Karin Hatzold

Dados Biográficos

ID7749709
NOMEKarin Hatzold
PRENOMESKarin
SOBRENOMEHatzold
ASSINATURAHATZOLD K
AFILIAÇÕESPopulation Services International
ORCID0000-0002-5117-3732
VERIFICADOSim
TOTAL DE OBRAS28
TOTAL DE CITAÇÕES0
TOTAL COMO AUTOR28
TOTAL COMO EDITOR0
PRIMEIRO ANO DE PUBLICAÇÃO2013
ANO MAIS RECENTE DE PUBLICAÇÃO2026
ÍNDICE H0

  • Feasibility and acceptability of hepatitis C virus self-testing models among high-risk groups in Nasarawa, Nigeria; Exploratory cross-sectional analysis of an implementation study

    Open AccessVictor Abiola Adepoju, Chidinma Umebido et al.ARTICLEPLOS Global Public Health2026

    Hepatitis C virus (HCV) infection remains a major public health challenge, with significant gaps in diagnosis and treatment in resource-limited settings. Hepatitis C self-testing (HCVST) offers a potential strategy to expand access, particularly in HIV clinical settings. We evaluated feasibility and acceptability of HCVST among high-risk populations in Nasarawa State, Nigeria when provided at antiretroviral (ART) clinics and one-stop shops (OSS) …

  • Acceptability of Covid-19 self-testing among social and clinical vulnerable populations using a decentralized testing model in Abuja, Nigeria; A mixed methods analysis of an implementation study

    Open AccessElvis Isere, John Bimba et al.ARTICLEPLOS Global Public Health2026

    Diagnostic testing is critical during infectious disease outbreaks, enabling timely patient management and isolation to reduce transmission and mortality. During the COVID-19 outbreak in Nigeria, testing rates remained low due to limited access to centralized RT-PCR sites. To expand access, the National COVID-19 Testing Strategy (January 2021) introduced decentralized self-testing models targeting vulnerable populations. This study assessed the u…

  • Do community-level factors play a role in HIV self-testing uptake, linkage to services and HIV-related outcomes? A mixed methods study of community-led HIV self-testing in rural Zimbabwe

    Open AccessMary K Tumushime, Nancy Ruhode et al.ARTICLEPLOS Global Public Health2025

    Community-led interventions, where communities plan and lead implementation, are increasingly being adopted within public health programmes. We explore factors associated with successful community-led distribution of HIV self-test (HIVST) kits to guide future service delivery. Twenty rural communities were supported to distribute HIVST kits for 1-month between January and September 2019. Social science researchers observed communities during plan…

  • Assessing hepatitis C self-testing within differentiated care models in Cameroon

    Open AccessHedgar Plessy Mboussam, Stéphane Brice Seukam Kouenkap et al.ARTICLEPLOS Global Public Health2025

    Hepatitis C virus (HCV) infection remains a global public health concern, with limited care coverage in resource-limited settings. HCV self-testing (HCVST) offers a potential strategy to expand screening, diagnosis, and treatment. This study evaluated the feasibility and acceptability of HCVST among at-risk populations in Cameroon. Between 26-06-2023 and 01-03-2024, adults (≥21 years) were recruited through four HCVST service models targeting spe…

  • Evaluating effectiveness and comparative costs of hepatitis C virus self-testing service delivery models in Vietnam

    Open AccessBao Vu Ngoc, T Minh et al.ARTICLEPLOS Global Public Health2025

    Hepatitis C virus self-testing (HCVST) has been shown to reach people who may not otherwise test. We conducted a cross-sectional survey to assess the effectiveness and costs of different HCVST distribution models among key populations (KPs) and people living with HIV (PLHIV) in Hanoi and Ho Chi Minh City, Vietnam, between September 2023 and April 2024. We engaged eight community-based organizations (CBOs) and 10 public and private clinics in offe…

  • Who has never tested for HIV following a community-based distribution of HIV self-test kits? Establishing associated predictors in rural Zimbabwe

