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Moschese D, Lazzarin S, Colombo ML, Caruso F, Giacomelli A, Antinori S, Gori A. Breakthrough Acute HIV Infections among Pre-Exposure Prophylaxis Users with High Adherence: A Narrative Review. Viruses 2024; 16:951. [PMID: 38932243 PMCID: PMC11209220 DOI: 10.3390/v16060951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 06/02/2024] [Accepted: 06/10/2024] [Indexed: 06/28/2024] Open
Abstract
Pre-exposure prophylaxis (PrEP) is a pivotal intervention among HIV prevention strategies. We aimed to narratively revise the topic of HIV acute infection in the setting of PrEP exposure with a focus on diagnostic options, clinical features, and future PrEP perspectives, with a particular focus on users with high adherence to PrEP. We searched the main databases (PubMed, Embase, and Scopus) with the keywords "PrEP" or "Pre-Exposure Prophylaxis" and "HIV" or "PLWH" and "breakthrough" or "acute infection" or "primary infection". We included all randomized clinical trials and non-experimental studies (both case reports and observational studies) ever published. In the present narrative review, we revise the diagnostic challenges related to HIV diagnosis in the setting of PrEP and the clinical characteristics and symptoms of breakthrough infections. We discuss the management of acute HIV infection during PrEP and the new challenges that arise from the use of long-acting drugs for PrEP. Our review underlines that although extremely rare, HIV seroconversions are still possible during PrEP, even in a context of high adherence. Efforts to promptly identify these events must be included in the PrEP follow-up in order to minimize the chance of overlooked HIV breakthrough infections and thus exposure to suboptimal concentrations of antiretrovirals.
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Affiliation(s)
- Davide Moschese
- I Division of Infectious Diseases, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, 20157 Milan, Italy;
| | - Samuel Lazzarin
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20133 Milan, Italy; (S.L.); (M.L.C.); (F.C.); (A.G.); (S.A.)
- III Infectious Diseases Unit, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, 20157 Milan, Italy
| | - Martina Laura Colombo
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20133 Milan, Italy; (S.L.); (M.L.C.); (F.C.); (A.G.); (S.A.)
- III Infectious Diseases Unit, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, 20157 Milan, Italy
| | - Francesco Caruso
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20133 Milan, Italy; (S.L.); (M.L.C.); (F.C.); (A.G.); (S.A.)
- II Infectious Diseases Unit, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, 20157 Milan, Italy
| | - Andrea Giacomelli
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20133 Milan, Italy; (S.L.); (M.L.C.); (F.C.); (A.G.); (S.A.)
- III Infectious Diseases Unit, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, 20157 Milan, Italy
| | - Spinello Antinori
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20133 Milan, Italy; (S.L.); (M.L.C.); (F.C.); (A.G.); (S.A.)
- III Infectious Diseases Unit, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, 20157 Milan, Italy
| | - Andrea Gori
- I Division of Infectious Diseases, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, 20157 Milan, Italy;
- Department of Biomedical and Clinical Sciences, Università degli Studi di Milano, 20133 Milan, Italy; (S.L.); (M.L.C.); (F.C.); (A.G.); (S.A.)
- II Infectious Diseases Unit, ASST Fatebenefratelli Sacco, Luigi Sacco Hospital, 20157 Milan, Italy
- Centre for Multidisciplinary Research in Health Science (MACH), Università degli Studi di Milano, 20122 Milan, Italy
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Maddox V, Vallely P, Brailsford SR, Harvala H. Virological safety of the UK blood supply in the era of individual risk assessments and HIV PrEP. Transfus Med 2023; 33:372-378. [PMID: 37668150 DOI: 10.1111/tme.12993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 08/17/2023] [Accepted: 08/18/2023] [Indexed: 09/06/2023]
Abstract
A more individualised donor selection policy was implemented in the UK in 2021, which replaced the previous 3-month deferral for men who have sex with men (MSM). Other blood services have a variety of policies in place to ensure the virological safety of blood components, ranging from an indefinite ban on MSM, to a defined period of exclusion, or to an individualised risk assessment that is not based on gender or sexual orientation. Justification of these policies should be based on scientific evidence including assessment of lengths of virological window periods, infectious disease epidemiology within donor populations and donation screening assay sensitivities. Developments in molecular technology and assays which can detect both antibodies and antigens in the very early stages of infection have significantly reduced the risk in most developed countries. However, the increasing usage of pre-exposure prophylaxis (PrEP) to prevent acquisition of HIV infection after possible high-risk sexual contact within the UK blood donor population has been recently noted. It has brought with it new diagnostic challenges within blood screening, notably possible non-detection of HIV RNA and serological markers following PrEP use despite potential infectivity. The use of other testing strategies such as detection of HIV DNA and screening for non-declared PrEP usage should be investigated further.
