TB-QUICK: CRISPR-Cas12b-assisted rapid and sensitive detection of Mycobacterium tuberculosis
•TB-QUICK combines LAMP amplification and CRISPR-Cas12b reaction for M. tuberculosis detection.•TB-QUICK detection is isothermal, ultra-sensitive and rapid.•TB-QUICK exhibits 86.8% sensitivity and 95.2% specificity in pulmonary TB specimens.•TB-QUICK is of great advantages for smear-negative TB pati...
Gespeichert in:
Veröffentlicht in: | The Journal of infection 2021-07, Vol.83 (1), p.54-60 |
---|---|
Hauptverfasser: | , , , , , , , , , , , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | •TB-QUICK combines LAMP amplification and CRISPR-Cas12b reaction for M. tuberculosis detection.•TB-QUICK detection is isothermal, ultra-sensitive and rapid.•TB-QUICK exhibits 86.8% sensitivity and 95.2% specificity in pulmonary TB specimens.•TB-QUICK is of great advantages for smear-negative TB patients.
Tuberculosis (TB) remains one of the public health problems worldwide. Rapid, sensitive and cost-effective diagnosis of Mycobacterium tuberculosis (M.tb) is critical for TB control.
We developed a novel M.tb DNA detection platform (nominated as TB-QUICK) which combined loop-mediated isothermal amplification (LAMP) and CRISPR-Cas12b detection. TB-QUICK was performed on pulmonary or plasma samples collected from 138 pulmonary TB (PTB) patients, 21 non-TB patients and 61 close contacts to TB patients. Acid-fast bacillus (AFB) smear, M.tb culture and GeneXpert MTB/RIF (Xpert) assays were routinely conducted in parallel.
By targeting M.tb IS6110, TB-QUICK platform could detect as low as 1.3 copy/μL M.tb DNA within 2 h. In pulmonary TB samples, TB-QUICK exhibited improved overall sensitivity of 86.8% over M.tb culture (66.7%) and Xpert (70.4%), with the specificity of 95.2%. More significantly, TB-QUICK exhibited a superior sensitivity in AFB-negative samples (80.5%) compared to Xpert (57.1%) and M.tb culture (46.2%). In the detection of plasma M.tb DNA by TB-QUICK, 41.2% sensitivity for AFB-positive and 31.7% for AFB-negative patients were achieved.
In conclusion, TB-QUICK exhibits rapidity and sensitivity for M.tb DNA detection with the superiority in smear-negative paucibacillary TB patients. The clinical application of TB-QUICK in TB diagnosis needs to be further validated in larger cohort.
[Display omitted] |
---|---|
ISSN: | 0163-4453 1532-2742 |
DOI: | 10.1016/j.jinf.2021.04.032 |