being 21.2% represented by C. albicans, all serotype A. The "killer" test demonstrated two different biotypes of C. albicans, namely 211(71.4%) and 611(28.6%), with high levels of proteinase (Prz < 0.30), while phospholipase presented intermediary levels (Pz > 0.29 and =/< 0.69). These data suggested a potentiality to virulence of C. albicans, although did not show an association of a particular biotype with the carcinogenic factors present or with the development of oral epidermoid carcinoma in this initial stage.
authors.affiliation: School of Dentistry, University of São Paulo, São Paulo, Brazil. egbirman@siso.fo.usp.br.
authors.forename: E G
authors.initials: EG
authors.lastname: Birman
authors.forename: S
authors.initials: S
authors.lastname: Kignel
authors.forename: F R
authors.initials: FR
authors.lastname: Da Silveira
authors.forename: C R
authors.initials: CR
authors.lastname: Paula