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Affiliation(s)
| | - Pamela Vallely
- Division of Evolution, Infection and Genomics Science, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | | | - Heli Harvala
- Microbiology Services, NHS Blood and Transplant, London, UK
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Levy L, Peterson JM, Kudrick LD, Chohan B, Bosek E, Mukui I, Mugambi M, Masyuko S, Mugurungi O, Ndlovu N, Mahaka I, Dunbar M, Hettema A, Kuwengwa RAP, Matse S, Mullick S, Greener L, O'Connor C, Pillay D, Fawzy M, Mellors JW, Parikh UM. Casting a Wide Net: HIV Drug Resistance Monitoring in Pre-Exposure Prophylaxis Seroconverters in the Global Evaluation of Microbicide Sensitivity Project. GLOBAL HEALTH: SCIENCE AND PRACTICE 2022; 10:GHSP-D-21-00122. [PMID: 35487541 PMCID: PMC9053149 DOI: 10.9745/ghsp-d-21-00122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 03/08/2022] [Indexed: 11/24/2022]
Abstract
Global Evaluation of Microbicide Sensitivity projects in 4 countries demonstrated the feasibility of establishing an HIV drug resistance monitoring program for pre-exposure prophylaxis (PrEP). These projects will provide valuable information on seroconversions in the context of PrEP use and will serve to inform Ministries of Health and policy makers on the need for long-term surveillance approaches. Background: Evidence of HIV drug resistance (HIVDR) in individuals using oral pre-exposure prophylaxis (PrEP) who acquire HIV is limited to clinical trials and case studies. More data are needed to understand the risk of HIVDR with oral PrEP during PrEP rollout. Mechanisms to collect these data vary, and are dependent on cost, scale of PrEP distribution, and in-country infrastructure for the identification, collection, and testing of samples from PrEP seroconverters. Methods: The Global Evaluation of Microbicide Sensitivity (GEMS) project, in collaboration with country stakeholders, initiated HIVDR monitoring among new HIV seroconverters with prior PrEP use in Eswatini, Kenya, South Africa, and Zimbabwe. Standalone protocols were developed to assess HIVDR among a national sample of PrEP users. In addition, HIVDR testing was incorporated into existing demonstration projects for key populations. Lessons learned: Countries are supportive of conducting a time-limited evaluation of HIVDR during the early stages of PrEP rollout. As PrEP rollout expands, the need for long-term HIVDR monitoring with PrEP will need to be balanced with maintaining national HIV drug resistance surveillance for pretreatment and acquired drug resistance. Laboratory capacity is a common obstacle to setting up a monitoring system. Conclusions: Establishing HIV resistance monitoring within PrEP programs is feasible. Approaches to drug resistance monitoring may evolve as the PrEP programs mature and expand. The methods and implementation support offered by GEMS assisted countries in developing methods to monitor for drug resistance that best fit their PrEP program needs and resources.
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Affiliation(s)
| | | | | | - Bhavna Chohan
- University of Washington, Seattle, WA, USA
- Kenya Medical Research Institute, Nairobi, Kenya
| | - Everline Bosek
- University of Washington, Seattle, WA, USA
- Kenya Medical Research Institute, Nairobi, Kenya
| | - Irene Mukui
- Drugs for Neglected Diseases initiative, Nairobi, Kenya
| | - Mary Mugambi
- National AIDS & STI Control Program, Nairobi, Kenya
| | | | - Owen Mugurungi
- Ministry of Health and Child Care of Zimbabwe, Harare, Zimbabwe
| | | | | | | | | | | | - Sindy Matse
- Eswatini Ministry of Health, Mbabane, Eswatini
| | - Saiqa Mullick
- Wits Reproductive Health and HIV Institute, Faculty of Health Science, University of Witwatersrand, Johannesburg, South Africa
| | - Letitia Greener
- Population Services International, Johannesburg, South Africa
| | | | - Diantha Pillay
- International Partnership for Microbicides, Johannesburg, South Africa
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Meyerowitz EA, Bernardo RM, Collins-Ogle MD, Czeresnia JM, Matos CM, Mullis C, Root HB, Torres-Isasiga JA, Tsai H, Zingman BS. Navigating HIV Screening Recommendations for People on PrEP and the Need to Update Testing Algorithms. Open Forum Infect Dis 2022; 9:ofac191. [PMID: 35794936 PMCID: PMC9251658 DOI: 10.1093/ofid/ofac191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Accepted: 04/07/2022] [Indexed: 11/13/2022] Open
Abstract
Abstract
The incident HIV infections that rarely occur in individuals on pre-exposure prophylaxis (PrEP) for HIV prevention may be associated with atypical or delayed seroconversion and have highlighted key problems with the widely used fourth generation HIV screening tests that assess for HIV p24 antigen and HIV-1/-2 antibodies. Recently updated CDC guidelines for management of people on PrEP now recommend the addition of HIV-1 RNA testing to antigen/antibody screening every 3 months for individuals on oral and injectable PrEP. We believe that in the context of available evidence and limited laboratory capacity, this should be done routinely only for individuals on injectable cabotegravir, and that antigen/antibody testing (without routine RNA testing) remain the test of choice for individuals on tenofovir-based PrEP formulations. Development of alternative HIV screening strategies that combine antibody and clinic-based rapid viral load testing would make it feasible to role this out to all individuals on PrEP.
