Abstract
SILVA, V. C. S. Antimicrobial assessment of mouthwashes and antifungals against Candida spp. isolated in the saliva of cancer patients. 2009. 98 f. Thesis (Masters) – University of Sao Paulo at Ribeirao Preto College of Nursing, Ribeirao Preto, 2009. The occurrence of Candida spp. is a threat to the oral health of cancer patients undergoing antineoplastic treatment. This study described the clinical variables of cancer patients with or without Candida spp. in the saliva; determined the prevalence of these strains, and assessed mouthwashes’ antimicrobial activity and the sensitivity profile to antifungals. Saliva samples of cancer patients, with or without mucositis, were collected. Saliva was subject to serial decimal dilution up to 10 and sowed in culture (CHROMagar Candida) to quantify the number of colony forming units per milliliter of saliva (CFU/mL). Specific biochemical tests were also done to identify the species. The Maximum Inhibitory Dilution (MID) was used to assess the antimicrobial activity of the mouthwashes (Periogard, Cepacol Cool Ice and 0.12% Chlorhexidine). The sensitivity profile of the strains as to amphotericin B and fluconazole was done by the Minimum Inhibitory Concentration (MIC), using Etest strips. Non-parametric McNemar and Wilcoxon tests were used for statistical analysis, with level of significance (α= 0.05). Of the 34 patients, 79.4% were male and 19 (55.9%) had mucositis. 9(26.5%) tested positive for Candida spp. in the saliva. Regarding the diversity of species, the study evidenced 12 different strains of Candida spp., 7 (20.6%) C. albicans, 3(8.8%) C. glabrata and 2 (5.9%) C. tropicalis. Mucositis was more common in patients with Candida, 66.7%. Comparing the MID results, it was verified that Cepacol Cool Ice presented better results than other products. The worst activity was presented by 0.12% Chlorhexidine, 4(11.8%) of the strains were not inhibited at 1:10 dilution. As to the sensitivity profile, all strains were sensitive to amphotericin B and 2 (5.9%) strains of Candida glabrata were Dose-Dependent Sensitive to fluconazole. Additional research is needed to broaden the scientific evidences of the use of antiseptics in the maintenance of these patients’ oral heath, especially considering the high risk of mucositis.
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