12 results on '"Nolwenn Conan"'
Search Results
2. Correction: What gaps remain in the HIV cascade of care? Results of a population-based survey in Nsanje District, Malawi.
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Nolwenn Conan, Cyrus P Paye, Reinaldo Ortuno, Alexander Chijuwa, Brown Chiwandira, Eric Goemaere, Daniela Belen Garone, Rebecca M Coulborn, Menard Chihana, and David Maman
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Medicine ,Science - Abstract
[This corrects the article DOI: 10.1371/journal.pone.0248410.].
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- 2024
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3. Correction: Increase in HIV viral suppression in KwaZulu-Natal, South Africa: Community-based cross sectional surveys 2018 and 2013. What remains to be done?
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Nolwenn Conan, Erica Simons, Menard L Chihana, Liesbet Ohler, Ellie FordKamara, Mduduzi Mbatha, Gilles vanCutsem, and Helena Huerga
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Medicine ,Science - Abstract
[This corrects the article DOI: 10.1371/journal.pone.0265488.].
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- 2024
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4. HIV, sexual violence, and termination of pregnancy among adolescent and adult female sex workers in Malawi: A respondent-driven sampling study.
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Claire Bossard, Menard Chihana, Sarala Nicholas, Damian Mauambeta, Dina Weinstein, Nolwenn Conan, Elena Nicco, Joel Suzi, Lucy OConnell, Elisabeth Poulet, and Tom Ellman
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Medicine ,Science - Abstract
Female Sex Workers (FSWs) are a hard-to-reach and understudied population, especially those who begin selling sex at a young age. In one of the most economically disadvantaged regions in Malawi, a large population of women is engaged in sex work surrounding predominantly male work sites and transport routes. A cross-sectional study in February and April 2019 in Nsanje district used respondent driven sampling (RDS) to recruit women ≥13 years who had sexual intercourse (with someone other than their main partner) in exchange for money or goods in the last 30 days. A standardized questionnaire was filled in; HIV, syphilis, gonorrhea, and chlamydia tests were performed. CD4 count and viral load (VL) testing occurred for persons living with HIV (PLHIV). Among 363 study participants, one-quarter were adolescents 13-19 years (25.9%; n = 85). HIV prevalence was 52.6% [47.3-57.6] and increased with age: from 14.7% (13-19 years) to 87.9% (≥35 years). HIV status awareness was 95.2% [91.3-97.4], ART coverage was 98.8% [95.3-99.7], and VL suppression 83.2% [77.1-88.0], though adolescent FSWs were less likely to be virally suppressed than adults (62.8% vs. 84.4%). Overall syphilis prevalence was 29.7% [25.3-43.5], gonorrhea 9.5% [6.9-12.9], and chlamydia 12.5% [9.3-16.6]. 72.4% had at least one unwanted pregnancy, 17.9% had at least one abortion (40.1% of which were unsafe). Half of participants reported experiencing sexual violence (SV) (47.6% [42.5-52.7]) and more than one-tenth (14.2%) of all respondents experienced SV perpetrated by a police officer. Our findings show high levels of PLHIV-FSWs engaged in all stages of the HIV cascade of care. The prevalence of HIV, other STIs, unwanted pregnancy, unsafe abortion, and sexual violence remains extremely high. Peer-led approaches contributed to levels of ART coverage and HIV status awareness similar to those found in the general district population, despite the challenges and risks faced by FSWs.
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- 2022
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5. Increase in HIV viral suppression in KwaZulu-Natal, South Africa: Community-based cross sectional surveys 2018 and 2013. What remains to be done?
