Epidemiology and antifungal susceptibilities of yeast isolates causing invasive infections across urban Beijing, China

Future Microbiol. 2017 Sep:12:1075-1086. doi: 10.2217/fmb-2017-0036. Epub 2017 Aug 24.

Abstract

Aim: To investigate the species distribution and antifungal susceptibility profiles of yeast isolates causing invasive infections across Beijing.

Materials & methods: A total of 1201 yeast isolates recovered from blood and other sterile body fluids were correctly identified by matrix-assisted laser desorption/ionization TOF MS supplemented by DNA sequencing. Antifungal susceptibility testing was performed according to the Clinical and Laboratory Standards Institute broth microdilution method.

Results: Candida (95.5%) remained the most common yeast species isolated; Candida albicans (38.8%) and Candida parapsilosis (22.6%) were the leading species of candidemia. Azole resistances were mainly observed in Candida glabrata and Candida tropicalis isolates.

Conclusion: This study outlined the epidemiologic data of invasive yeast infections and highlighted the need for continuous monitoring of azole resistances among C. glabrata and C. tropicalis isolates in Beijing.

Keywords: antifungal susceptibilities; epidemiology; invasive yeast infection.

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Amphotericin B / pharmacology
  • Antifungal Agents
  • Beijing / epidemiology
  • Candida / drug effects
  • Candida / genetics
  • Candida / isolation & purification
  • Candida / pathogenicity
  • Candida albicans / drug effects
  • Candida albicans / genetics
  • Candida albicans / isolation & purification
  • Candida albicans / pathogenicity
  • Candida glabrata / drug effects
  • Candida glabrata / genetics
  • Candida glabrata / isolation & purification
  • Candida glabrata / pathogenicity
  • Candida parapsilosis / drug effects
  • Candida parapsilosis / genetics
  • Candida parapsilosis / isolation & purification
  • Candida parapsilosis / pathogenicity
  • Candida tropicalis / drug effects
  • Candida tropicalis / genetics
  • Candida tropicalis / isolation & purification
  • Candida tropicalis / pathogenicity
  • Candidemia / epidemiology
  • Candidemia / microbiology
  • Candidiasis, Invasive / epidemiology*
  • Candidiasis, Invasive / microbiology*
  • Child
  • Child, Preschool
  • Drug Resistance, Fungal / drug effects
  • Echinocandins / pharmacology
  • Epidemiological Monitoring
  • Female
  • Humans
  • Infant
  • Infant, Newborn
  • Male
  • Microbial Sensitivity Tests / methods*
  • Middle Aged
  • Sequence Analysis, DNA
  • Triazoles / pharmacology
  • Yeasts / drug effects*
  • Yeasts / genetics
  • Yeasts / isolation & purification*
  • Yeasts / pathogenicity
  • Young Adult

Substances

  • Antifungal Agents
  • Echinocandins
  • Triazoles
  • Amphotericin B