    Open AccessWellington Murenjekwa, Kudzai Chidhanguro et al.ARTICLEPLOS Global Public Health2025

    In 2023, Zimbabwe attained the 95-95-95 UNAIDS targets. However, some sub-populations are substantially less likely to have tested for HIV. Knowledge of characteristics of these groups is crucial in designing interventions that address their needs. We estimated the prevalence and predictors of “never-having tested for HIV” status following community-based distribution of HIV self-test kits in rural Zimbabwe. We analysed data from a household surv…

  • Provider costs of professional Covid-19 rapid antigen testing in low-income settings

    Open AccessCollin Mangenah, Lucky G Ngwira et al.ARTICLEPLOS Global Public Health2025

    World Health Organization recommends antigen rapid diagnostic tests (RDT) as point of care tests for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in suspected outbreaks when polymerase-chain-reaction testing is not accessible; to trace the extent of outbreaks; and in areas with widespread community transmission. Annual economic costs were estimated for professional SARS-CoV-2 testing as part of several COVID-19 testing use cases i…

  • Understanding the acceptability of Covid-19 antigen rapid diagnostic tests

    Open AccessWezzie Lora, Wezzie S Lora et al.ARTICLEPLOS Global Public Health2025

    Accessible and timely diagnostic testing was essential during the COVID-19 pandemic to control the virus’s spread and mitigate severe outcomes. However, real-time polymerase chain reaction tests, although sensitive incur high costs and prolonged turnaround times, and face implementation challenges in many resource-constrained settings. Antigen rapid diagnostic tests (Ag-RDT), which can be administered either by providers or as self-tests, are acc…

  • Understanding mechanisms of impact from community-led delivery of HIV self-testing

    Open AccessPitchaya Indravudh, Fern Terris-Prestholt et al.ARTICLEPLOS Global Public Health2022

    Community HIV strategies are important for early diagnosis and treatment, with new self-care technologies expanding the types of services that can be led by communities. We evaluated mechanisms underlying the impact of community-led delivery of HIV self-testing (HIVST) using mediation analysis. We conducted a cluster-randomised trial allocating 30 group village heads and their catchment areas to the community-led HIVST intervention in addition to…

  • The cost and intermediary cost-effectiveness of oral HIV self-test kit distribution across 11 distribution models in South Africa

    Open AccessKatleho Matsimela, Linda Sande et al.ARTICLEBMJ Global Health2021

    BACKGROUND: Countries around the world seek innovative ways of closing their remaining gaps towards the target of 95% of people living with HIV (PLHIV) knowing their status by 2030. Offering kits allowing HIV self-testing (HIVST) in private might help close these gaps. METHODS: We analysed the cost, use and linkage to onward care of 11 HIVST kit distribution models alongside the Self-Testing AfRica Initiative's distribution of 2.2 million HIVST k…

  • Does community-based distribution of HIV self-tests increase uptake of HIV testing? Results of pair-matched cluster randomised trial in Zambia

    Open AccessMelissa Neuman, B Hensen et al.ARTICLEBMJ Global Health2021

    OBJECTIVES: Ending HIV by 2030 is a global priority. Achieving this requires alternative HIV testing strategies, such as HIV self-testing (HIVST) to reach all individuals with HIV testing services (HTS). We present the results of a trial evaluating the impact of community-based distribution of HIVST in community and facility settings on the uptake of HTS in rural and urban Zambia. DESIGN: Pair-matched cluster randomised trial. METHODS: In catchme…

  • Innovative demand creation strategies to increase voluntary medical male circumcision uptake

    Open AccessWebster Mavhu, Melissa Neuman et al.ARTICLEBMJ Global Health2021

    INTRODUCTION: Reaching men aged 20-35 years, the group at greatest risk of HIV, with voluntary medical male circumcision (VMMC) remains a challenge. We assessed the impact of two VMMC demand creation approaches targeting this age group in a randomised controlled trial (RCT). METHODS: We conducted a 2×2 factorial RCT comparing arms with and without two interventions: (1) standard demand creation augmented by human-centred design (HCD)-informed app…

