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. 2017 Oct 13;8:1927. doi: 10.3389/fmicb.2017.01927

Table 2.

Molecular methods and proteomics for the identification and genotyping of Candida tropicalis.

Method Principle Advantages Disadvantages References
Proteomics Protein profile by mass spectrophotometry Uses an ionizing matrix and has been assembled to automated methods of microorganisms identification such as MALDI Biotyper and VITEK-MS and several other mass spectrometer Simple methodology of easy sample preparation and short time for analysis, more efficient than the conventional methods, accurate identification Higher cost of equipment, necessity for specialized training; possible lack of a robust database Chao et al., 2014; Angeletti et al., 2015; Panda et al., 2015; Sariguzel et al., 2015; Keceli et al., 2016; Stefaniuk et al., 2016
Molecular identification Molecular rDNA sequencing Based on the ability of DNA polymerase to copy a DNA strand from the template in the presence of a primer. The inclusion of fluorescent markers with different colors allows the differentiation of the chains truncated by the respective fluorescence Robust technique, automated, Higher accuracy, gold standard identification Requirement for specialized equipment, expensive reagents, and highly trained personnel Pincus et al., 2007
PNA-FISH Based on the use peptide nucleic acid probes directed to specific rRNA species of the main Candida species tagged with fluorescent dyes High sensitivity and specificity There may be some problem in discriminating closely related microorganisms Stender, 2003; Hall et al., 2012; Stone et al., 2013; Calderaro et al., 2014; Gorton et al., 2014; Aydemir et al., 2016
Genotyping Randomly Amplified Polymorphic DNA (RAPD) Based on the amplification of DNA fragments by polymerase chain reaction (PCR) by using shortprimers containing random sequences Fast, simple and low-cost method for detecting polymorphisms; Does not require radioactively labeled probes; use of arbitrary primers, no need of initial genetic or genomic information, and the requirement of only tiny quantities of target DNA Dominant technique; low reproducibility and low discriminatory power; difficult standardization, possible problems of interpretation Wu et al., 2014; Almeida et al., 2015
Microsatellites analysis Based on the amplification by PCR of small tandem sequence repeats from 2 to 6 highly polymorphic nucleotides, present on chromosomal telomeric regions Easy execution, reproducible, appropriate for large-scale epidemiological studies, good discriminatory power; Technical challenges during the construction of enriched libraries and species-specific primers
Multilocus Sequence Typing (MLST) Based on the amplification of 6–10 housekeeping genes by PCR, with further PCR products purification and gene sequencing. Gene sequencing generates the sequence type (ST) for haploid organisms and diploid sequence types (DST) for the diploids microorganisms, which also may be compared to a database Robust technique with high discriminatory power, excellent reproducibility, easy standardization; data that can be shared and compared between different laboratories easily through the Internet Requirement for specialized equipment, expensive reagents, and highly trained personnel; phylogenetic relationships and resolution of clones can be masked by the use of slowly evolving housekeeping genes Maiden et al., 1998; Tavanti et al., 2005; Odds and Jacobsen, 2008; Chen et al., 2009; Wu et al., 2012