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Ssuuna J, Yeh PT, Kigozi G, Nalugoda F, Nakigozi G, Kagaayi J, Galiwango RM, Rosen JG, Reynolds SJ, Quinn TC, Wawer MJ, Gray RH, Grabowski MK, Chang LW. Household transport ownership and HIV viral suppression in rural Uganda: a cross- sectional, population-based study. RESEARCH SQUARE 2024:rs.3.rs-4288433. [PMID: 38746257 PMCID: PMC11092855 DOI: 10.21203/rs.3.rs-4288433/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
Background Empirical data on transportation access and HIV treatment outcomes in sub-Saharan Africa are rare. We assessed the association between household transport ownership and HIV viral suppression in rural Uganda. Methods The study was conducted among people living with HIV aged 15-49 years using cross-sectional data from the Rakai Community Cohort Study (RCCS), collected from June 14, 2018, to November 6, 2020. Transport ownership was defined as household possession of a car, motorcycle, or bicycle. HIV viral suppression was defined as < 1000 HIV RNA copies/ml. Poisson regression with robust variance estimation identified unadjusted and adjusted prevalence ratios and 95% confidence intervals (CI) of HIV viral suppression by transport ownership. Results The study included 3,060 persons aged 15-49 living with HIV. Overall HIV viral suppression was 86.5% and was higher among women compared to men (89.3% versus 81.6%; adjusted prevalence ratio: 1.14, 95% CI: 1.10, 1.18). A total of 874 participants (28.6%) resided in households that owned at least one means of transport. HIV viral suppression was 79.8% among men and 88.2% among women from households without any means of transport, compared to 85.4% among men and 92.4% among women from households with at least one means of transport. Adjusted prevalence ratios of HIV viral suppression were 1.11 (95% CI: 1.04, 1.18) for males and 1.06 (95% CI: 1.03, 1.10) for females from households owning at least one means of transport compared with those from households with none. Conclusion There was increased HIV viral suppression among people living with HIV from households with transport means compared to those from households without transport means, suggesting transport may facilitate access to, and continued engagement with, HIV treatment services.
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Astawesegn FH, Mannan H, Stulz V, Conroy E. Understanding the uptake and determinants of prevention of mother-to-child transmission of HIV services in East Africa: Mixed methods systematic review and meta-analysis. PLoS One 2024; 19:e0300606. [PMID: 38635647 PMCID: PMC11025786 DOI: 10.1371/journal.pone.0300606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 02/28/2024] [Indexed: 04/20/2024] Open
Abstract
BACKGROUND Prevention of mother-to-child transmission (PMTCT) of HIV service is conceptualized as a series of cascades that begins with all pregnant women and ends with the detection of a final HIV status in HIV-exposed infants (HEIs). A low rate of cascade completion by mothers' results in an increased risk of HIV transmission to their infants. Therefore, this review aimed to understand the uptake and determinants of key PMTCT services cascades in East Africa. METHODS We searched CINAHL, EMBASE, MEDLINE, Scopus, and AIM databases using a predetermined search strategy to identify studies published from January 2012 through to March 2022 on the uptake and determinants of PMTCT of HIV services. The quality of the included studies was assessed using the Mixed Methods Appraisal Tool. A random-effects model was used to obtain pooled estimates of (i) maternal HIV testing (ii) maternal ART initiation, (iii) infant ARV prophylaxis and (iv) early infant diagnosis (EID). Factors from quantitative studies were reviewed using a coding template based on the domains of the Andersen model (i.e., environmental, predisposing, enabling and need factors) and qualitative studies were reviewed using a thematic synthesis approach. RESULTS The searches yielded 2231 articles and we systematically reduced to 52 included studies. Forty quantitative, eight qualitative, and four mixed methods papers were located containing evidence on the uptake and determinants of PMTCT services. The pooled proportions of maternal HIV test and ART uptake in East Africa were 82.6% (95% CI: 75.6-88.0%) and 88.3% (95% CI: 78.5-93.9%). Similarly, the pooled estimates of infant ARV prophylaxis and EID uptake were 84.9% (95% CI: 80.7-88.3%) and 68.7% (95% CI: 57.6-78.0) respectively. Key factors identified were the place of residence, stigma, the age of women, the educational status of both parents, marital status, socioeconomic status, Knowledge about HIV/PMTCT, access to healthcare facilities, attitudes/perceived benefits towards PMTCT services, prior use of maternal and child health (MCH) services, and healthcare-related factors like resource scarcity and insufficient follow-up supervision. CONCLUSION Most of the identified factors were modifiable and should be considered when formulating policies and planning interventions. Hence, promoting women's education and economic empowerment, strengthening staff supervision, improving access to and integration with MCH services, and actively involving the community to reduce stigma are suggested. Engaging community health workers and expert mothers can also help to share the workload of healthcare providers because of the human resource shortage.
