Estudo da atividade antifúngica in vitro do óleo essancial de Schinus terebinthifolius Raddi contra espécies de Candida isoladads da cavidade bucal de usuários de prótese

• Autor(a) principal: Pérez, Ana Luiza Alves de Lima
• Data de Publicação: 2016
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Biblioteca Digital de Teses e Dissertações da UFPB
• Texto Completo: https://repositorio.ufpb.br/jspui/handle/tede/8859
• topic: Prótese Dentária.; Candidíase Bucal.; Plantas Medicinais.; Fitoterapia.; Dental Prosthesis.; Candidiasis.; Oral.; Plants.; Medicinal.; Phytotherapy.; CIENCIAS DA SAUDE::ODONTOLOGIA

Introduction: The phytotherapy has encouraged the evaluation of different herbal products activity to control dental problems, by creating new strategies for the chemical control of oral cavity infections, in an attempt to overcome the drawbacks and weaknesses of market products. Objective: To isolate, identify Candida genus yeasts from denture wearers (removable partial dentures or complete dentures) and evaluate the in vitro antifungal activity of an essential oil extracted from the leaves of Schinus terebinthifolius Raddi. Materials and Methods: It was collected biological material from 23 prosthesis wearers and the identification of yeasts was based on macro and micro-morphology, physiological and biochemical tests. In the antifungal activity tests of S. terebinthifolius Raddi was used four strains of Candida albicans (C. albicans LM-1A, C. albicans LM-3A, C. albicans LM-16B, C. albicans LM-19A), four strains of Candida tropicalis (C. tropicalis LM-2A, C. tropicalis LM-7A, C. tropicalis LM-11A, C. tropicalis LM-13A) of yeasts isolated and identified by biological material collect and standard strains of the american collection ATCC (American Type Culture Collection): C. albicans ATCC 76485 and C. tropicalis ATCC 13803. The sensitivity profile to synthetic antifungal was evaluated by diffusion technique in solid medium suitable for antifungal susceptibility test. The antifungal agents used were amphotericin B (100 μg), fluconazole (25 μg), itraconazole (10 μg), miconazole (50 μg), nystatin (100 I.U.), ketoconazole (50 μg). It was determined the minimum inhibitory concentration (MIC) of essential oil by the microdilution technique and calculated the minimum fungicidal concentration (MFC) by subculture on Sabouraud Dextrose Agar (SDA). Results: Most of the denture wearers were female (78%) and the average age was 48 years and two months. C. albicans and C. tropicalis were the most prevalent species in samples taken in the palatal mucosa (17.39% each) and the bases of prostheses (21.73% each). The antifungal that all strains tested were sensitive to was amphotericin B followed by nystatin, ketoconazole and miconazole with respectively 90%, 80%, 50% of the susceptible strains. Most strains (90%) were resistant to fluconazole and all were to itraconazole. The MIC values varied from 128μg/mL to 256μg/mL, being determined the MIC100% as 256μg/mL. For nystatin, the MIC100% was 16μg/mL. The MFC/MIC ratio indicates fungicidal activity against 80% of the strains tested and is considered fungistatic against C. tropicalis LM-7A and C. tropicalis LM-13A. For nystatin, indicated fungicidal activity against all tested strains. Conclusion: The most prevalent species in denture wearers were C. albicans and C. tropicalis, with a varied susceptibility profile compared to synthetic antifungal, highlighting a pattern of resistance of some strains, particularly to fluconazole and itraconazole. The essential oil of S. terebinthifolius Raddi showed fungicidal activity against most of the strains tested.