Drug-resistance testing in HIV patients: reduced viral load for no extra cost

2000 ◽  
Vol 284 (1) ◽  
pp. 7-7
Keyword(s):  
Drug Resistance ◽  
Viral Load ◽  
Extra Cost ◽  
Resistance Testing ◽  
Hiv Patients ◽  
Drug Resistance Testing

scholarly journals Evidence of virological failure in patients on second-line anti-retroviral therapy in Southwestern Nigeria: An indication for HIV drug resistance testing

2021 ◽  
Vol 22 (3) ◽  
pp. 415-419
Author(s):  
S.O. Usman ◽  
O.M. Ajayi ◽  
O. Ebiekura ◽  
N. Egbonrelu ◽  
G. Ebhojie ◽  
...  
Keyword(s):  
Drug Resistance ◽  
Viral Load ◽  
Virological Failure ◽  
Resistance Testing ◽  
Second Line ◽  
Southwestern Nigeria ◽  
Drug Resistance Testing ◽  
The Mean ◽  
Traitement Antirétroviral ◽  
Charge Virale

Background: In sub-Saharan Africa where genotypic anti-retroviral (ARV) drug resistance testing is rarely performed and poor adherence is blamed for the inability to achieve viral suppression and treatment failure, programmatic approaches to preventing and handling these are essential. This study was aimed at assessing the virological outcomes among HIV patients receiving second-line anti-retroviral therapy (ART) in Southwestern Nigeria.Methodology: This was a 5-year observational retrospective study of randomly selected people living with HIV (PLWHIV) who have been switched to second-line ART for at least six months before the commencement of the study in multiple comprehensive ART sites across the three levels of care, in Ondo and Ekiti States, Southwestern Nigeria, from January 2015 to December 2019. Quantitative viral load analysis was done using polymerase chain reaction (PCR) assay. Data were analyzed using the Statistical Package for Social Sciences (SPSS) version 24.0.Results: A total of 249 (71 males and 178 females) subjects eligible for the study were recruited using simple random sampling technique. The mean age (± SD) of the subjects was 44.21 ± 11.45 years. The mean number of years the patients have been on ART regimen was 7.92 ± 2.68 years. The mean number of years the patients were on first line ART regimen before being switched to second line was 4.27 ± 2.63 years. Patients with viral load <1000 RNA copies/ml (suppressed viral load) were 216 (86.7%) out of which 113 (45.4%) had viral load <20 RNA copies/ml while 33 (13.3%) had viral load >1000 RNA copies/ml (unsuppressed viral load or virological failure).Conclusion: About 13% of the patients on second line ART had unsuppressed viral load of more than 1000 RNA copies/ml indicating virological failure. Thus, critical factors such as poor adherence to ART and drug resistance chiefly contributing to virological failure have to be routinely checked. Keywords: suppression, ART, resistance, virological, failure, Nigeria   French title: Preuve d'échec virologique chez les patients sous traitement antirétroviral de deuxième intention dans le sud-ouest du Nigeria: une indication pour le test de résistance aux médicaments contre le VIH   Contexte: En Afrique subsaharienne, où les tests génotypiques de résistance aux antirétroviraux (ARV) sont rarement effectués et où une mauvaise observance est imputée à l'incapacité d'obtenir la suppression virale et l'échec du traitement, des approches programmatiques pour les prévenir et les gérer sont essentielles. Cette étude visait à évaluer les résultats virologiques chez les patients VIH recevant un traitement antirétroviral (TAR) de deuxième intention dans le sud-ouest du Nigeria. Méthodologie: Il s'agissait d'une étude rétrospective d'observation de 5 ans portant sur des personnes vivant avec le VIH (PVVIH) sélectionnées au hasard et passées à un TAR de deuxième intention pendant au moins six mois avant le début de l'étude dans plusieurs sites de TAR complets aux trois niveaux. de soins, dans les États d'Ondo et d'Ekiti, dans le sud-ouest du Nigéria, de janvier 2015 à décembre 2019. L'analyse quantitative de la charge virale a été effectuée à l'aide d'un test de réaction en chaîne par polymérase (PCR). Les données ont été analysées à l'aide du logiciel Paquet statistique pour les sciences sociales (SPSS) version 24.0. Résultats: Un total de 249 (71 hommes et 178 femmes) sujets éligibles à l'étude ont été recrutés à l'aide d'une technique  d'échantillonnage aléatoire simple. L'âge moyen (± ET) des sujets était de 44,21±11,45 ans. Le nombre moyen d'années pendant lesquelles les patients ont été sous traitement antirétroviral était de 7,92±2,68 ans. Le nombre moyen d'années pendant lesquelles les patients étaient sous traitement antirétroviral de première ligne avant de passer en deuxième ligne était de 4,27 ± 2,63 ans. Les patients avec une charge virale <1000 copies d'ARN/ml (charge virale supprimée) étaient 216 (86,7%) dont 113 (45,4%) avaient une charge virale <20 copies d'ARN/ml tandis que 33 (13,3%) avaient une charge virale >1000 ARN copies/ml (charge virale non supprimée ou échec virologique). Conclusion: Environ 13 % des patients sous TAR de deuxième ligne avaient une charge virale non supprimée de plus de 1000 copies d'ARN/ml indiquant un échec virologique. Ainsi, les facteurs critiques tels qu'une mauvaise adhésion au TARV et la résistance aux médicaments contribuant principalement à l'échec virologique doivent être systématiquement vérifiés. Mots clés: suppression, TAR, résistance, virologique, échec, Nigeria  