- Author
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Nolwenn Conan, Erica Simons, Menard L Chihana, Liesbet Ohler, Ellie FordKamara, Mduduzi Mbatha, Gilles vanCutsem, and Helena Huerga
- Subjects
Medicine ,Science - Abstract
IntroductionHigh coverage of antiretroviral therapy (ART) in people living with HIV (PLHIV) increases viral suppression at population level and may reduce incidence. Médecins sans Frontières, in collaboration with the South African Department of Health, has been working in Eshowe/Mbongolwane (KwaZulu Natal) since 2011 to increase access to quality HIV services. Five years after an initial survey, we conducted a second survey to measure progress in HIV diagnosis and viral suppression and to identify remaining gaps.MethodsA cross-sectional, population-based, stratified two-stage cluster survey was implemented in 2018, using the same design as in 2013. Consenting participants aged 15-59 years were interviewed and tested for HIV at home. Those HIV-positive were tested for HIV viral load (viral suppression defined as ResultsOverall, 3,278 individuals were included. The proportion of HIV-positive participants virally suppressed was 83.8% in 2018 compared to 57.1% in 2013 (pConclusionsViral suppression improved significantly from 2013 to 2018, in all age and gender groups of PLHIV. However, almost half of HIV-positive young men remained unsuppressed, while the majority of virally unsuppressed PLHIV were women and older adults. To continue lowering HIV transmission, specific strategies are needed to increase viral suppression in those groups.
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- 2022
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6. What gaps remain in the HIV cascade of care? Results of a population-based survey in Nsanje District, Malawi.
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Nolwenn Conan, Cyrus P Paye, Reinaldo Ortuno, Alexander Chijuwa, Brown Chiwandira, Eric Goemaere, Daniela Belen Garone, Rebecca M Coulborn, Menard Chihana, and David Maman
- Subjects
Medicine ,Science - Abstract
IntroductionThe Malawi Ministry of Health (MoH) has been in collaboration with Médecins sans Frontières (MSF) to increase access to quality HIV care through decentralization of antiretroviral therapy (ART) diagnosis and treatment from hospital to clinics in Nsanje District since 2011. A population-based household survey was implemented to provide information on HIV prevalence and cascade of care to inform and prioritize community-based HIV interventions in the district.MethodsA cross-sectional survey was conducted between September 2016 and January 2017. Using two-stage cluster sampling, eligible adult individuals aged ≥15 years living in the selected households were asked to participate. Participants were interviewed and tested for HIV at home. Those tested HIV-positive had their HIV-RNA viral load (VL) measured, regardless of their ART status. All participants tested HIV-positive at the time of the survey were advised to report their HIV test result to the health facility of their choice that MSF was supported in the district. HIV-RNA VL results were made available in this health facility.ResultsAmong 5,315 eligible individuals, 91.1% were included in the survey and accepted an HIV test. The overall prevalence was 12.1% (95% Confidence Interval (CI): 11.2-13.0) and was higher in women than in men: 14.0% versus 9.5%, PConclusionsDespite encouraging results in HIV testing coverage, cascade of care, and UNAIDS targets in Nsanje District, some gap remains in the first 90, specifically among men and young adults. Enhanced community engagement and new strategies of testing, such as index testing, could be implemented to identify those who are still undiagnosed, particularly men and young adults.