  • ART initiations following community-based distribution of HIV self-tests

    Open AccessMelissa Neuman, Katherine Fielding et al.ARTICLEBMJ Global Health2021

    INTRODUCTION: Measuring linkage after community-based testing, particularly HIV self-testing (HIVST), is challenging. Here, we use data from studies of community-based HIVST distribution, conducted within the STAR Initiative, to assess initiation of antiretroviral therapy (ART) and factors driving differences in linkage rates. METHODS: Five STAR studies evaluated HIVST implementation in Malawi, Zambia and Zimbabwe. New ART initiations during the …

  • Community-based HIV self-testing

    Open AccessEuphemia Sibanda, Melissa Neuman et al.ARTICLEBMJ Global Health2021

    BACKGROUND: HIV self-testing (HIVST) requires linkage to post-test services to maximise its benefits. We evaluated effect of supply-side incentivisation on linkage following community-based HIVST and evaluated time-trends in facility-based antiretroviral therapy (ART) initiations. METHODS: From August 2016 to August 2017 community-based distributors (CBDs) in 38 rural Zimbabwean communities distributed HIVST door-to-door in 19-25 day campaigns. C…

  • Effect of peer-distributed HIV self-test kits on demand for biomedical HIV prevention in rural KwaZulu-Natal, South Africa

    Open AccessM Shahmanesh, Thobile Mthiyane et al.ARTICLEBMJ Global Health2021

    Study objective We investigated two peer distribution models of HIV self-testing (HIVST) in HIV prevention demand creation compared with trained young community members (peer navigators). Methods We used restricted randomisation to allocate 24 peer navigator pairs (clusters) in KwaZulu-Natal 1:1:1: (1) standard of care ( SOC): peer navigators distributed clinic referrals, pre-exposure prophylaxis (PrEP) and antiretroviral therapy (ART) informatio…

  • Effect of door-to-door distribution of HIV self-testing kits on HIV testing and antiretroviral therapy initiation

    Open AccessPitchaya Indravudh, Katherine Fielding et al.ARTICLEBMJ Global Health2021

    INTRODUCTION: Reaching high coverage of HIV testing remains essential for HIV diagnosis, treatment and prevention. We evaluated the effectiveness and safety of door-to-door distribution of HIV self-testing (HIVST) kits in rural Malawi. METHODS: This cluster randomised trial, conducted between September 2016 and January 2018, used restricted 1:1 randomisation to allocate 22 health facilities and their defined areas to door-to-door HIVST alongside …

  • Pragmatic economic evaluation of community-led delivery of HIV self-testing in Malawi

    Open AccessPitchaya Indravudh, Katherine Fielding et al.ARTICLEBMJ Global Health2021

    INTRODUCTION: Community-based strategies can extend coverage of HIV testing and diagnose HIV at earlier stages of infection but can be costly to implement. We evaluated the costs and effects of community-led delivery of HIV self-testing (HIVST) in Mangochi District, Malawi. METHODS: This economic evaluation was based within a pragmatic cluster-randomised trial of 30 group village heads and their catchment areas comparing the community-led HIVST i…

  • The cost effectiveness and optimal configuration of HIV self-test distribution in South Africa

    Open AccessLise Jamieson, Leigh F Johnson et al.ARTICLEBMJ Global Health2021

    BACKGROUND: HIV self-testing (HIVST) has been shown to be acceptable, feasible and effective in increasing HIV testing uptake. Novel testing strategies are critical to achieving the UNAIDS target of 95% HIV-positive diagnosis by 2025 in South Africa and globally. METHODS: We modelled the impact of six HIVST kit distribution modalities (community fixed-point, taxi ranks, workplace, partners of primary healthcare (PHC) antiretroviral therapy (ART) …

  • Comparison of community-led distribution of HIV self-tests kits with distribution by paid distributors

