,Etiology of invasive candidosis agents in Russia: a multicenter epidemiological survey

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A multicenter prospective epidemiological survey on the etiologic agents of invasive candidosis was conducted in Russia in the period of 2012-2014.Samples were collected from 284 patients with invasive candidosis and Candida species isolated by culture.The species were identified by DNA sequencing and MALDI-TOF massspectrometry.A total of 322 isolates were recovered,in which 96% of Candida species belonged to six major species,namely,C albicans (43.2%),C.parapsilosis (20.2%),C.glabrata (11.5%),C.tropicalis (9.6%),C.krusei (6.2%),and C.guilliermondii (5.3%).Most Candida species were isolated from blood samples (83.23%).Notably,the prevalence rate of C.albicans reduced from 52.38% to 32.79% (2012 vs.2014) (P =0.01) whereas that of non-C.albicans increased from 47.62% (2012) to 67.21% (2014) (P < 0.01).Species distribution differed among geographical regions;specifically,the prevalence rate of C.albicans as an etiologic agent of invasive candidosis in Siberian Federal region was significantly higher than that in other Federal regions.Results indicated a shift from C.albicans to non-C,albicans.Therefore,a detailed investigation on the contributing factors and appropriate treatment of invasive candidosis is needed.
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