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- 2021
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7. Evidence of HIV Incidence Reduction in Young Women, But Not in Adolescent Girls, Despite High HIV Population Viral Suppression, in Kwazulu-Natal, South Africa
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Laurette Mhlanga, Alex Welte, Eduard Grebe, Liesbet Ohler, Gilles Van CUTSEM, Helena Huerga, and Nolwenn Conan
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- 2023
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8. Two‐fold increase in the HIV viral load suppression rate along with decreased incidence over six years in Ndhiwa sub‐county, Kenya
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Robin Nesbitt, Menard Chihana, Helena Huerga, Elisabeth Szumilin, Leonard Kingwara, Nolwenn Conan, Valarie Opollo, Catherine Ngugi, Leon Salumu, Stephen Wanjala, Christopher Mambula, Gordon Okomo, and Mahmoud Badawi
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Adult ,Male ,Adolescent ,Anti-HIV Agents ,HIV diagnosis ,Population ,HIV Infections ,Virus ,Young Adult ,Prevalence ,Cluster Analysis ,Humans ,Medicine ,Hiv transmission ,education ,High rate ,education.field_of_study ,business.industry ,Incidence ,Incidence (epidemiology) ,Public Health, Environmental and Occupational Health ,Hiv incidence ,Middle Aged ,Viral Load ,Kenya ,Cross-Sectional Studies ,Infectious Diseases ,HIV-1 ,Female ,Parasitology ,business ,Viral load ,Demography - Abstract
BACKGROUND HIV-positive individuals who maintain an undetectable viral load cannot transmit the virus to others. In 2012, an HIV population-based survey was conducted in Ndhiwa sub-county (Kenya) to provide information on the HIV local epidemic. We carried out a second survey 6 years after the first one, to assess progress in HIV diagnosis and care and differences in the HIV prevalence and incidence between the two surveys. METHODS A cross-sectional, population-based survey using cluster sampling and geospatial random selection was implemented in 2018, using the same design as 2012. Consenting participants aged 15-59 years were interviewed and tested for HIV at home. HIV-positive individuals received viral load testing (viral suppression defined as
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- 2021
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9. Increase in HIV viral suppression in KwaZulu-Natal, South Africa: Community-based cross sectional surveys 2018 and 2013. What remains to be done?
- Author
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Nolwenn Conan, Erica Simons, Menard L. Chihana, Liesbet Ohler, Ellie FordKamara, Mduduzi Mbatha, Gilles vanCutsem, and Helena Huerga
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HIV Testing ,Male ,South Africa ,Multidisciplinary ,Cross-Sectional Studies ,Anti-HIV Agents ,Humans ,Female ,HIV Infections ,Viral Load ,Aged - Abstract
Introduction High coverage of antiretroviral therapy (ART) in people living with HIV (PLHIV) increases viral suppression at population level and may reduce incidence. Médecins sans Frontières, in collaboration with the South African Department of Health, has been working in Eshowe/Mbongolwane (KwaZulu Natal) since 2011 to increase access to quality HIV services. Five years after an initial survey, we conducted a second survey to measure progress in HIV diagnosis and viral suppression and to identify remaining gaps. Methods A cross-sectional, population-based, stratified two-stage cluster survey was implemented in 2018, using the same design as in 2013. Consenting participants aged 15–59 years were interviewed and tested for HIV at home. Those HIV-positive were tested for HIV viral load (viral suppression defined as Results Overall, 3,278 individuals were included. The proportion of HIV-positive participants virally suppressed was 83.8% in 2018 compared to 57.1% in 2013 (p Conclusions Viral suppression improved significantly from 2013 to 2018, in all age and gender groups of PLHIV. However, almost half of HIV-positive young men remained unsuppressed, while the majority of virally unsuppressed PLHIV were women and older adults. To continue lowering HIV transmission, specific strategies are needed to increase viral suppression in those groups.
