title: Evaluation of Fluorescent Capillary Electrophoresis for Rapid Identification of Candida Fungal Infections.
abstract: Early diagnosis of fungal infection is critical for initiating antifungal therapy and reducing the high mortality rate in immunocompromised patients. In this study, we focused on rapid and sensitive identification of clinically important Candida species, utilizing the variability in the length of the ITS2 rRNA gene and fluorescent capillary electrophoresis (f-ITS2-PCR-CE). The method was developed and optimized on 29 various Candida reference strains from which 26 Candida species were clearly identified, while Candida guilliermondii, C. fermentati, and C. carpophila, which are closely related, could not be distinguished. The method was subsequently validated on 143 blinded monofungal clinical isolates (comprising 26 species) and was able to identify 88% of species unambiguously. This indicated a higher resolution power than the classical phenotypic approach which correctly identified 73%. Finally, the culture-independent potential of this technique was addressed by the analysis of 55 retrospective DNA samples extracted directly from clinical material. The method showed 100% sensitivity and specificity compared to those of the combined results of cultivation and panfungal PCR followed by sequencing used as a gold standard. In conclusion, this newly developed f-ITS2-PCR-CE analytical approach was shown to be a fast, sensitive, and highly reproducible tool for both culture-dependent and culture-independent identification of clinically important Candida strains, including species of the "psilosis" complex.
authors.affiliation: Centre for Cardiovascular Surgery and Transplantation Brno, Genetics Laboratory, Brno, Czech Republic Molecular Immunology and Microbiology, Central European Institute of Technology, Masaryk University Brno, Brno, Czech Republic.
authors.forename: Hana
authors.initials: H
authors.lastname: Obručová
authors.affiliation: Centre for Cardiovascular Surgery and Transplantation Brno, Genetics Laboratory, Brno, Czech Republic.
authors.forename: Radka
authors.initials: R
authors.lastname: Tihelková
authors.affiliation: Centre for Cardiovascular Surgery and Transplantation Brno, Genetics Laboratory, Brno, Czech Republic Molecular Immunology and Microbiology, Central European Institute of Technology, Masaryk University Brno, Brno, Czech Republic.
authors.forename: Iva
authors.initials: I
authors.lastname: Kotásková
authors.affiliation: Department of Microbiology, Faculty of Medicine, Masaryk University and St. Anne's University Hospital Brno, Brno, Czech Republic.
authors.forename: Filip
authors.initials: F
authors.lastname: Růžička
authors.affiliation: Department of Microbiology, Faculty of Medicine, Masaryk University and St. Anne's University Hospital Brno, Brno, Czech Republic.
authors.forename: Veronika
authors.initials: V
authors.lastname: Holá
authors.affiliation: Centre for Cardiovascular Surgery and Transplantation Brno, Genetics Laboratory, Brno, Czech Republic International Clinical Research Centre, St. Anne's University Hospital Brno, Brno, Czech Republic.
authors.forename: Eva
authors.initials: E
authors.lastname: Němcová
authors.affiliation: Centre for Cardiovascular Surgery and Transplantation Brno, Genetics Laboratory, Brno, Czech Republic Molecular Immunology and Microbiology, Central European Institute of Technology, Masaryk University Brno, Brno, Czech Republic tomas.freiberger@cktch.cz.
authors.forename: Tomáš
authors.initials: T
authors.lastname: Freiberger
mesh_terms: D002175:Candida / Q000302:isolation & purification*; D002177:Candidiasis / Q000175:diagnosis*; D004271:DNA, Fungal / Q000737:chemistry / Q000235:genetics; D021903:DNA, Ribosomal Spacer / Q000737:chemistry / Q000235:genetics; D019075:Electrophoresis, Capillary / Q000379:methods*; D006801:Humans; D008828:Microbiological Techniques / Q000379:methods*; D016133:Polymerase Chain Reaction / Q000379:methods*; D012680:Sensitivity and Specificity; D013997:Time Factors
chemical_list: D004271:DNA, Fungal; D021903:DNA, Ribosomal Spacer