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Affiliation(s)
- Feleke Hailemichael Astawesegn
- Translational Health Research Institute (THRI), Western Sydney University, Campbelltown Campus, Penrith, New South Wales, Australia
- School of Public Health, College of Medicine and Health Sciences, Hawassa University, Hawassa, Ethiopia
- Rural Health Research Institute, Charles Sturt University, Orange, New South Wales, Australia
| | - Haider Mannan
- Translational Health Research Institute (THRI), Western Sydney University, Campbelltown Campus, Penrith, New South Wales, Australia
| | - Virginia Stulz
- School of Nursing and Midwifery Centre for Nursing and Midwifery Research, Western Sydney University, Kingswood, New South Wales, Australia
| | - Elizabeth Conroy
- Translational Health Research Institute (THRI), Western Sydney University, Campbelltown Campus, Penrith, New South Wales, Australia
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Fassinou LC, Ouoba J, Ngwasiri C, Romba I, Zoungrana-Yameogo WN, Bakiono F, Traoré IT, Hien H, Nagot N, Kirakoya-Samadoulougou F. Uptake of prevention of mother-to-child transmission cascade services in Burkina Faso between 2013 and 2020: are we on the right track? BMC Womens Health 2023; 23:126. [PMID: 36959578 PMCID: PMC10036241 DOI: 10.1186/s12905-023-02227-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 02/13/2023] [Indexed: 03/25/2023] Open
Abstract
BACKGROUND The use of services to prevent mother-to-child transmission (PMTCT) of the human immunodeficiency virus (HIV) remains a serious challenge in sub-Saharan Africa. In the last decade, Burkina Faso has implemented numerous policies to increase the use of PMTCT services by pregnant women and their partners, as well as children. This study assesses trends in the uptake of PMTCT services in Burkina Faso from 2013 to 2020 in order to study the progress and gaps in achieving the national and international targets set for 2020. METHODS A repeated cross-sectional analysis was performed using data extracted from district health information software version 2. Percentages were computed for each PMTCT indicator and comparisons between the years were made using a chi-square test for trends with a significance threshold of 5%. Regions were not compared with each other. RESULTS The proportion of pregnant women who were tested and received their results significantly increased from 47.9% in 2013 to 84.6% in 2020 (p value < 0.001). Of the 13 regions in the country, only 1 region met the 95% national targets whereas, 6 regions met the 90% international targets for this indicator. The proportions of HIV-positive women receiving antiretroviral therapy (ART) increased from 90.8% in 2013 to 100% in 2020. In the same period, the proportion of exposed infants who received antiretroviral prophylaxis increased from 64.3% in 2013 to 86.8% in 2020. Only 3 regions reached the national and international targets for this indicator. A positive trend was also observed for the indicator related to screening at 2 months or later of exposed infants using Polymerase Chain Reaction (PCR) technic; with the rate rising from 7.4% in 2013 to 75.7% in 2020. However, for this indicator, the national and international targets were not achieved considering the national and regional settings. Concerning the women's partners, the proportion of those who tested for HIV increased from 0.9% in 2013 to 4.5% in 2020, with only 1 region that fully met the national target of 10% in 2020. The prevalence of HIV in this particular group was 0.5% in 2020. CONCLUSIONS PMTCT indicators show an increase from 2013 to 2020 but with a strong disparity between regions. National and international targets have not been achieved for any indicator; except for those related to women receiving ART. Strengthening strategies to effectively engage women and their partners on the use of PMTCT cascade services could help reduce mother-to-child transmission in Burkina Faso.
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Affiliation(s)
- Lucresse Corine Fassinou
- Institut Supérieur des Sciences de la Santé, Université Nazi Boni, Bobo-Dioulasso, Burkina Faso.
| | - Joël Ouoba
- Institut Supérieur des Sciences de la Santé, Université Nazi Boni, Bobo-Dioulasso, Burkina Faso.
| | - Calypse Ngwasiri
- Centre for Research in Epidemiology, Biostatistics and Clinical Research of the School of Public Health, Université Libre de Bruxelles, Brussels, Belgique
| | - Issa Romba
- Secrétariat Permanent du Conseil National de lutte contre le Sida et les Infections Sexuellement Transmissibles, Ministère de la Santé, Burkina Faso
| | | | - Fidèle Bakiono
- Secrétariat Permanent du Conseil National de lutte contre le Sida et les Infections Sexuellement Transmissibles, Ministère de la Santé, Burkina Faso
| | - Isidore Tiandiogo Traoré
- Institut Supérieur des Sciences de la Santé, Université Nazi Boni, Bobo-Dioulasso, Burkina Faso
- Centre Muraz, Institut National de Santé Publique, Bobo-Dioulasso, Burkina Faso
| | - Hervé Hien
- Centre Muraz, Institut National de Santé Publique, Bobo-Dioulasso, Burkina Faso
| | - Nicolas Nagot
- Pathogenesis and Control of Chronic and Emerging Infections, University of Montpellier, INSERM, University Antilles, Etablissement Français du Sang, Montpellier, France
| | - Fati Kirakoya-Samadoulougou
- Centre for Research in Epidemiology, Biostatistics and Clinical Research of the School of Public Health, Université Libre de Bruxelles, Brussels, Belgique
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Budhwani H, Enah C, Bond CL, Halle-Ekane G, Wallace E, Turan JM, Szychowski JM, Long DM, Carlo WA, Tih PM, Tita ATN. mHealth Phone Intervention to Reduce Maternal Deaths and Morbidity in Cameroon: Protocol for Translational Adaptation. Int J Womens Health 2022; 14:677-686. [PMID: 35572348 PMCID: PMC9093609 DOI: 10.2147/ijwh.s353919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Accepted: 04/14/2022] [Indexed: 02/04/2023] Open
Abstract
Purpose The purpose of this NIH-funded protocol is to adapt (Aim 1) and pilot test (Aim 2) an mHealth intervention to improve maternal and child health in Cameroon. We will adapt the 24/7 University of Alabama at Birmingham Medical Information Service via Telephone (MIST) provider support system to mMIST (mobile MIST) for peripheral providers who provide healthcare to pregnant and postpartum women and newborns in Cameroon. Methods In Aim 1, we apply qualitative and participatory methods (in-depth interviews and focus groups with key stakeholders) to inform the adaptation of mMIST for use in Cameroon. We use the sequential phases of the ADAPT-ITT framework to iteratively adapt mMIST incorporating qualitative findings and tailoring for local contexts. In Aim 2, we test the adapted intervention for feasibility and acceptability in Ndop, Cameroon. Results This study is ongoing at the time that this protocol is published. Conclusion The adaptation, refinement, and pilot testing of mMIST will be used to inform a larger-scale stepped wedged cluster randomized controlled effectiveness trial. If successful, this mHealth intervention could be a powerful tool enabling providers in low-resource settings to deliver improved pregnancy care, thereby reducing maternal and fetal deaths.