scholarly journals HIV-2 Drug Resistance Genotyping from Dried Blood Spots

2020 ◽  
Vol 59 (1) ◽  
pp. e02303-20
Author(s):  
Dana N. Raugi ◽  
Robert S. Nixon ◽  
Sally Leong ◽  
Khadim Faye ◽  
Jean Phillipe Diatta ◽  
...  
Keyword(s):  
Drug Resistance ◽  
Viral Load ◽  
Plasma Viral Load ◽  
Mononuclear Cells ◽  
Dried Blood Spots ◽  
Antiretroviral Drugs ◽  
Resistance Testing ◽  
Peripheral Blood Mononuclear ◽  
Blood Spots ◽  
Drug Resistance Testing

ABSTRACTThe treatment of HIV-2 in resource-limited settings (RLS) is complicated by the limited availability of HIV-2-active antiretroviral drugs and inadequate access to HIV-2 viral load and drug resistance testing. Dried blood spots (DBS)-based drug resistance testing, widely studied for HIV-1, has not been reported for HIV-2 and could present an opportunity to improve care for HIV-2-infected individuals. We selected 150 DBS specimens from ongoing studies of antiretroviral therapy (ART) for HIV-2 infection in Senegal and subjected them to genotypic drug resistance testing. Total nucleic acid was extracted from DBS, reverse transcribed, PCR amplified, and analyzed by population-based Sanger sequencing, and major drug resistance-associated mutations (RAM) were identified. Parallel samples from plasma and peripheral blood mononuclear cells (PBMC) were also genotyped. We obtained 58 protease/reverse transcriptase genotypes. Plasma viral load was significantly correlated with genotyping success (P < 0.001); DBS samples with corresponding plasma viral load >250 copies/ml had a success rate of 86.8%. In paired DBS-plasma genotypes, 83.8% of RAM found in plasma were also found in DBS, and replicate DBS genotyping revealed that a single test detected 86.7% of known RAM. These findings demonstrate that DBS-based genotypic drug resistance testing for HIV-2 is feasible and can be deployed in RLS with limited infrastructure.

scholarly journals Resource and infrastructure challenges on the RESIST-2 Trial: an implementation study of drug resistance genotype-based algorithmic ART switches in HIV-2-infected adults in Senegal

Trials ◽  
2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Dana N. Raugi ◽  
Khardiata Diallo ◽  
Mouhamadou Baïla Diallo ◽  
Dominique Faye ◽  
Ousseynou Cisse ◽  
...  
Keyword(s):  
Drug Resistance ◽  
Viral Load ◽  
Virologic Failure ◽  
Resistance Testing ◽  
Second Line ◽  
Implementation Challenges ◽  
Drug Resistance Testing ◽  
Inhibitor Resistance ◽  
Drug Resistance Genotype