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Affiliation(s)
- Eric A. Meyerowitz
- The AIDS Center at Montefiore, Division of Infectious Diseases, Montefiore Medical Center, Bronx, NY, USA
| | - Raffaele M. Bernardo
- The AIDS Center at Montefiore, Division of Infectious Diseases, Montefiore Medical Center, Bronx, NY, USA
| | | | - Jonathan M. Czeresnia
- The AIDS Center at Montefiore, Division of Infectious Diseases, Montefiore Medical Center, Bronx, NY, USA
| | - Cariane Morales Matos
- The AIDS Center at Montefiore, Division of Infectious Diseases, Montefiore Medical Center, Bronx, NY, USA
| | - Caroline Mullis
- The AIDS Center at Montefiore, Division of Infectious Diseases, Montefiore Medical Center, Bronx, NY, USA
| | - Heather B. Root
- The AIDS Center at Montefiore, Division of Infectious Diseases, Montefiore Medical Center, Bronx, NY, USA
| | - Julián A. Torres-Isasiga
- The AIDS Center at Montefiore, Division of Infectious Diseases, Montefiore Medical Center, Bronx, NY, USA
| | - Helen Tsai
- The AIDS Center at Montefiore, Division of Infectious Diseases, Montefiore Medical Center, Bronx, NY, USA
| | - Barry S. Zingman
- The AIDS Center at Montefiore, Division of Infectious Diseases, Montefiore Medical Center, Bronx, NY, USA
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Ogola B, Matume ND, Mavhandu-Ramarumo LG, Tebit DM, Bessong PO. Drug Resistance Mutations in a Population Before Antiretroviral Therapy Initiation in Northern South Africa. AIDS Res Hum Retroviruses 2022; 38:248-256. [PMID: 34107774 DOI: 10.1089/aid.2021.0026] [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: 11/13/2022] Open
Abstract
South Africa introduced the "diagnose and treat" universal HIV treatment program in September 2016. This program enables all identified HIV-positive patients to immediately start first-line antiretroviral therapy (ART). However, the presence of drug-resistant (DR) viruses in the drug-naive population complicates the choice of ART. We used next-generation sequencing (NGS) to determine the prevalence and diversity of HIV DR mutations in patients entering HIV treatment programs in northern South Africa. RNA was isolated from plasma of drug-naive HIV-1-infected patients. Using reverse transcriptase polymerase chain reaction, the HIV-1-pol gene comprising the complete protease (PR) and the first 900 bp of reverse transcriptase (RT) was amplified and sequenced on an Illumina MiniSeq platform. Consensus sequences were derived at >20% threshold and at >5% threshold using Geneious PRIME® software version 2020.1.2. HIV-1 surveillance drug resistance mutations (SDRM) were inferred using Calibrated Population Resistance tool in HIV Drug Resistance Database. Viral subtypes were determined using REGA and RIP genotyping tools. The HIV PR/RT region was successfully sequenced from 241 patients. From these, 23 (9.5%) had at least one SDRM detected at >20% threshold, with a prevalence of 9.5% (n = 18), 3% (n = 7), and 0.4% (n = 1) for non-nucleoside reverse transcriptase inhibitors (NNRTI), nucleoside reverse transcriptase inhibitors (NRTI), and protease inhibitors (PI), respectively. The number of patients with SDRM increased to 31 (12.9%) when minority variants were accounted for at >5% threshold. The most frequent SDRMs based on drug class were; K103N (7.9%-NNRTI), K65R (2.5%-NRTI), and D30N (0.8%-PI). Four cases of dual NRTI/NNRTI mutations were identified. All consensus sequences were subtype C, except three, which were C/A1, C/F1, and C/G recombinants. NGS analysis confirms that individuals entering HIV treatment programs in northern South Africa, habor moderate levels of SDRM, including cases of dual-class drug resistance. Further SDRM studies may be required to better understand resistance in the drug-naive population in the era of "diagnose and treat" in Limpopo Province, South Africa.