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Affiliation(s)
- Henna Budhwani
- Department of Health Policy and Organization, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, USA,Center for Women’s Reproductive Health, University of Alabama at Birmingham, Birmingham, AL, USA,Correspondence: Henna Budhwani, Department of Health Policy and Organization, School of Public Health, University of Alabama at Birmingham, 330C Ryals Public Health Building, 1720 University Boulevard, Birmingham, AL, 35294, USA, Tel +1 205 975 7613, Fax +1 205 975 7685, Email
| | - Comfort Enah
- School of Nursing, College of Health Sciences, University of Massachusetts Lowell, Lowell, MA, USA
| | - Christyenne L Bond
- Department of Health Policy and Organization, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Gregory Halle-Ekane
- Department of Obstetrics and Gynaecology, University of Buea, Buea, Cameroon
| | - Eric Wallace
- Depatrment of Medicine, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Janet M Turan
- Department of Health Policy and Organization, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, USA,Center for Women’s Reproductive Health, University of Alabama at Birmingham, Birmingham, AL, USA,School of Medicine, Koç University, Istanbul, Turkey
| | - Jeff M Szychowski
- Department of Biostatistics, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Dustin M Long
- Department of Biostatistics, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Waldemar A Carlo
- Depatrment of Pediatrics, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Pius M Tih
- Cameroon Baptist Convention Health Services, Bamenda, North West Region, Cameroon
| | - Alan T N Tita
- Center for Women’s Reproductive Health, University of Alabama at Birmingham, Birmingham, AL, USA,Depatrment of Obstetrics and Gynecology, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
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Naburi HE, Mujinja P, Kilewo C, Biberfeld G, Bärnighausen T, Manji K, Lyatuu G, Urrio R, Zethraeus N, Orsini N, Ekström AM. Health care costs associated with clinic visits for prevention of mother-to-child transmission of HIV in Dar es Salaam, Tanzania. Medicine (Baltimore) 2021; 100:e27828. [PMID: 34797311 PMCID: PMC8601283 DOI: 10.1097/md.0000000000027828] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 10/28/2021] [Indexed: 01/05/2023] Open
Abstract
Early and appropriate antenatal care (ANC) is key for the effectiveness of prevention of mother-to-child transmission (PMTCT) of human immunodeficiency virus (HIV). We evaluated the importance of ANC visits and related service costs for women receiving option B+ to prevent mother-to-child transmission (MTCT) of HIV in Tanzania.A cost analysis from a health care sector perspective was conducted using routine data of 2224 pregnant women newly diagnosed with HIV who gave birth between August 2014 and May 2016 in Dar es Salaam, Tanzania. We evaluated risk of infant HIV infection at 12 weeks postnatally in relation to ANC visits (<4 vs ≥4 visits). Costs for service utilisation were estimated through empirical observations and the World Health Organisation Global Price Reporting Mechanism.Mean gestational age at first ANC visit was 22 (±7) weeks. The average number of ANC/prevention of MTCT visits among the 2224 pregnant women in our sample was 3.6 (95% confidence interval [CI] 3.6-3.7), and 57.3% made ≥4 visits. At 12 weeks postnatally, 2.7% (95% CI 2.2-3.6) of HIV exposed infants had been infected. The risk of MTCT decreased with the number of ANC visits: 4.8% (95% CI 3.6-6.4) if the mother had <4 visits, and 1.0% (95% CI 0.5-1.7) at ≥4. The adjusted MTCT rates decreased by 51% (odds ratio 0.49, 95% CI 0.31-0.77) for each additional ANC visit made. The potential cost-saving was 2.2 US$ per woman at ≥4 visits (84.8 US$) compared to <4 visits (87.0 US$), mainly due to less defaulter tracing.Most pregnant women living with HIV in Dar es Salaam initiated ANC late and >40% failed to adhere to the recommended minimum of 4 visits. Improved ANC attendance would likely lead to fewer HIV-infected infants and reduce both short and long-term health care costs due to less spending on defaulter tracing and future treatment costs for the children.
