Molecular Speciation and Antifungal Susceptibility Profile of Candida Species in a Tertiary Care Centre in Central Kerala.

ABSTRACT

Candidiasis is a common life-threatening condition with various clinical manifestations. It can cause significant morbidity and mortality, especially in critically ill patients. Though mainly caused by C. albicans, it has shown a change in the epidemiological pattern with an increase in the prevalence of non albicans Candida (NAC) in the recent years. This change has also reflected in the profile of antifungal susceptibility since many of these species show high level of antifungal resistance associated with treatment failures. Thus, it is important to know the regional distribution of Candida species and also find their antifungal susceptibility profile to the commonly used antifungal agents.METHODSThis is a descriptive study conducted for a period of two years on the clinical isolates of Candida species which satisfied the inclusion and exclusion criteria. Speciation was done by phenotypic methods which include germ tube test, chromogenic medium, corn meal agar and VITEK-2 system and by molecular methods using multiplex PCR. Antifungal susceptibility testing was done using automated method by VITEK-2 compact system.RESULTSAmong the 80 isolates studied, on speciation C .albicans 25(31.25%) was the most common, followed by C. tropicalis 23 (28.75%), C. parapsilosis 13 (16.25%), C. krusei 12 (15%), C. pelliculosa 4 (5%), C. auris 2 (2.5%) and C. glabrata 1 (1.25%). Most isolates were susceptible to almost all the antifungal agents tested, but C. krusei showed high level of resistance.CONCLUSIONSC. albicans was the commonest individual species, but there was an overall predominance of non-albicans Candida (NAC). Speciation of Candida isolates is important as there is wide variation in their antifungal resistance pattern. Knowledge about the prevalent species and their antifungal susceptibility will help in early initiation of appropriate treatment, thus reducing the morbidity and mortality associated with Candida infections.