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We assess the performances of the Alinity M STI assay (Abbott Molecular) in comparison to the Xpert CT/NG assay (Cepheid). We first retrospectively used a collection of 70 frozen samples of which 33, 31, and 6 were positives for Chlamydia trachomatis (CT), Neisseria gonorrhoea (NG), and both micro-organisms respectively. The Alinity M STI and the Xpert CT/NG results were in accordance for all. The mean difference in cycle threshold values between the Xpert CT/NG and the Alinity M STI were -1.6 and 0.0 for CT and NG respectively. Then 214 fresh samples collected from 121 patients were prospectively tested with both instruments. Anal swabs, throat swabs, vaginal swabs, and urines accounted each for about 25%. Seven (3.2%) samples of which 5 anal swabs, provided inconclusive results with the Alinity M STI. In conclusion, the Alinity M STI is an accurate device for the microbiological diagnosis of NG and CT infections.
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http://dx.doi.org/10.1016/j.diagmicrobio.2024.116179 | DOI Listing |
Cureus
June 2025
Department of Microbiology, Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, Brussels, BEL.
Background: The Alinity m STI assay (Abbott Molecular, Des Plaines, IL, USA) is designed for the qualitative detection of (CT), (NG), (MG), and (TV) in individual collected samples. Pooled specimens are not recommended due to the high risk of inhibition.
Methods: We performed a two-part study, including a preliminary validation on 13 well-known positive samples before and after pooling, as well as a retrospective analysis of 5324 pooled specimens collected between 2021 and 2024.
Am J Clin Pathol
March 2025
Department of Veterans Affairs, National Pathology and Laboratory Medicine Program, Washington, DC, US.
Sex Transm Dis
November 2024
Department of Population and Public Health Sciences, Keck School of Medicine, University of Southern California, Los Angeles, CA.
Background: Mycoplasma genitalium causes a sexually transmitted infection and is also emerging as an important antimicrobial resistant pathogen. Data on M. genitalium infections among men who have sex with men (MSM) in low-resource settings are sparse.
View Article and Find Full Text PDFSex Transm Dis
July 2024
From the Tampa General Hospital, Tampa, FL.
Background: Chlamydia trachomatis (CT) and Neisseria gonorrhoeae (NG) are routinely tested and reported; however, Trichomonas vaginalis (TV) is the most common sexually transmitted infection (STI) in the United States and the prevalence of Mycoplasma genitalium (MG) infections is likely higher than estimated. We examined the clinical performance of the Alinity m STI assay for detection and surveillance of CT/NG/TV/MG in urine specimens from patients at a large academic medical center.
Methods: Urine specimen from 198 patients was tested in this evaluation.