We evaluated the performance of the Cobas TaqMan MTB test (Roche Diagnostics, Basel, Switzerland), stratified by acid-fast bacilli (AFB) smear grades. The sensitivity of this test in smear-positive specimens was >95% in all grades, while that in trace and negative specimens was 85.3% and 34.4%, respectively.
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http://dx.doi.org/10.1128/JCM.02630-14 | DOI Listing |
BMC Infect Dis
January 2025
University of California, San Francisco, San Francisco, CA, USA.
Background: Point-of-care HIV viral load testing may enhance patient care and improve HIV health services. We aimed to evaluate the feasibility and acceptability of implementing such testing in a high-volume community sexual health clinic in the United States.
Methods: We conducted a cross-sectional, mixed-methods study.
PLoS One
December 2024
Department of Anesthesiology, Qilu Hospital of Shandong University, Jinan, Shandong Province, China.
Objective: According to the YY/T 1182-2010 standard of the People's Republic of China on nucleic acid amplification test reagents (kits) for medical industry, the accuracy, precision, linear range, and analytic sensitivity of HIV-1 standardized quality control products should be assessed. The Geneway HIV-1 Nucleic Acid Detection Kit from China has been successfully registered with the National Medical Products Administration. Here, we aimed to assess for the first time its detection performance.
View Article and Find Full Text PDFMicroorganisms
November 2024
Cancer Research Center of Lyon, INSERM U1052, CNRS UMR 5286, 69008 Lyon, France.
The GeneXpert HBV Viral Load test is a simplified tool to scale up screening and HBV monitoring in resource-limited settings, where HBV is endemic and where molecular techniques to quantify HBV DNA are expensive and scarce. However, the accuracy of field diagnostics compared to gold standard assays in HBV-endemic African countries has not been well understood. We aim to validate the diagnostic performance of the GeneXpert HBV Viral Load test in freshly collected and stored plasma and dried blood spot (DBS) samples to assess turn-around-time (TAT) for sample processing and treatment initiation, to map GeneXpert machines and to determine limitations to its use in The Gambia.
View Article and Find Full Text PDFJ Clin Virol
December 2024
Department of Medicine, Division of Infectious Diseases and Geographic Medicine, Stanford University School of Medicine, Stanford, CA, USA.
Background: The WHO HIV testing algorithm for high prevalence populations recommends the use of three different serologic assays, though this approach may lead to diagnostic misclassification. The study objective was to compare dried blood spot (DBS)-based HIV-1 nucleic acid detection methods to determine their suitability to confirm the diagnosis of HIV-1 in adults generally with suppressed or low-level plasma HIV-1 RNA.
Methods: Four methods were evaluated: Cepheid Xpert HIV-1 Qual Assay (Xpert), Hologic Aptima HIV-1 Quant Dx assay (Aptima), Roche Cobas Ampliprep/Cobas TaqMan HIV-1 test, v.
AIDS Res Hum Retroviruses
January 2025
Infectious Diseases Division, Paulista School of Medicine, Federal University of São Paulo, São Paulo, Brazil.
HIV RNA plasma viral load (VL) is the standard surrogate marker to monitor response to antiretroviral treatment (ART). We compared the linearity, repeatability, and concordance of six commercially available HIV RNA VL platforms using clinical samples from patients from Brazilian sites where different HIV-1 subtypes co-circulate. A total of 150 plasma samples from each city were collected in Curitiba, Southern Brazil (subtype C), São Paulo (subtype B), and Santos (BF recombinants), Southeast Brazil.
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