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Affiliation(s)
- Helga Elineema Naburi
- Department of Paediatrics and Child Health, Muhimbili University of Health and Allied Sciences (MUHAS), Dar es Salaam, Tanzania
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Phares Mujinja
- Institute of Public health, Muhimbili University of Health and Allied Sciences (MUHAS), Dar es Salaam, Tanzania
| | - Charles Kilewo
- Departments of Obstetrics and Gynaecology, MUHAS, Dar es Salaam, Tanzania
| | - Gunnel Biberfeld
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Till Bärnighausen
- Department of Global Health and Population, Harvard T.H. Chan School of Public Health, Boston, MA
- Africa Health Research Institute (AHRI), Mtubatuba, South Africa
- Heidelberg Institute of Global Health, Heidelberg University, Heidelberg, Germany
| | - Karim Manji
- Department of Paediatrics and Child Health, Muhimbili University of Health and Allied Sciences (MUHAS), Dar es Salaam, Tanzania
| | - Goodluck Lyatuu
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
- Departments of Obstetrics and Gynaecology, MUHAS, Dar es Salaam, Tanzania
- Management and Development for Health (MDH), Dar es Salaam, Tanzania
| | - Roseline Urrio
- Departments of Obstetrics and Gynaecology, MUHAS, Dar es Salaam, Tanzania
- Management and Development for Health (MDH), Dar es Salaam, Tanzania
| | - Niklas Zethraeus
- Department of Learning, Informatics, Management and Ethics (LIME), Karolinska Institutet, Stockholm, Sweden
| | - Nicola Orsini
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
| | - Anna Mia Ekström
- Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
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Nalubega S, Kyenkya J, Bagaya I, Nabukenya S, Ssewankambo N, Nakanjako D, Kiragga AN. COVID-19 may exacerbate the clinical, structural and psychological barriers to retention in care among women living with HIV in rural and peri-urban settings in Uganda. BMC Infect Dis 2021; 21:980. [PMID: 34544389 PMCID: PMC8451386 DOI: 10.1186/s12879-021-06684-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 09/13/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Retention of pregnant and breastfeeding women and their infants in HIV care still remains low in Uganda. Recent literature has shown that the effects of COVID-19 mitigation measures may increase disease burden of common illnesses including HIV, Tuberculosis, Malaria and other key public health outcomes such as maternal mortality. A research program was undertaken to locate disengaged HIV positive women on option B+ and supported them to reengage in care. A 1 year follow up done following the tracing revealed that some women still disengaged from care. We aimed to establish the barriers to and facilitators for reengagement in care among previously traced women on option B+, and how these could have been impacted by the COVID-19 pandemic. METHODS This was a cross sectional qualitative study using individual interviews conducted in June and July, 2020, a period when the COVID-19 response measures such as lockdown and restrictions on transport were being observed in Uganda. Study participants were drawn from nine peri-urban and rural public healthcare facilities. Purposive sampling was used to select women still engaged in and those who disengaged from care approximately after 1 year since they were last contacted. Seventeen participants were included. Data was analysed using the content analysis approach. RESULTS Women reported various barriers that affected their reengagement and retention in care during the COVID-19 pandemic. These included structural barriers such as transport difficulties and financial constraints; clinical barriers which included unsupportive healthcare workers, short supply of drugs, clinic delays, lack of privacy and medicine side effects; and psychosocial barriers such as perceived or experienced stigma and non-disclosure of HIV sero-status. Supportive structures such as family, community-based medicine distribution models, and a friendly healthcare environment were key facilitators to retention in care among this group. The COVID-19 pandemic was reported to exacerbate the barriers to retention in care. CONCLUSIONS COVID-19 may exacerbate barriers to retention in HIV care among those who have experienced previous disengagement. We recommend community-based models such as drop out centres, peer facilitated distribution and community outreaches as alternative measures for access to ART during the COVID-19 pandemic.
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Affiliation(s)
- Sylivia Nalubega
- Department of Nursing, School of Health Sciences, Soroti University, Po Box, 211, Soroti, Uganda.
