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Stekler JD, Violette LR, Niemann LA, McMahan VM, Katz DA, Chavez PR, Clark HA, Cornelius-Hudson A, McDougal SJ, Delaney KP. Seroconversion, seroreversion, and serowaffling among participants initiating antiretroviral therapy in Project DETECT. Int J STD AIDS 2023; 34:385-394. [PMID: 36703607 DOI: 10.1177/09564624231152929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
BACKGROUND Incomplete HIV seroconversion and seroreversion are increasingly documented by testing and pre-exposure prophylaxis programs more than previously recognized. This analysis reports on incomplete seroconversion and seroreversion by specimen and test type among Project DETECT participants. METHODS Project DETECT included a longitudinal study of point-of-care tests. Participants were categorized as having "incomplete seroconversion" if all timepoints had ≥1 nonreactive test at study censoring. Among participants with incomplete seroconversion, we defined "seroreversion" as sustained regression to nonreactive for any test following a reactive result. We define "serowaffling" as any reactive result followed by a nonreactive and then reactive result. We used Fisher's exact tests to explore relationships between Fiebig stage at ART initiation and incomplete seroconversion, seroreversion, and serowaffling. RESULTS Twenty of 1940 Project DETECT participants met criteria for this subset. Ten participants had complete seroconversion after a median of 23 (IQR 16-47) days following initial positive tests. Ten participants had incomplete seroconversion, eight of whom had seroreversion. Incomplete seroconversion with persistent nonreactive tests was seen only with oral fluid (OF). Of eight participants with seroreversion, all experienced seroreversion of OF tests if the test was ever reactive (n = 6); seroreversion occurred in fingerstick and venipuncture tests in two participants. Serowaffling occurred in nine (45%) participants. No associations were seen between Fiebig stage at ART start and complete seroconversion, seroregression, or serowaffling in our sample. CONCLUSIONS OF tests may be particularly susceptible to providing false-negative results. Seroreversion and incomplete seroconversion among individuals on antiretroviral treatment may represent a growing problem for HIV testing and treatment programs.
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Affiliation(s)
- Joanne D Stekler
- Department of Medicine, 7284University of Washington, Seattle, WA, USA.,Department of Global Health, 7284University of Washington, Seattle, WA, USA.,Department of Epidemiology, 7284University of Washington, Seattle, WA, USA
| | - Lauren R Violette
- Department of Medicine, 7284University of Washington, Seattle, WA, USA.,Department of Epidemiology, 7284University of Washington, Seattle, WA, USA
| | - Lisa A Niemann
- Department of Medicine, 7284University of Washington, Seattle, WA, USA
| | - Vanessa M McMahan
- 7152San Francisco Department of Public Health, San Francisco, CA, USA
| | - David A Katz
- Department of Global Health, 7284University of Washington, Seattle, WA, USA.,Department of Epidemiology, 7284University of Washington, Seattle, WA, USA
| | - Pollyanna R Chavez
- Division of HIV Prevention, 1242Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Hollie A Clark
- Division of HIV Prevention, 1242Centers for Disease Control and Prevention, Atlanta, GA, USA
| | | | - Sarah J McDougal
- Department of Medicine, 7284University of Washington, Seattle, WA, USA
| | - Kevin P Delaney
- Division of HIV Prevention, 1242Centers for Disease Control and Prevention, Atlanta, GA, USA
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Violette LR, Cornelius-Hudson A, Snidarich M, Niemann LA, Assennato SM, Ritchie A, Goel N, Chavez PR, Ethridge SF, Katz DA, Lee H, Delaney KP, Stekler JD. Evaluation of SAMBA II: A Qualitative and Semiquantitative HIV Point-of-Care Nucleic Acid Test. J Acquir Immune Defic Syndr 2022; 89:537-545. [PMID: 34974473 PMCID: PMC9058199 DOI: 10.1097/qai.0000000000002902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 11/15/2021] [Indexed: 11/26/2022]
Abstract
BACKGROUND Point-of-care (POC) nucleic acid tests (NATs) have potential to diagnose acute HIV infection and monitor persons taking pre-exposure prophylaxis or antiretroviral therapy (ART). POC NATs have not yet been evaluated in the US. METHODS From June 2018-March 2019, we conducted a cross-sectional evaluation of the Simple Amplification-Based Assay version II (SAMBA II) POC NAT. People with HIV (PWH) and persons testing for HIV were tested with the SAMBA II qualitative (Qual) whole blood (WB) test. From April-September 2019, the Qual test was used on persons who were ART-naive, and SAMBA II Semi-quantitative (Semi-Q) WB was used with ART-experienced PWH. Both were performed on unprocessed venipuncture (VP) and, when indicated by protocol, fingerstick (FS) WB and plasma. SAMBA results were compared with Abbott RealTime HIV-1 polymerase chain reaction results on plasma. We calculated sensitivity, specificity, and concordance between tests. RESULTS SAMBA was used in 330 visits among 280 participants: 202 (61.2%) visits from PWH, and 128 (38.8%) from HIV-negative persons. Qual test sensitivity with ART-naive participants was 91.4% [32/35, 95% confidence interval (CI): 77.6% to 97.0%] using VP WB and 100% (27/27, 95% CI: 87.5% to 100%) using FS WB. Specificity was 100% using both specimen types. Concordance between the gold standard and Semi-Q at 1000 copies/mL among PWH on ART was 97.7% (86/88, 95% CI: 92.1% to 99.4%) and 100% (30/30, 95% CI: 88.7% to 100%) using VP and FS WB, respectively. CONCLUSIONS The SAMBA II POC NATs showed high sensitivity, specificity, and concordance with the gold standard assay, indicating its potential use in diagnostics and monitoring. Future work will evaluate POC NAT implementation in the US.
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Affiliation(s)
- Lauren R Violette
- Department of Medicine, University of Washington, Seattle, WA, US
- Department of Epidemiology, University of Washington, Seattle, WA, US
| | | | | | - Lisa A Niemann
- Department of Medicine, University of Washington, Seattle, WA, US
| | | | | | - Neha Goel
- Diagnostics for the Real World Ltd, Cambridge, UK
| | - Pollyanna R Chavez
- Division of HIV/AIDS Prevention, Centers for Disease Control and Prevention, Atlanta, GA, US
| | - Steven F Ethridge
- Division of HIV/AIDS Prevention, Centers for Disease Control and Prevention, Atlanta, GA, US
| | - David A. Katz
- Department of Global Health, University of Washington, Seattle, WA, US
| | - Helen Lee
- Diagnostics for the Real World Ltd, Cambridge, UK
| | - Kevin P Delaney
- Division of HIV/AIDS Prevention, Centers for Disease Control and Prevention, Atlanta, GA, US
| | - Joanne D Stekler
- Department of Medicine, University of Washington, Seattle, WA, US
- Department of Epidemiology, University of Washington, Seattle, WA, US
- Department of Global Health, University of Washington, Seattle, WA, US
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