Usefulness of a multiplex PCR for the rapid identification of Candida glabrata species complex in Mexican clinical isolates


Por: Reyes-Montes M.R., Acosta-Altamirano, Gustavo, Duarte-Escalante, Esperanza, Salazar E.G., Martinez-Herrera, Erick, Arenas, Roberto, Gonzalez, Gloria, Frías-De-León M.G.

Publicada: 1 ene 2019
Resumen:
Candida glabrata complex includes three species identified through molecular biology methods: C. glabrata sensu stricto, C. nivariensis and C. bracarensis. In Mexico, the phenotypic methods are still used in the diagnosis; therefore, the presence of C. nivariensis and C. bracarensis among clinical isolates is still unknown. The aim of this study was to evaluate the utility of a multiplex PCR for the identification of the C. glabrata species complex. DNA samples from 92 clinical isolates that were previously identified through phenotypic characteristics as C glabrata were amplified by four oligonucleotides (UNI-5.8S, GLA-f, BRA-f, and NIV-f) that generate amplicons of 397, 293 and 223-bp corresponding to C. glabrata sensu stricto, C. nivariensis. and C. bracarensis, respectively. The amplicon sequences were used to perform a phylogenetic analysis through the Maximum Likelihood method (MEGA6), including strains and reference sequences of species belonging to C. glabrata complex. In addition, recombination and linkage disequilibrium were estimated (DnaSP version 5.0) for C. glabrata sensu stricto isolates. Eighty-eight isolates generated a 397-bp fragment and only in one isolate a 223-bp amplicon was observed. In the phylogenetic tree, the sequences of 397-bp were grouped with C. glabrata reference sequences, and the sequence of 223-bp was grouped with C. bracarensis reference sequences, corroborating the PCR identification. The number of recombination events for the isolates of C. glabrata sensu stricto was zero, suggesting a clonal population structure. Three isolates that did not amplify any of the expected fragments were identified as Saccharomyces cerevisiae through the sequencing of the D1/D2 domain region within the 28S rDNA gene. The multiplex PCR is a fast, cost-effective and reliable tool that can be used in clinical laboratories to identify C. glabrata complex species.

Filiaciones:
Reyes-Montes M.R.:
 Universidad Nacional Autónoma de México, Facultad de Medicina, Departamento de Microbiología y Parasitología, Ciudad de México, Mexico

Acosta-Altamirano, Gustavo:
 Hospital Regional de Alta Especialidad de Ixtapaluca, Unidad de Investigación, Ixtapaluca, Mexico

 Hosp Reg Alta Especialidad Ixtapaluca, Ixtapaluca, Mexico

Duarte-Escalante, Esperanza:
 Universidad Nacional Autónoma de México, Facultad de Medicina, Departamento de Microbiología y Parasitología, Ciudad de México, Mexico

 Univ Nacl Autonoma Mexico, Dept Microbiol & Parasitol, Ciudad De Mexico, Mexico

Salazar E.G.:
 Hospital Regional de Alta Especialidad de Ixtapaluca, Unidad de Investigación, Ixtapaluca, Mexico

Martinez-Herrera, Erick:
 Hospital Regional de Alta Especialidad de Ixtapaluca, Unidad de Investigación, Ixtapaluca, Mexico

 Hosp Reg Alta Especialidad Ixtapaluca, Ixtapaluca, Mexico

Arenas, Roberto:
 Hospital General “Dr. Manuel Gea González, Sección de Micología, Ciudad de México, Mexico

 Hosp Gen Dr Manuel Gea Gonzalez, Secc Micol, Ciudad De Mexico, Mexico

Gonzalez, Gloria:
 Universidad Autónoma de Nuevo León, Facultad de Medicina, Departamento de Microbiología, Monterrey, Mexico

 Univ Autonoma Nuevo Leon, Fac Med, Dept Microbiol, Monterrey, Mexico

Frías-De-León M.G.:
 Hospital Regional de Alta Especialidad de Ixtapaluca, Unidad de Investigación, Ixtapaluca, Mexico
ISSN: 00364665





Revista Do Instituto De Medicina Tropical De Sao Paulo
Editorial
INST MEDICINA TROPICAL SAO PAULO, AV DR ENEAS CARVALHO DE AGUIAR, 470, C CESAR, SAO PAULO, 05403-000, BRAZIL, Brasil
Tipo de documento: Article
Volumen: 61 Número:
Páginas:
WOS Id: 000480599400001
ID de PubMed: 31411267

MÉTRICAS