    Open AccessEuphemia Sibanda, Collin Mangenah et al.ARTICLEBMJ Global Health2021

    BACKGROUND: We compared community-led versus an established community-based HIV self-testing (HIVST) model in rural Zimbabwe using a cluster-randomised trial. METHODS: Forty village groups were randomised 1:1 using restricted randomisation to community-led HIVST, where communities planned and implemented HIVST distribution for 4 weeks, or paid distribution (PD), where distributors were paid US$50 to distribute kits door-to-door over 4 weeks. Indi…

  • Relative efficiency of demand creation strategies to increase voluntary medical male circumcision uptake

    Open AccessCollin Mangenah, Webster Mavhu et al.ARTICLEBMJ Global Health2021

    BACKGROUND: Supply and demand-side factors continue to undermine voluntary medical male circumcision (VMMC) uptake. We assessed relative economic costs of four VMMC demand creation/service-delivery modalities as part of a randomised controlled trial in Zimbabwe. METHODS: Interpersonal communication agents were trained and incentivised to generate VMMC demand across five districts using four demand creation modalities (standard demand creation (SD…

  • Costs of integrating HIV self-testing in public health facilities in Malawi, South Africa, Zambia and Zimbabwe

    Open AccessLinda Sande, Linda Alinafe Sande et al.ARTICLEBMJ Global Health2021

    INTRODUCTION: As countries approach the UNAIDS 95-95-95 targets, there is a need for innovative and cost-saving HIV testing approaches that can increase testing coverage in hard-to-reach populations. The HIV Self-Testing Africa-Initiative distributed HIV self-test (HIVST) kits using unincentivised HIV testing counsellors across 31 public facilities in Malawi, South Africa, Zambia and Zimbabwe. HIVST was distributed either through secondary (partn…

  • Modelling costs of community-based HIV self-testing programmes in Southern Africa at scale

    Open AccessMarc d’Elbée, Gabriela B Gomez et al.ARTICLEBMJ Global Health2021

    BACKGROUND: Following success demonstrated with the HIV Self-Testing AfRica Initiative, HIV self-testing (HIVST) is being added to national HIV testing strategies in Southern Africa. An analysis of the costs of scaling up HIVST is needed to inform national plans, but there is a dearth of evidence on methods for forecasting costs at scale from pilot projects. Econometric cost functions (ECFs) apply statistical inference to predict costs; however, …

  • Too old to test?’

    Open AccessCheryl Johnson, Moses Kumwenda et al.ARTICLEBMC Public Health2021

    Characteristics associated with age-gender norms and social position encourage self-testing but drive poor HIV-risk perception and unacceptability of conventional HIV testing in midlife-older adults. There is an urgent need to provide targeted messages and services more appropriate to midlife-older adults in sub-Saharan Africa. HIVST which has often been highlighted as a tool for reaching young people, may be a valuable tool for engaging midlife-…

  • Use and awareness of and willingness to self-test for HIV

    Open AccessCheryl Johnson, Melissa Neuman et al.ARTICLEBMC Public Health2020

    In 2015-16, many Malawian and Zimbabwean men had never tested for HIV. Despite low awareness and minimal HIVST experience, willingness to self-test was high among Zimbabwean men, especially older men with moderate-to-high HIV-related sexual risk. These data provide a valuable baseline against which to investigate population-level uptake of HIVST as programmes scale up. Programmes introducing, or planning to introduce, HIVST should consider includ…

  • Costs of accessing HIV testing services among rural Malawi communities

    Open AccessLinda Sande, Hendramoorthy Maheswaran et al.ARTICLEAIDS Care2018

    HIV testing is free in Malawi, but users may still incur costs that can deter or delay them accessing these services. We sought to identify and quantify these costs among HIV testing service clients in Malawi. We asked residents of communities participating in a cluster randomised trial investigating the impact of HIV self-testing about their past HIV testing experiences and the direct non-medical and indirect costs incurred to access HIV testing…