| | - Joshua Kyenkya
- Research Department, Infectious Diseases Institute, College of Health Sciences, Makerere University, Kampala, Uganda
| | - Irene Bagaya
- Research Department, Infectious Diseases Institute, College of Health Sciences, Makerere University, Kampala, Uganda
| | - Sylvia Nabukenya
- Research Department, Infectious Diseases Institute, College of Health Sciences, Makerere University, Kampala, Uganda
| | - Nelson Ssewankambo
- Department of Medicine, School of Medicine, College of Health Sciences, Makerere University, Kampala, Uganda
| | - Damalie Nakanjako
- Department of Medicine, School of Medicine, College of Health Sciences, Makerere University, Kampala, Uganda
| | - Agnes N Kiragga
- Research Department, Infectious Diseases Institute, College of Health Sciences, Makerere University, Kampala, Uganda
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Mubiana-Mbewe M, Bosomprah S, Kadota JL, Koyuncu A, Kusanathan T, Mweebo K, Musokotwane K, Mulenga PL, Chi BH, Vinikoor MJ. Effect of Enhanced Adherence Package on Early ART Uptake Among HIV-Positive Pregnant Women in Zambia: An Individual Randomized Controlled Trial. AIDS Behav 2021; 25:992-1000. [PMID: 33033996 PMCID: PMC10580733 DOI: 10.1007/s10461-020-03060-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/03/2020] [Indexed: 10/23/2022]
Abstract
We evaluated the effect of an option B-plus Enhanced Adherence Package (BEAP), on early ART uptake in a randomized controlled trial. HIV-positive, ART naïve pregnant women in Lusaka, Zambia, were randomized to receive BEAP (phone calls/home visits, additional counseling, male partner engagement and missed-visit follow-up) versus standard of care (SOC). The primary outcome was initiating and remaining on ART at 30 days. Analysis was by intention to treat (ITT) using logistic regression. Additional per protocol analysis was done. We enrolled 454 women; 229 randomized to BEAP and 225 to SOC. Within 30 days of eligibility, 445 (98.2%) initiated ART. In ITT analysis, 82.5% BEAP versus 80.4% SOC participants reached primary outcome (crude relative risk [RR] 1.03; 95% confidence interval [CI] 0.91-1.16; Wald test statistic = 0.44; p-value = 0.66). In per protocol analysis, (92 participants (40.2%) excluded), 91.9% BEAP versus 80.4% SOC participants reached primary outcome (crude RR 1.14; 95% CI 1.02-1.29; Wald test statistic = 2.23; p-value = 0.03). Early ART initiation in pregnancy was nearly universal but there was early drop out suggesting need for additional adherence support.This trial was registered at ClinicalTrials.gov (trials number NCT02459678) on May 14, 2015.
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Affiliation(s)
- Mwangelwa Mubiana-Mbewe
- Centre for Infectious Disease Research in Zambia, Plot 34620 Off Alick Nkhata Road, P.O. Box 34681, Lusaka, Zambia.
| | - Samuel Bosomprah
- Centre for Infectious Disease Research in Zambia, Plot 34620 Off Alick Nkhata Road, P.O. Box 34681, Lusaka, Zambia
- Department of Biostatistics, School of Public Health, University of Ghana, Accra, Ghana
| | - Jillian L Kadota
- Centre for Infectious Disease Research in Zambia, Plot 34620 Off Alick Nkhata Road, P.O. Box 34681, Lusaka, Zambia
- Division of Pulmonary and Critical Care Medicine, Zuckerberg San Francisco General Hospital, University of California San Francisco, San Francisco, USA
| | - Aybüke Koyuncu
- Centre for Infectious Disease Research in Zambia, Plot 34620 Off Alick Nkhata Road, P.O. Box 34681, Lusaka, Zambia
| | | | - Keith Mweebo
- Prevention, Care and Treatment Branch, U.S. Centers for Disease Control and Prevention, Lusaka, Zambia
| | - Kebby Musokotwane
- Prevention, Care and Treatment Branch, U.S. Centers for Disease Control and Prevention, Lusaka, Zambia
| | | | - Benjamin H Chi
- Department of Obstetrics and Gynecology, University of North Carolina, Chapel Hill, NC, USA
| | - Michael J Vinikoor
- Centre for Infectious Disease Research in Zambia, Plot 34620 Off Alick Nkhata Road, P.O. Box 34681, Lusaka, Zambia
- Department of Medicine, University of Alabama at Birmingham, Birmingham, USA
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Mutabazi JC, Gray C, Muhwava L, Trottier H, Ware LJ, Norris S, Murphy K, Levitt N, Zarowsky C. Integrating the prevention of mother-to-child transmission of HIV into primary healthcare services after AIDS denialism in South Africa: perspectives of experts and health care workers - a qualitative study. BMC Health Serv Res 2020; 20:582. [PMID: 32586318 PMCID: PMC7318762 DOI: 10.1186/s12913-020-05381-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Accepted: 05/31/2020] [Indexed: 11/23/2022] Open
Abstract
Background Integrating Prevention of Mother-to-Child Transmission (PMTCT) programmes into routine health services under complex socio-political and health system conditions is a priority and a challenge. The successful rollout of PMTCT in sub-Saharan Africa has decreased Human Immunodeficiency Virus (HIV), reduced child mortality and improved maternal health. In South Africa, PMTCT is now integrated into existing primary health care (PHC) services and this experience could serve as a relevant example for integrating other programmes into comprehensive primary care. This study explored the perspectives of both experts or key informants and frontline health workers (FHCWs) in South Africa on PMTCT integration into PHC in the context of post-AIDS denialism using a Complex Adaptive Systems framework. Methods A total of 20 in-depth semi-structured interviews were conducted; 10 with experts including national and international health systems and HIV/PMTCT policy makers and researchers, and 10 FHCWs including clinic managers, nurses and midwives. All interviews were conducted in person, audio-recorded and transcribed. Three investigators collaborated in coding transcripts and used an iterative approach for thematic analysis. Results Experts and FHCWs agreed on the importance of integrated PMTCT services. Experts reported a slow and partial integration of PMTCT programmes into PHC following its initial rollout as a stand-alone programme in the aftermath of the AIDS denialism period. Experts and FHCWs diverged on the challenges associated with integration of PMTCT. Experts highlighted bureaucracy, HIV stigma and discrimination and a shortage of training for staff as major barriers to PMTCT integration. In comparison, FHCWs emphasized high workloads, staff turnover and infrastructural issues (e.g., lack of rooms, small spaces) as their main challenges to integration. Both experts and FHCWs suggested that working with community health workers, particularly in the post-partum period, helped to address cases of loss to follow-up of women and their babies and to improve linkages to polymerase-chain reaction (PCR) testing and immunisation. Conclusions Despite organised efforts in South Africa, experts and FHCWs reported multiple barriers for the full integration of PMTCT in PHC, especially postpartum. The results suggest opportunities to address operational challenges towards more integrated PMTCT and other health services in order to improve maternal and child health.
