Characterization of Candida spp. isolated from the bloodstream in a reference hospital in Brazil: using MALDI-TOF/MS to identify unusual species of Candida
DOI:
https://doi.org/10.33448/rsd-v11i11.33243Keywords:
Candidemia; MALDI-TOF/MS; Antifungal agents; Mortality.Abstract
Candidemia is a health problem with a high mortality rate. The aims of this study were to compare the identification of Candida spp. via traditional methodologies and mass spectrometry (MALDI-TOF/MS) in order to verify the antifungal susceptibility profile of these isolates and analyze the clinical evolution of patients. This was a two-year prospective cohort conducted at the Hospital de Clínicas de Uberlândia (HCU-UFU). Candida spp. were identified via VITEK®-2 and MALDI-TOF/MS. Antifungal susceptibility tests were conducted via VITEK®-2. Clinical-demographic data were assessed from medical records and variables were described as mean, standard deviation, frequency and percentage, and risk factors were evaluated using univariate and multivariate analysis. A total of 113 patients and 126 Candida spp. isolates were studied. C. albicans was most frequent (30%); MALDI-TOF/MS identified unusual species, including misidentification of C. famata. Most of the isolates (95%) were susceptible to the tested antifungals. Most patients were men (65%) and older than 60 years of age (45%); 85% of patients were treated with fluconazole. The 30-day mortality rate was 56%; patients who did not receive treatment and those who started later had a lower survival rate (p <0.0001). MALDI-TOF/MS was able to identify unusual Candida spp. Candidemia presented a high mortality rate; the correct identification of Candida spp. and the introduction of appropriate and timely therapy are essential for increasing patient survival.
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