DNA microsatellite genotyping of potentially pathogenic Candida albicans and C. dubliniensis isolated from the oral cavity and dental prostheses

• Published in: Microbial pathogenesis Vol. 149; p. 104548
• Main Authors: Rodrigues Netto, Manoel Francisco, Júnior da Silva, Jeferson, Andrielle da Silva, Thaísla, Oliveira, Mateus Cardoso, Höfling, José Francisco, de Andrade Bressan, Eduardo, Vargas de Oliveira Figueira, Antonio, Gomes Boriollo, Marcelo Fabiano
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2020
• Subjects: Antifungal resistance; C. albicans; Candida albicans; Candida species; Dental prostheses; DNA; DNA microsatellites; extracellular enzymes; genetic variation; genotyping; microsatellite repeats; mouth; mucosa; oral hygiene; pathogenesis; Secreted aspartyl proteinases and phospholipases; virulence; Antifungal resistance; Dental prostheses; Secreted aspartyl proteinases and phospholipases; Candida species; C. albicans; DNA microsatellites
• ISSN: 0882-4010; 1096-1208; 1096-1208
• DOI: 10.1016/j.micpath.2020.104548

This study investigated the incidence, genetic diversity, antifungal sensitivity, and virulence of Candida albicans and C. dubliniensis isolated from subjects using dental prostheses and subjects clinically indicated for the first prosthetic rehabilitation. Subjects were divided into four groups and samples were collected twice: at first rehabilitation by removable partial (A) and total (C) dental prostheses, and replacement of the removable partial (B) and total (D) prostheses. Yeasts were genotyped using DNA microsatellite markers. Microbiological methods were used to screen for azole antifungal resistance and exoenzyme production. In the initial sampling, oral colonization by Candida was observed in 31 (53.4%) subjects in groups A (33.3%), B (68.2%), and D (65%); 20 (47.6%) subjects displayed colonization of prostheses: groups B (50%) and D (45%). The second sampling (±30 days) revealed Candida in 2 (3.4%: oral cavity) and 4 (6.9%: prosthetic) subjects from group B. C. albicans and C. dubliniensis displayed both polyclonal and monoclonal patterns of infection. Azole-resistant C. albicans and SAPs+ strains were prevalent. Related strains were found in one or several oral sites (mucosa and prosthesis), as well as intra- and inter-subject, -gender, -group, and –time of sampling. However, the patterns of clonality can be altered under dental care.