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Affiliation(s)
- Jean Claude Mutabazi
- Département de médecine sociale et préventive, École de Santé Publique, Université de Montréal, Pavillon 7101, Avenue du Parc, Montréal, QC, H3N 1X7, Canada. .,Centre de recherche en santé publique (CReSP), Université de Montréal et CIUSSS du Centre-Sud-de-l'Île-de-Montréal, Montréal, QC, H3L 1M3, Canada. .,Centre de Recherche du Centre Hospitalier Universitaire Sainte Justine, Montréal, QC, H3T 1C5,, Canada.
| | - Corie Gray
- Collaboration for Evidence, Research and Impact in Public Health, School of Public Health, Curtin University, Kent Street, Bentley, Perth, Western Australia 6102, Australia
| | - Lorrein Muhwava
- Division of Endocrinology, Department of Medicine, Faculty of Health Science, University of Cape Town, Chronic Disease Initiative for Africa, J Floor, Old Main Building, Groote Schuur Hospital, Observatory 7925, Cape Town, Western Cape, South Africa
| | - Helen Trottier
- Département de médecine sociale et préventive, École de Santé Publique, Université de Montréal, Pavillon 7101, Avenue du Parc, Montréal, QC, H3N 1X7, Canada.,Centre de Recherche du Centre Hospitalier Universitaire Sainte Justine, Montréal, QC, H3T 1C5,, Canada
| | - Lisa Jayne Ware
- Developmental Pathways for Health Research Unit, Department of Paediatrics, School of Clinical Medicine, University of the Witwatersrand, 26 Chris Hani Road, Chris Hani Baragwanath Academic Hospital, Soweto, Johannesburg, South Africa
| | - Shane Norris
- Developmental Pathways for Health Research Unit, Department of Paediatrics, School of Clinical Medicine, University of the Witwatersrand, 26 Chris Hani Road, Chris Hani Baragwanath Academic Hospital, Soweto, Johannesburg, South Africa
| | - Katherine Murphy
- Collaboration for Evidence, Research and Impact in Public Health, School of Public Health, Curtin University, Kent Street, Bentley, Perth, Western Australia 6102, Australia
| | - Naomi Levitt
- Collaboration for Evidence, Research and Impact in Public Health, School of Public Health, Curtin University, Kent Street, Bentley, Perth, Western Australia 6102, Australia
| | - Christina Zarowsky
- Département de médecine sociale et préventive, École de Santé Publique, Université de Montréal, Pavillon 7101, Avenue du Parc, Montréal, QC, H3N 1X7, Canada.,Centre de recherche en santé publique (CReSP), Université de Montréal et CIUSSS du Centre-Sud-de-l'Île-de-Montréal, Montréal, QC, H3L 1M3, Canada.,School of Public Health, University of the Western Cape, Robert Sobukwe Rd, Bellville 7535, Cape Town, Western Cape, South Africa
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9
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Wilson N. At-scale evidence from 26 national household surveys on the prevention of mother-to-child transmission of HIV cascade. Health Policy Plan 2020; 34:514-519. [PMID: 31377784 DOI: 10.1093/heapol/czz073] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/02/2019] [Indexed: 11/14/2022] Open
Abstract
Prevention of mother-to-child transmission of HIV (PMTCT) can virtually eliminate vertical HIV transmission, yet more than 160 000 children were newly infected with HIV in 2016. We conducted a pooled analysis of national household surveys from 26 sub-Saharan African countries and calculated PMTCT coverage and access using unconditional and conditional likelihoods. Logistic regression analysis adjusted for country of residence was used to measure the association between socio-demographic factors and PMTCT coverage. The largest loss in the PMTCT cascade access occurred at being offered a HIV test at an antenatal care (ANC) clinic visit, with only 62.6% of women visiting an ANC clinic being offered a HIV test. Logistic regression analysis adjusted for country of residence indicated that completing primary school was associated with a higher likelihood of completing each step in the PMTCT cascade, including being offered a HIV test [odds ratio 2.18 (95% CI: 2.09-2.26)]. Urban residence was associated with a higher likelihood of completing each step in the PMTCT cascade, including being offered a HIV test [odds ratio 2.23 (95% CI: 2.15-2.30)]. To increase progression through the PMTCT cascade, policy-makers should target the likelihood an ANC client is offered a HIV test and the likelihood of facility delivery, steps where access is the lowest. Low educational attainment women and women in rural areas appear to have the lowest coverage in the cascade, suggesting that policy-makers target these individuals.
