Single-tube protocol for culture-independent spoligotyping of Mycobacterium tuberculosis based on MeltArray.
J Clin Microbiol
; 62(1): e0118323, 2024 01 17.
Article
in En
| MEDLINE
| ID: mdl-38112521
ABSTRACT
IMPORTANCE Spacer oligonucleotide typing (spoligotyping), the first-line genotyping assay for Mycobacterium tuberculosis (MTB), plays a fundamental role in the investigation of its epidemiology and evolution. In this study, we established a single-tube spoligotyping assay using MeltArray, a highly multiplex polymerase chain reaction (PCR) approach that runs on a real-time PCR thermocycler. The MeltArray protocol included an internal positive control, gyrB, to indicate the abundance of MTB via the quantification cycle and 43 spacers to identify the spoligotype via melting curve analysis. The entire protocol was completed in a single step within 2.5 hours. The lowest detectable copy number for the tested strains was 20 copies/reaction and thus sufficient for analyzing both culture and sputum samples. We conclude that MeltArray-based spoligotyping could be used immediately in low- and middle-income countries with a high tuberculosis burden, given its easy access, improved throughput, and potential applicability to clinical samples.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Tuberculosis
/
Mycobacterium tuberculosis
Limits:
Humans
Language:
En
Journal:
J Clin Microbiol
Year:
2024
Document type:
Article
Country of publication:
Estados Unidos