Modified gold nanoparticle colorimetric probe-based biosensor for direct and rapid detection of Mycobacterium tuberculosis in sputum specimens.

Autor: Kooti S; Student Research Committee, Department of Microbiology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran., Kadivarian S; Department of Microbiology, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran., Abiri R; Fertility and Infertility Research Center, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran., Mohajeri P; Department of Microbiology, School of Medicine, Infectious Diseases Research Center, Research Institute for Health, Kermanshah University of Medical Sciences, Kermanshah, Iran., Atashi S; West Tuberculosis Center, Kermanshah University of Medical Sciences, Kermanshah, Iran., Ahmadpor H; Department of Medical Biotechnology, Qazvin University of Medical Sciences, Qazvin, Iran., Alvandi A; Medical Technology Research Center, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran. ah_alvandi@kums.ac.ir.; Department of Microbiology, School of Medicine, Medical Technology Research Center, Research Institute for Health Technology, Kermanshah University of Medical Sciences, 6714415333, Kermanshah, Iran. ah_alvandi@kums.ac.ir.
Jazyk: angličtina
Zdroj: World journal of microbiology & biotechnology [World J Microbiol Biotechnol] 2023 Mar 15; Vol. 39 (5), pp. 118. Date of Electronic Publication: 2023 Mar 15.
DOI: 10.1007/s11274-023-03564-w
Abstrakt: The incidence of Mycobacterium tuberculosis (MTB) is increasing due to lack of appropriate diagnostic and therapeutic methods. Therefore, early and accurate detection of this bacteria plays a significant role in controlling tuberculosis. This study aimed to design, develop, and implement a direct and rapid detection method of MTB using modified gold nanoparticle (AuNP) colorimetric probe-based biosensor in sputum specimens. Spherical AuNPs were synthesized by the citrate reduction method and were functionalized using thiol-modified oligonucleotides (AuNP-biosensor). AuNP-biosensor and IS6110 PCR were compared to the gold standard in terms of analytical and clinical sensitivity and specificity, positive predictive value (PPV), negative predictive value (NPV), diagnostic odds ratio (DOR), and accuracy in 52 clinical specimens. Gold standard was defined as a positive result in concentrated sputum smear microscopy (SSM), culture, or Xpert MTB/RIF.The AuNP-biosensor had 100% sensitivity and specificity for detection of total sputum DNA in less than 15 min with ready-to-use AuNP-biosensor. PPV, NPV, DOR and accuracy of this method were 100%, 100%, 2325 and 100%, respectively. Considering the promising results of the diagnostic value indices of the AuNP-biosensor, the designed method is an affordable, rapid, reliable, and cost-beneficial way for direct detection of MTB in sputum specimens.
(© 2023. The Author(s), under exclusive licence to Springer Nature B.V.)
Databáze: MEDLINE
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