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Affiliation(s)
- Bixa Ogola
- HIV/AIDS & Global Health Research Program, University of Venda, Thohoyandou, South Africa
| | - Nontokozo D. Matume
- HIV/AIDS & Global Health Research Program, University of Venda, Thohoyandou, South Africa
| | | | - Denis M. Tebit
- HIV/AIDS & Global Health Research Program, University of Venda, Thohoyandou, South Africa
- Global Biomed Scientific LLC, PO Box 2368, Forest, VA 24551, USA
| | - Pascal O. Bessong
- HIV/AIDS & Global Health Research Program, University of Venda, Thohoyandou, South Africa
- Center for Global Health Equity, School of Medicine, University of Virginia, Charlottesville, Virginia, USA
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Kwan TH, Lui GCY, Lam TTN, Lee KCK, Wong NS, Chan DPC, Lee SS. Comparison between daily and on-demand PrEP (pre-exposure prophylaxis) regimen in covering condomless anal intercourse for men who have sex with men in Hong Kong: A randomized, controlled, open-label, crossover trial. J Int AIDS Soc 2021; 24:e25795. [PMID: 34473402 PMCID: PMC8412015 DOI: 10.1002/jia2.25795] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Accepted: 07/30/2021] [Indexed: 11/12/2022] Open
Abstract
Introduction Both daily and on‐demand regimens have been proven effective for pre‐exposure prophylaxis (PrEP) against HIV in men who have sex with men (MSM). We aimed to compare the two regimens on their coverage of condomless anal intercourse (CLAI) in MSM. Methods A randomized, controlled, open‐label, crossover trial was conducted in a teaching hospital in Hong Kong. Participants were sexually active HIV‐negative MSM aged 18 years or above with normal renal function and without chronic hepatitis B infection. Oral tenofovir disoproxil fumarate 300 mg/emtricitabine 200 mg (TDF/FTC) tablets were prescribed for PrEP. After a 2‐week lead‐in with daily TDF/FTC for treatment‐naïve MSM for tolerance assessment, participants were randomly assigned in a 1:1 ratio with a block size of four to either daily‐first or on‐demand‐first arm based on the IPERGAY study, for receiving PrEP for 16 weeks, then crossed‐over to the alternative regimen for another 16 weeks. The primary outcome was the proportion of days with PrEP‐covered CLAI by intention‐to‐treat analysis. The trial is registered with the CCRB Clinical Trials Registry, CUHK, CUHK_CCRB00606, and is closed to accrual. Results Between 25 August 2018 and 23 March 2019, 119 eligible participants were assigned to daily‐first arm (n = 59) and on‐demand‐first arm (n = 60) with an 87% overall completion rate (n = 103). With 96% and 54% of days on PrEP during daily and on‐demand periods, respectively, the proportion of days with PrEP‐covered CLAI between two arms were not statistically different (92% vs. 92%, p = 0.93). About half (47%) were diagnosed with at least one episode of incident sexually transmitted infection. Mild and time‐limited adverse events, including diarrhoea, headache, nausea and dizziness, were reported in 37 (31%) and 10 (8%) during the daily and on‐demand periods, respectively. At the end of the study, a similar proportion favoured daily or on‐demand regimen. Conclusions High prevention‐effective adherence, as reflected from the coverage of CLAI, was achievable by either daily or on‐demand PrEP among MSM, albeit a higher number of tablets taken for daily PrEP. As both regimens were well accepted, a flexible approach adopting either or both regimens with possible switching is warranted in order to suit individual health needs.
