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Comparative in vitro activities of seven antifungal drugs against clinical isolates of Candida parapsilosis complex.

Abstract：

OBJECTIVE:Candida parapsilosis species complex, an important set of non-albicans Candida species, is known to cause candidaemia particularly in neonates and infants. However, the incidence has increased in recent years, owing to higher numbers of at individuals at risk for these infections. Our objective was to evaluate the in vitro susceptibility of clinical isolates of C. parapsilosis complex isolates from Iran to seven antifungal drugs. MATERIAL AND METHODS:One hundred-one clinical isolates of C. parapsilosis species complex cultured from humans were included. Species identification had been previously confirmed by combined phenotypic characteristics, matrix-assisted laser desorption ionization-time of flight mass spectrometry-based assay and reconfirmed by DNA sequence analysis of the ITS rDNA region and D1/D2 gene. Minimum inhibitory concentrations (MICs) for amphotericin B, fluconazole, itraconazole, voriconazole, posaconazole, micafungin and anidulafungin were determined against well-characterized isolates by broth microdilution susceptibility testing according to the CLSI M27-A3 guideline. RESULTS:Species identifications were performed on 101 isolates, of which 88 (87.2%) C. parapsilosis sensu stricto and 13 (12.8%) C. orthopsilosis. Amphotericin B and posaconazole were the most active drugs with 100% of isolates being wild-type (WT). Voriconazole and micafungin, 99% of isolates were WT. The low activity was recorded for fluconazole and itraconazole with 93.1% and 89.1% of isolates being WT, respectively. At the species level, all Candida parapsilosis sensu stricto isolates were WT to amphotericin B and posaconazole and all Candida orthopsilosis isolates were WT to amphotericin B, voriconazole, posaconazole, anidulafungin and micafungin. In contrast, the highest rate of non-WT was observed in C. orthopsilosis to itraconazole (4 of 13, 30.8%). CONCLUSIONS:Although almost all of the tested drugs demonstrated potent activity against C. parapsilosis species complex, it seems that more especially C. orthopsilosis isolates had decreased susceptibility to itraconazole. Further studies are needed to determine how these findings may switch into in vivo efficacy.

journal_name

J Mycol Med

journal_title

Journal de mycologie medicale

authors

Khodavaisy S,Badali H,Meis JF,Modiri M,Mahmoudi S,Abtahi H,Salehi M,Dehghan Manshadi SA,Aala F,Agha Kuchak Afshari S,Lotfali E,Ahangarkani F,Rezaie S

doi

10.1016/j.mycmed.2020.100968

subject

Has Abstract

pub_date

2020-09-01 00:00:00

pages

100968

issue

eissn

1156-5233

issn

1773-0449

pii

S1156-5233(20)30066-4

journal_volume

pub_type

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Comparative in vitro activities of seven antifungal drugs against clinical isolates of Candida parapsilosis complex.