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- 2021
10. What gaps remain in the HIV cascade of care? Results of a population-based survey in Nsanje District, Malawi
- Author
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Alexander Chijuwa, Eric Goemaere, Cyrus P. Paye, Nolwenn Conan, Brown Chiwandira, Reinaldo Ortuno, David Maman, Menard Chihana, Daniela Garone, and Rebecca M. Coulborn
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0301 basic medicine ,Male ,RNA viruses ,Malawi ,Epidemiology ,Psychological intervention ,HIV Infections ,Pathology and Laboratory Medicine ,HIV Testing ,Geographical Locations ,0302 clinical medicine ,Health facility ,Immunodeficiency Viruses ,Antiretroviral Therapy, Highly Active ,Prevalence ,Medicine and Health Sciences ,Medicine ,Public and Occupational Health ,030212 general & internal medicine ,Young adult ,Virus Testing ,education.field_of_study ,Multidisciplinary ,Community engagement ,HIV diagnosis and management ,Middle Aged ,Viral Load ,Vaccination and Immunization ,Medical Microbiology ,HIV epidemiology ,Viral Pathogens ,Viruses ,Cluster sampling ,Female ,Pathogens ,Viral load ,Research Article ,Adult ,Adolescent ,Anti-HIV Agents ,Science ,Population ,Immunology ,Antiretroviral Therapy ,Microbiology ,03 medical and health sciences ,Young Adult ,Antiviral Therapy ,Diagnostic Medicine ,Virology ,Retroviruses ,Humans ,education ,Microbial Pathogens ,Aged ,business.industry ,Lentivirus ,Organisms ,Biology and Life Sciences ,HIV ,030112 virology ,Confidence interval ,Cross-Sectional Studies ,Age Groups ,People and Places ,Africa ,Population Groupings ,Preventive Medicine ,business ,Viral Transmission and Infection ,Demography - Abstract
Introduction The Malawi Ministry of Health (MoH) has been in collaboration with Médecins sans Frontières (MSF) to increase access to quality HIV care through decentralization of antiretroviral therapy (ART) diagnosis and treatment from hospital to clinics in Nsanje District since 2011. A population-based household survey was implemented to provide information on HIV prevalence and cascade of care to inform and prioritize community-based HIV interventions in the district. Methods A cross-sectional survey was conducted between September 2016 and January 2017. Using two-stage cluster sampling, eligible adult individuals aged ≥15 years living in the selected households were asked to participate. Participants were interviewed and tested for HIV at home. Those tested HIV-positive had their HIV-RNA viral load (VL) measured, regardless of their ART status. All participants tested HIV-positive at the time of the survey were advised to report their HIV test result to the health facility of their choice that MSF was supported in the district. HIV-RNA VL results were made available in this health facility. Results Among 5,315 eligible individuals, 91.1% were included in the survey and accepted an HIV test. The overall prevalence was 12.1% (95% Confidence Interval (CI): 11.2–13.0) and was higher in women than in men: 14.0% versus 9.5%, P Conclusions Despite encouraging results in HIV testing coverage, cascade of care, and UNAIDS targets in Nsanje District, some gap remains in the first 90, specifically among men and young adults. Enhanced community engagement and new strategies of testing, such as index testing, could be implemented to identify those who are still undiagnosed, particularly men and young adults.
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- 2021
11. Successes and gaps in the HIV cascade of care of a high HIV prevalence setting in Zimbabwe: a population-based survey
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Tsitsi Apollo, Nolwenn Conan, Rebecca M. Coulborn, Esther C. Casas, Menard L. Chihana, David Maman, Abraham Mapfumo, Erica Simons, Daniela Garone, and Adrian Puren
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Adult ,Male ,Rural Population ,Zimbabwe ,viral suppression ,Adolescent ,Anti-HIV Agents ,prevalence ,Human immunodeficiency virus (HIV) ,Context (language use) ,HIV Infections ,medicine.disease_cause ,03 medical and health sciences ,Young Adult ,0302 clinical medicine ,Health care ,cascade of care ,medicine ,Humans ,030212 general & internal medicine ,Population based survey ,Research Articles ,Aged ,030505 public health ,business.industry ,Incidence (epidemiology) ,Public Health, Environmental and Occupational Health ,HIV ,Middle Aged ,Viral Load ,Hiv prevalence ,Confidence interval ,Infectious Diseases ,Cross-Sectional Studies ,HIV-1 ,incidence ,Female ,0305 other medical science ,business ,Viral load ,ART ,Demography ,Research Article - Abstract