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Affiliation(s)
- Tsz Ho Kwan
- Stanley Ho Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Grace Chung Yan Lui
- Stanley Ho Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Shatin, Hong Kong.,Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Teddy Tai Ning Lam
- School of Pharmacy, The Chinese University of Hong Kong, Shatin, Hong Kong
| | | | - Ngai Sze Wong
- Stanley Ho Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Denise Pui Chung Chan
- Stanley Ho Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Shui Shan Lee
- Stanley Ho Centre for Emerging Infectious Diseases, The Chinese University of Hong Kong, Shatin, Hong Kong
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Ambrosioni J, Petit E, Liegeon G, Laguno M, Miró JM. Primary HIV-1 infection in users of pre-exposure prophylaxis. Lancet HIV 2020; 8:e166-e174. [PMID: 33316212 DOI: 10.1016/s2352-3018(20)30271-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 08/23/2020] [Accepted: 09/11/2020] [Indexed: 12/14/2022]
Abstract
Pre-exposure prophylaxis (PrEP) has proven to be a highly effective and safe way to prevent HIV infection. Seroconversion and primary HIV infection are exceptional if adherence to PrEP is good. However, primary HIV infection while using PrEP can occur, albeit rarely, and HIV drug resistance might develop. Furthermore, the scope of PrEP is expected to expand, and clinicians might face potential seroconversions and primary HIV infection in patients starting or taking PrEP. The characteristics of primary HIV infection in users of PrEP are poorly described. PrEP users present a lower viral load peak during primary HIV infection and, frequently, fewer symptoms than individuals not exposed to PrEP. Additionally, PrEP prolongs the stages of seroconversion, thus potentially complicating diagnosis of primary HIV infection. Drug resistance is rare, occurring mostly when PrEP is initiated in undiagnosed patients who are at an extremely early stage of infection, in whom detection of HIV-RNA was not used to rule out HIV infection. Therefore, careful exclusion of primary HIV infection before starting PrEP is crucial. In patients presenting with primary HIV infection while on PrEP, a drug with a high genetic barrier (or even two) should be added to tenofovir disoproxil fumarate-emtricitabine until test results for resistance are available.
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Affiliation(s)
- Juan Ambrosioni
- HIV Unit and Infectious Diseases Service, Hospital Clinic-IDIBAPS, Barcelona, Spain.
| | - Elisa Petit
- School of Medicine, University of Barcelona, Barcelona, Spain
| | - Geoffroy Liegeon
- Infectious Disease Department, Saint-Louis Hospital, Paris, France
| | - Montserrat Laguno
- HIV Unit and Infectious Diseases Service, Hospital Clinic-IDIBAPS, Barcelona, Spain; PrEP and Sexual Health Program, Hospital Clinic-IDIBAPS, Barcelona, Spain
| | - José M Miró
- School of Medicine, University of Barcelona, Barcelona, Spain
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Seed CR, Styles CE, Hoad VC, Yang H, Thomas MJ, Gosbell IB. Effect of HIV pre-exposure prophylaxis (PrEP) on detection of early infection and its impact on the appropriate post-PrEP deferral period. Vox Sang 2020; 116:379-387. [PMID: 32965051 DOI: 10.1111/vox.13011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 06/11/2020] [Accepted: 09/03/2020] [Indexed: 01/30/2023]
Abstract
INTRODUCTION HIV antivirals for pre-exposure prophylaxis (PrEP) are known to affect detection of early HIV infection through suppression of viral load and delayed seroconversion. To cover potential delay in HIV detection associated with PrEP use by blood donors in the context of international reductions in sexual activity-based deferral periods, we analysed the available data to determine the appropriate minimum post-PrEP deferral period for blood donation. MATERIALS AND METHODS Published cases of incident HIV infection when PrEP use was objectively demonstrable were identified, consisting principally of seroconverters from the Partners PrEP study (a clinical trial of PrEP efficacy). Data were reviewed to determine the impact of PrEP on the detection of HIV RNA, p24 Ag and seroconversion delay. RESULTS Nucleic acid testing (NAT) detected early HIV infection in the presence of PrEP prior to or in concordance with serological testing in approximately 90% of cases. Undetectable HIV RNA would rebound to detectable levels within two months of PrEP cessation. PrEP delayed p24 antigen detection and antibody seroconversion by about 7 days. CONCLUSION Even when daily PrEP is continued, it is likely that the majority of early HIV infections are detectable by individual donation (ID)-NAT, with p24 Ag or antibody seroconversion occurring conservatively within four weeks of exposure. HIV RNA levels also rebound rapidly in the absence of PrEP. In Australia, a three-month deferral period for blood donation after the last dose of PrEP provides an appropriate safety margin to mitigate the residual risk of transfusion-transmitted HIV.
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Affiliation(s)
- Clive R Seed
- Australian Red Cross Lifeblood, Perth, Australia
| | | | | | - Hung Yang
- Australian Red Cross Lifeblood, Sydney, Australia
| | - Michael J Thomas
- Australian Red Cross Lifeblood, Brisbane, Australia.,University of Queensland, Brisbane, Australia
| | - Iain B Gosbell
- Australian Red Cross Lifeblood, Sydney, Australia.,School of Medicine, Western Sydney University, Penrith, Australia
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