Background: The prevalence of non-tuberculous mycobacteria (NTM) has been increasing worldwide in both developed and developing countries. NTM infection is clinically indistinguishable from tuberculosis and therefore poses significant challenges in patient management, especially in patients chronically treated for pulmonary TB. In this study, we evaluated a new highly sensitive Multiplex MTB/NTM assay that can differentiate M. tuberculosis complex (MTBC) from all NTM, including the treatable and most common NTM, M. avium complex (MAC).
Methods: We developed and optimized a new open- Multiplex MTB/NTM assay with two gene-targets for MTBC (IS6110/senX3-regX3) and two targets for MAC (IS1311/DT1) with samples spiked with stored strains and testing 20 replicates. Patients with presumptive TB and NTM were enrolled at the Respiratory Disease Department of The University Teaching Hospital of Point G, in Mali.
Findings: In the development stage, the new assay showed a high analytic performance with 100% detections of MTBC and MAC at only 5 colony forming units (CFUs). Overall, without the treatment failure cases, the Multiplex assay and the Xpert showed a sensitivity, specificity, PPV and NPV of 83·3% [66·4-92·6], 96·6% [88·6-99·0], 92·5% [82·3-96·5] and 92·2% [82·7-96·5] and the Xpert had values of 96·7% [83·3-99·4], 80·0% [68·2-88·1], 70·7 [55·5-82·3] and 97·9% [89·3-99·6], respectively. The Multiplex assay successfully detected all (5/5) the MAC cases.
Interpretation: Our new Multiplex assay demonstrates better specificity than Xpert for all group studied, in addition to detecting potential NTM cases. The assay could therefore complement the widely used Xpert assay and enhance discrimination of TB and NTM infections.
Funding: This work was supported by the National Institutes of Health (R03AI137674, U54EB027049, D43TW010350 and UM1AI069471) and Northwestern University's Institute for Global Health Catalyzer Fund.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8365364 | PMC |
| http://dx.doi.org/10.1016/j.ebiom.2021.103527 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Spatial Organization of Macrophages in CTL Rich Hepatocellular Carcinoma Influences CTL Antitumor Activity.
Cancer Immunol Res
January 2025
Sun Yat-sen University, Guangzhou, China.
Despite the pivotal role of cytotoxic T lymphocytes (CTLs) in anti-tumor immunity, a substantial proportion of CTL-rich hepatocellular carcinoma (HCC) patients experience early relapse or immunotherapy resistance. However, spatial immune variations impacting the heterogeneous clinical outcomes of CTL-rich HCCs remain poorly understood. Here, we compared the single-cell and spatial landscapes of 20 CTL-rich HCCs with distinct prognoses using multiplexed in situ staining and validated the prognostic value of myeloid spatial patterns in a cohort of 386 patients.
View Article and Find Full Text PDFMolecular epidemiology of carbapenem-resistant group in Taiwan.
mSphere
December 2024
Department of Microbiology and Immunology, School of Medicine, College of Medicine, China Medical University, Taichung, Taiwan.
particularly the group, is a major cause of nosocomial infections, and carbapenem-resistant spp. are important human pathogens. We collected 492 spp.
View Article and Find Full Text PDFSimultaneous Detection of Five Infectious Diseases in a Single Strip: Oligo dT-Utilized Lateral Flow Immunoassay.
Anal Chem
January 2025
SB BIOSCIENCE Inc., Room 120, Venture Building, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
The need for accurate and simultaneous diagnosis of multiple respiratory infectious diseases has become increasingly critical due to ongoing viral mutations and the similarity of symptoms among various viruses. Here, we have advanced our detection capabilities by developing a multiplex lateral flow immunoassay (LFA) platform that integrates oligonucleotides and antibodies, enabling the simultaneous detection of five respiratory viruses: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), Influenza A (FluA), Influenza B (FluB), Respiratory syncytial virus (RSV), and Adenovirus (ADV), on a single membrane. By applying the oligonucleotide and antibody-conjugated AuNPs, the platform enables highly sensitive and specific detection.
View Article and Find Full Text PDF[Rapid Diagnosis of Central Nervous System Infections by Multiplex PCR Assay and the Viral Etiology in Children].
Mikrobiyol Bul
October 2024
University of Health Sciences, Dr. Behçet Uz Pediatric Diseases and Surgery Training and Research Hospital, Clinic of Pediatric Infectious Diseases, İzmir, Türkiye.
Central nervous system infections (CNS) are life-threatening infections in children, requiring urgent intervention and rapid diagnosis. In this study, we aimed to investigate the efficacy of syndromic tests in diagnosing CNS infections and the distribution of viral pathogens in pediatric patients. A total of 145 pediatric patients with a prediagnosis of CNS infection based on clinical findings by a pediatric infectious disease specialist were included in the study.
View Article and Find Full Text PDF[Clinical Impact of Current Variants in COVID-19 Patients: Clinical Characteristics in Variant EG.5].
Mikrobiyol Bul
October 2024
University of Health Sciences, Ankara Bilkent City Health Application and Research Center, Clinic of Medical Microbiology, Ankara, Türkiye.
The severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) virus has mutated at a high rate since the beginning of the pandemic, leading to the formation of different variants. Alpha, Beta, Gamma, Delta and Omicron have emerged as concerning variants identified by the World Health Organization (WHO). The Omicron variant and its sublineages became dominant worldwide in 2022.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!