Abstract Background Second-line treatment of HIV-2 in resource-limited settings (RLS) is complicated by a lack of controlled trial data, limited availability of HIV-2-active antiretroviral drugs, and inadequate access to drug resistance testing. We conducted an implementation trial of a dried blood spot- (DBS) based, drug resistance genotype-informed antiretroviral therapy (ART) switching algorithm for HIV-2-infected patients in Senegal. Methods HIV-2-infected adults initiating or receiving ART through the Senegalese national AIDS program were invited to participate in this single-arm trial. DBS from participants with virologic failure (defined as viral load (VL) > 250 copies/mL after > 6 months on the current ART regimen) were shipped to Seattle for genotypic drug resistance testing. Participants with evidence of drug resistance in protease or reverse transcriptase were switched to new regimens according to a pre-specified algorithm. Participant clinical and immuno-virologic outcomes were assessed, as were implementation challenges. Results We enrolled 152 participants. Ten were initiating ART. The remainder were ART-experienced, with 91.0% virologically suppressed (< 50 copies/mL). Problems with viral load testing capability resulted in obtaining VL results for only 227 of 613 (37.0%) participant-visits. Six of 115 participants (5.2%) with VL available after > 6 months on current ART regimen experienced virologic failure, with per-protocol genotypic testing attempted. One additional test was performed for a participant with a VL of 222 copies/mL. Genotypes from three participants showed no evidence of major drug resistance mutations, two showed nucleoside reverse transcriptase inhibitor (NRTI) resistance, one showed both NRTI and protease inhibitor resistance, and one test failed. No integrase inhibitor resistance was observed. Five of six successfully-tested participants switched to the correct regimen or received additional adherence counseling according to the algorithm; the sixth was lost to follow-up. Follow-up VL testing was available for two participants; both of these were virally suppressed (< 10 copies/mL). The trial was terminated early due to the COVID-19 pandemic (which prevented further VL and genotypic testing), planned rollout of dolutegravir-based 1st-line ART, and funding. Conclusions The RESIST-2 trial demonstrated that a DBS-based genotypic test can be used to help inform second-line ART decisions as part of a programmatic algorithm in RLS, albeit with significant implementation challenges. Trial registration ClinicalTrials.govNCT03394196. Registered on January 9, 2018.

scholarly journals HIV-1 drug resistance testing at low viral load may help to differentiate between ongoing replication and release from reservoirs

2012 ◽  
Vol 15 (6(Suppl 4)) ◽  
Author(s):  
M Obermeier ◽  
R Ehret ◽  
R Kaiser ◽  
T Berg
Keyword(s):  
Drug Resistance ◽  
Viral Load ◽  
Resistance Testing ◽  
Drug Resistance Testing ◽  
Hiv 1

scholarly journals HemaSpot, a Novel Blood Storage Device for HIV-1 Drug Resistance Testing

2015 ◽  
Vol 54 (1) ◽  
pp. 223-225 ◽  
Author(s):  
K. Brooks ◽  
A. DeLong ◽  
M. Balamane ◽  
L. Schreier ◽  
M. Orido ◽  
...  
Keyword(s):  
United States ◽  
Drug Resistance ◽  
Viral Load ◽  
Resistance Mutation ◽  
Resistance Testing ◽  
Storage Device ◽  
Blood Storage ◽  
Blood Samples ◽  
Drug Resistance Testing ◽  
Hiv 1

HemaSpot, a novel dried-blood storage filter device, was used for HIV-1polresistance testing in 30 fresh United States blood samples and 54 previously frozen Kenyan blood samples. Genotyping succeeded in 79% and 58% of samples, respectively, improved with shorter storage and higher viral load, and had good (86%) resistance mutation concordance to plasma.

HIV Drug Resistance Testing in a Resource Limited Setting with High Viral Diversity: The First Twenty Eight Months Experience

2017 ◽  
Vol 15 (4) ◽  
Author(s):  
Elodie Teclaire Ngo-Malabo ◽  
Paul Alain Ngoupo ◽  
Serge Alain Sadeuh-Mba ◽  
Emmanuel Akongnwi ◽  
Robert Banaï ◽  
...  
Keyword(s):  
Drug Resistance ◽  
Resource Limited Setting ◽  
Resistance Testing ◽  
Viral Diversity ◽  
Hiv Drug Resistance ◽  
Drug Resistance Testing ◽  
Resource Limited ◽  
Limited Setting

scholarly journals Antiretroviral Drug Resistance Testing in Adult HIV‐1 Infection: 2008 Recommendations of an International AIDS Society–USA Panel

2008 ◽  
Vol 47 (2) ◽  
pp. 266-285 ◽  
Author(s):  
Martin S. Hirsch ◽  
Huldrych F. Günthard ◽  
Jonathan M. Schapiro ◽  
Françoise Brun‐Vézinet ◽  
Bonaventura Clotet ◽  
...  
Keyword(s):  
Drug Resistance ◽  
Resistance Testing ◽  
International Aids ◽  
Antiretroviral Drug Resistance ◽  
Drug Resistance Testing ◽  
Antiretroviral Drug ◽  
Hiv 1

Clinically relevant thresholds for ultrasensitive HIV drug resistance testing: a multi-country nested case-control study

2018 ◽  
Vol 5 (11) ◽  
pp. e638-e646 ◽  
Author(s):  
Seth C Inzaule ◽  
Raph L Hamers ◽  
Marc Noguera-Julian ◽  
Maria Casadellà ◽  
Mariona Parera ◽  
...  
Keyword(s):  
Drug Resistance ◽  
Case Control Study ◽  
Case Control ◽  
Resistance Testing ◽  
Hiv Drug Resistance ◽  
Drug Resistance Testing ◽  
Nested Case Control ◽  
Control Study
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