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Affiliation(s)
- Nicholas Wilson
- Office of Evaluation Sciences, 1800 F St, NW, Washington, DC, USA.,Department of Economics, Reed College, 3203 SE Woodstock Boulevard, Portland, OR, USA
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10
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Twahirwa Rwema JO, Baral S, Ketende S, Phaswana-Mafuya N, Lambert A, Kose Z, Mcingana M, Rao A, Hausler H, Schwartz S. Evaluating the vertical HIV transmission risks among South African female sex workers; have we forgotten PMTCT in their HIV programming? BMC Public Health 2019; 19:605. [PMID: 31138154 PMCID: PMC6538543 DOI: 10.1186/s12889-019-6811-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Background Female sex workers (FSW) have a greater HIV burden compared to other reproductive-aged women and experience high incidence of pregnancies. However, there are limited data on mother-to-child transmission of HIV in the context of sex work. This study assessed the uptake of prevention of mother-to-child transmission (PMTCT) services to understand the vertical HIV transmission risks among FSW in South Africa. Methods FSW ≥18 years were recruited into a cross-sectional study using respondent-driven sampling (RDS) between October 2014–April 2015 in Port Elizabeth, South Africa. An interviewer-administered questionnaire captured information on demographics, reproductive health histories, and HIV care, including engagement in PMTCT care and ART. HIV and pregnancy testing were biologically assessed. This analysis characterizes FSW engagement in HIV prevention and treatment cascades of the four prongs of PMTCT. Results Overall, 410 FSW were enrolled. The RDS-weighted HIV prevalence was 61.5% (95% bootstrapped confidence interval 54.1–68.0). A comprehensive assessment of the four PMTCT prongs showed gaps in cascades for each of the prongs. In Prongs 1 and 2, gaps of 42% in consistent condom use with clients among HIV-negative FSW and 43% in long-term high efficacy contraceptive method use among HIV-positive FSW were observed. The analyses for prongs three and four pertained to 192 women with children < 5 years; 101/192 knew their HIV diagnosis prior to the study, of whom 85% (86/101) had their children tested for HIV after birth, but only 36% (31/86) of those who breastfed retested their children post-breastfeeding. A substantial proportion (35%, 42/120) of all HIV-positive women with children < 5 years of age were HIV-negative at their last delivery and seroconverted after delivery. Less than half (45%) of mothers with children < 5 years (45/101) were on ART and 12% (12/101) reported at least one child under five living with HIV. Conclusion These findings show significant gaps in engagement in the PMTCT cascades for FSW, evidenced by sub-optimal uptake of HIV prevention and treatment in the peri/post-natal periods and insufficient prevention of unintended pregnancies among FSW living with HIV. These gaps result in elevated risks for vertical transmission among FSW and the need for PMTCT services within FSW programs. Electronic supplementary material The online version of this article (10.1186/s12889-019-6811-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Jean Olivier Twahirwa Rwema
- Department of Epidemiology, Key Populations Program, Center for Public Health and Human Rights, Johns Hopkins Bloomberg School of Public Health, 615 N Wolfe Street, Baltimore, MD, 21205, USA.
| | - Stefan Baral
- Department of Epidemiology, Key Populations Program, Center for Public Health and Human Rights, Johns Hopkins Bloomberg School of Public Health, 615 N Wolfe Street, Baltimore, MD, 21205, USA
| | - Sosthenes Ketende
- Department of Epidemiology, Key Populations Program, Center for Public Health and Human Rights, Johns Hopkins Bloomberg School of Public Health, 615 N Wolfe Street, Baltimore, MD, 21205, USA
| | - Nancy Phaswana-Mafuya
- The Human Sciences Research Council, Port Elizabeth, South Africa.,Nelson Mandela Metropolitan University, Port Elizabeth, South Africa
| | | | - Zamakayise Kose
- The Human Sciences Research Council, Port Elizabeth, South Africa
| | - Mfezi Mcingana
- The TB/HIV Care Association, Port Elizabeth, South Africa
| | - Amrita Rao
- Department of Epidemiology, Key Populations Program, Center for Public Health and Human Rights, Johns Hopkins Bloomberg School of Public Health, 615 N Wolfe Street, Baltimore, MD, 21205, USA
| | - Harry Hausler
- The TB/HIV Care Association, Cape Town, South Africa
| | - Sheree Schwartz
- Department of Epidemiology, Key Populations Program, Center for Public Health and Human Rights, Johns Hopkins Bloomberg School of Public Health, 615 N Wolfe Street, Baltimore, MD, 21205, USA
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11
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Valère MK, Nelly K, Mefo N, Pascal F. Mother to Child Transmission of HIV after Option B+ in Low Income Environment. ACTA ACUST UNITED AC 2018. [DOI: 10.4236/ojog.2018.812118] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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12
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Naidoo P, Theron G, Rangaka MX, Chihota VN, Vaughan L, Brey ZO, Pillay Y. The South African Tuberculosis Care Cascade: Estimated Losses and Methodological Challenges. J Infect Dis 2017; 216:S702-S713. [PMID: 29117342 PMCID: PMC5853316 DOI: 10.1093/infdis/jix335] [Citation(s) in RCA: 153] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Background While tuberculosis incidence and mortality are declining in South Africa, meeting the goals of the End TB Strategy requires an invigorated programmatic response informed by accurate data. Enumerating the losses at each step in the care cascade enables appropriate targeting of interventions and resources. Methods We estimated the tuberculosis burden; the number and proportion of individuals with tuberculosis who accessed tests, had tuberculosis diagnosed, initiated treatment, and successfully completed treatment for all tuberculosis cases, for those with drug-susceptible tuberculosis (including human immunodeficiency virus (HIV)–coinfected cases) and rifampicin-resistant tuberculosis. Estimates were derived from national electronic tuberculosis register data, laboratory data, and published studies. Results The overall tuberculosis burden was estimated to be 532005 cases (range, 333760–764480 cases), with successful completion of treatment in 53% of cases. Losses occurred at multiple steps: 5% at test access, 13% at diagnosis, 12% at treatment initiation, and 17% at successful treatment completion. Overall losses were similar among all drug-susceptible cases and those with HIV coinfection (54% and 52%, respectively, successfully completed treatment). Losses were substantially higher among rifampicin- resistant cases, with only 22% successfully completing treatment. Conclusion Although the vast majority of individuals with tuberculosis engaged the public health system, just over half were successfully treated. Urgent efforts are required to improve implementation of existing policies and protocols to close gaps in tuberculosis diagnosis, treatment initiation, and successful treatment completion.