Introduction Gutu, a rural district in Zimbabwe, has been implementing comprehensive HIV care with the support of Médecins Sans Frontières (MSF) since 2011, decentralizing testing and treatment services to all rural healthcare facilities. We evaluated HIV prevalence, incidence and the cascade of care, in Gutu District five years after MSF began its activities. Methods A cross‐sectional study was implemented between September and December 2016. Using multistage cluster sampling, individuals aged ≥15 years living in the selected households were eligible. Individuals who agreed to participate were interviewed and tested for HIV at home. All participants who tested HIV‐positive had their HIV‐RNA viral load (VL) measured, regardless of their antiretroviral therapy (ART) status, and those not on ART with HIV‐RNA VL ≥ 1000 copies/mL had Limiting‐Antigen‐Avidity EIA Assay for cross‐sectional estimation of population‐level HIV incidence. Results Among 5439 eligible adults ≥15 years old, 89.0% of adults were included in the study and accepted an HIV test. The overall prevalence was 13.6% (95%: Confidence Interval (CI): 12.6 to 14.5). Overall HIV‐positive status awareness was 87.4% (95% CI: 84.7 to 89.8), linkage to care 85.5% (95% CI: 82.5 to 88.0) and participants in care 83.8% (95% CI: 80.7 to 86.4). ART coverage among HIV‐positive participants was 83.0% (95% CI: 80.0 to 85.7). Overall, 71.6% (95% CI 68.0 to 75.0) of HIV‐infected participants had a HIV‐RNA VL
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- 2020
12. The challenges of introducing routine G6PD testing into radical cure: a workshop report
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Ric N. Price, April G. Dion-Berboso, Nick Luter, Yoel Lubell, Benedikt Ley, Lorenz von Seidlein, Angela Devine, Ritu Kumar, Wasif A. Khan, Kamala Thriemer, Lek Dysoley, J. Kevin Baird, Nolwenn Conan, Michael Kalnoky, Eugenie Poirot, Gonzalo J. Domingo, Fe Espino, Jimee Hwang, Germana Bancone, and Chong Chee Kheong
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Male ,medicine.medical_specialty ,Pathology ,Primaquine ,Point-of-Care Systems ,Point-of-care testing ,Binomial test ,Meeting Report ,Glucosephosphate Dehydrogenase ,Antimalarials ,hemic and lymphatic diseases ,parasitic diseases ,Malaria, Vivax ,Humans ,Medicine ,Medical physics ,Point of care test ,Rapid diagnostic test ,business.industry ,Cost-effectiveness analysis ,medicine.disease ,Malaria ,Test (assessment) ,Glucosephosphate Dehydrogenase Deficiency ,Infectious Diseases ,Economic evaluation ,Female ,Parasitology ,Plasmodium vivax ,business ,G6PD ,medicine.drug - Abstract
The only currently available drug that effectively removes malaria hypnozoites from the human host is primaquine. The use of 8-aminoquinolines is hampered by haemolytic side effects in glucose-6-phosphate dehydrogenase (G6PD) deficient individuals. Recently a number of qualitative and a quantitative rapid diagnostic test (RDT) format have been developed that provide an alternative to the current standard G6PD activity assays. The WHO has recently recommended routine testing of G6PD status prior to primaquine radical cure whenever possible. A workshop was held in the Philippines in early 2015 to discuss key challenges and knowledge gaps that hinder the introduction of routine G6PD testing. Two point-of-care (PoC) test formats for the measurement of G6PD activity are currently available: qualitative tests comparable to malaria RDT as well as biosensors that provide a quantitative reading. Qualitative G6PD PoC tests provide a binomial test result, are easy to use and some products are comparable in price to the widely used fluorescent spot test. Qualitative test results can accurately classify hemizygous males, heterozygous females, but may misclassify females with intermediate G6PD activity. Biosensors provide a more complex quantitative readout and are better suited to identify heterozygous females. While associated with higher costs per sample tested biosensors have the potential for broader use in other scenarios where knowledge of G6PD activity is relevant as well. The introduction of routine G6PD testing is associated with additional costs on top of routine treatment that will vary by setting and will need to be assessed prior to test introduction. Reliable G6PD PoC tests have the potential to play an essential role in future malaria elimination programmes, however require an improved understanding on how to best integrate routine G6PD testing into different health settings. Electronic supplementary material The online version of this article (doi:10.1186/s12936-015-0896-8) contains supplementary material, which is available to authorized users.
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- 2015
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