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The Asanté™ HIV-1 Rapid Recency® Assay is reliable, feasible, and acceptable for use at the point-of-care in Lusaka, Zambia

Shilpa, Iyer1; Pry, Jake21; Bolton, Carolyn1; Savory, Theodora1; Herce, Michael31

Published Apr 22, 2026 on Dryad. https://doi.org/10.5061/dryad.k98sf7mnf

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Abstract

Zambia established a recent infection testing algorithm (RITA) incorporating a novel point-of-care (POC) rapid test—the Asanté™ HIV-1 Rapid Recency® Assay (RTRI)—plus a viral load (VL) test to distinguish recent (≤12 months) from long-term (>12 months) HIV acquisition. This study evaluated the field performance of RTRI when implemented by healthcare workers at POC. We enrolled individuals newly diagnosed with HIV between 20 May 2021 and 10 March 2022 at the two Ministry of Health facilities in Lusaka, Zambia. Participants received on-site RTRI testing and provided an additional sample for repeat RTRI and VL testing at a central laboratory. Final recent infection testing algorithm (RITA) results were returned to the study sites and were made available to clients upon follow-up visit. Agreement between POC and laboratory-RTRI was assessed using Cohen’s Kappa. We compared recent versus long-term HIV classification across testing locations using the national RITA as a reference. Four focus group discussions (FGDs) with health staff explored perceptions of POC-RTRI implementation. Agreement between POC and laboratory RTRI was 96.5%, with a Kappa of 0.812 (95% CI: 0.704–0.920). The POC-RTRI results indicated more recent infections than laboratory-RTRI (30 vs 27), with three POC-RTRI false positives resulting in reduced sensitivity 85.0% compared to 100.0% sensitivity against RITA. FGD participants (n=28) agreed that POC RTRI is feasible and acceptable with adequate training, human resources, client counselling, and quality assurance measures. There was strong concordance between POC- and laboratory-RTRI results. The findings support the feasibility of implementing RTRI at POC by non-laboratory health workers, provided adequate training and system resources are in place.