In Vitro Antifungal Susceptibility of Species Isolated from Iranian Patients with Denture Stomatitis.

BACKGROUND

-associated denture stomatitis (CADS) is a common fungal infection in people who wear dentures. The main objective of this study was to make molecular identification of causative agents of CADS and in vitro antifungal susceptibility testing (AFST) in the Iranian patients with denture stomatitis.

METHODS

A total of 134 spp. were obtained from patients with denture stomatitis. The spp. were identified using a polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) involving the universal internal transcribed spacer (ITS1 and ITS4) primers, which were subjected to digestion with MspI and BlnI restriction enzymes. The in vitro antifungal susceptibility of spp. to fluconazole (FLC), terbinafine (TRB), itraconazole (ITC), voriconazole (VRC), posaconazole (POS), ketoconazole (KET), amphotericin B (AMB), and caspofungin (CAS) was evaluated using the Clinical and Laboratory Standards Institute M27-A3 and M27-S4 guidelines.

RESULTS

Overall, was the most commonly isolated species ( = 84; 62.6%), followed by ( = 23; 17.2%), ( = 16; 12%), and ( = 11; 8.2%). Posaconazole had the lowest geometric mean minimum inhibitory concentration (MIC) (0.03 g/ml), followed by AMB (0.05 g/ml), ITC (0.08 g/ml), VRC (0.11 g/ml), CAS (0.12 g/ml), KET (0.15 g/ml), and FLC (0.26 g/ml).

DISCUSSION

Our study showed that was most prevalent in Iranian patients with CADS and was susceptible to both azoles and amphotericin B. In addition, POS could be an appropriate alternative to the current antifungal agents used for the treatment of CADS, as well as in the treatment of recurrent candidiasis.