genotyping of candida albicans strains obtained from oropharyngealcandidiasis patients based on abc and rps typing systems

Background: candida albicanss has been introduced as one of the mostcommoncauses of nosocomial infections. molecular typingmethods are powerful tools in epidemiology to investigate the infection source of candidiasis, identify the transmission routes, andcontrol the measures.objectives: this study aimed for genotyping c. albicans species isolated from oral cavities of the non-hiv patients who suffer fromoropharyngeal candidiasis via combined abc and repeat sequences (rps) typing systems.methods: in this study, 31 dna samples of clinical isolates of c. albicans were evaluated in terms of 25s ribosomal dna region sequenceor abc typing, and alt repeats numbers within rps. dna was amplified in two separate reactions, and the pcr productswere electrophoresed to identify the genotypes of the isolates. based on the band’s pattern, phylogenetic analysis was conductedby upgma, and the discriminatory power of abc and rps typing was measured by simpson’s index of diversity.results: genotype a with (14 isolates, 45.2%) were the most frequent and followed by genotype b (10 isolates, 32.3%) and genotypec (7 isolates, 22.6%), respectively. in addition, genotype 3 with 25 isolates (80.6%) were the most prevalent, followed by genotype2/3 (4 isolates, 12.9%) and genotype 3/4 (2 isolates, 6.5%) respectively. no significant relationship was found between the obtainedgenotypes and drug-resistant isolates (p < 0.05).conclusions: this study showed that 25s rdna and rps typing is a quick, simple, and cost-effective method with average discriminatorypower and good reproducibility for c. albicans genotyping. it can be used for the epidemiology of c. albicans infections.