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Affiliation(s)
- Pren Naidoo
- Desmond Tutu TB Centre, Department of Paediatrics and Child Health, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa.,Bill and Melinda Gates Foundation, Seattle, Washington
| | - Grant Theron
- DST/NRF Centre of Excellence for Biomedical Tuberculosis Research.,MRC Centre for Tuberculosis Research, Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa
| | - Molebogeng X Rangaka
- Wellcome Centre for Infectious Disease Research in Africa, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Cape Town, South Africa.,Institute of Global Health, University College London, London, United Kingdom
| | - Violet N Chihota
- Implementation Research Division, Aurum Institute, Johannesburg, South Africa.,School of Public Health, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Louise Vaughan
- DST/NRF Centre of Excellence for Biomedical Tuberculosis Research.,MRC Centre for Tuberculosis Research, Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa
| | - Zameer O Brey
- Bill and Melinda Gates Foundation, Seattle, Washington
| | - Yogan Pillay
- HIV/AIDS, TB, and Maternal and Child Health Branch, National Department of Health, Pretoria, South Africa
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13
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Ford C, Chibwesha CJ, Winston J, Jacobs C, Lubeya MK, Musonda P, Stringer JSA, Chi BH. Women's decision-making and uptake of services to prevent mother-to-child HIV transmission in Zambia. AIDS Care 2017; 30:426-434. [PMID: 28971710 DOI: 10.1080/09540121.2017.1381328] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Women's empowerment is associated with engagement in some areas of healthcare, but its role in prevention of mother-to-child HIV transmission (PMTCT) services has not been previously considered. In this secondary analysis, we investigated the association of women's decision-making and uptake of health services for PMTCT. Using data from population-based household surveys, we included women who reported delivery in the 2-year period prior to the survey and were HIV-infected. We measured a woman's self-reported role in decision-making in her own healthcare, making of large purchases, schooling of children, and healthcare for children. For each domain, respondents were categorized as having an "active" or "no active" role. We investigated associations between decision-making and specific steps along the PMTCT cascade: uptake of maternal antiretroviral drugs, uptake of infant HIV prophylaxis, and infant HIV testing. We calculated unadjusted and adjusted odds ratios via logistic regression. From March to December 2011, 344 HIV-infected mothers were surveyed and 276 completed the relevant survey questions. Of these, 190 (69%) took antiretroviral drugs during pregnancy; 175 (64%) of their HIV-exposed infants received antiretroviral prophylaxis; and 160 (58%) had their infant tested for HIV. There was no association between decision-making and maternal or infant antiretroviral drug use. We observed a significant association between decision-making and infant HIV testing in univariate analyses (OR 1.56-1.85; p < 0.05); however, odds ratios for the decision-making indicators were no longer statistically significant predictors of infant HIV testing in multivariate analyses. In conclusion, women who reported an active role in decision-making trended toward a higher likelihood of uptake of infant testing in the PMTCT cascade. Larger studies are needed to evaluate the impact of empowerment initiatives on the PMTCT service utilization overall and infant testing in particular.
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Affiliation(s)
- Catherine Ford
- a School of Medicine , University of North Carolina , Chapel Hill , NC , USA
| | - Carla J Chibwesha
- a School of Medicine , University of North Carolina , Chapel Hill , NC , USA
| | - Jennifer Winston
- a School of Medicine , University of North Carolina , Chapel Hill , NC , USA
| | - Choolwe Jacobs
- b School of Public Health , University of Zambia , Lusaka , Zambia
| | | | - Patrick Musonda
- b School of Public Health , University of Zambia , Lusaka , Zambia
| | | | - Benjamin H Chi
- a School of Medicine , University of North Carolina , Chapel Hill , NC , USA
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14
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Sam-Agudu NA, Isah C, Fan-Osuala C, Erekaha S, Ramadhani HO, Anaba U, Adeyemi OA, Manji-Obadiah G, Lee D, Cornelius LJ, Charurat M. Correlates of facility delivery for rural HIV-positive pregnant women enrolled in the MoMent Nigeria prospective cohort study. BMC Pregnancy Childbirth 2017; 17:227. [PMID: 28705148 PMCID: PMC5512933 DOI: 10.1186/s12884-017-1417-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2017] [Accepted: 07/05/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Low rates of maternal healthcare service utilization, including facility delivery, may impede progress in the prevention of mother-to-child transmission of HIV (PMTCT) and in reducing maternal and infant mortality. The MoMent (Mother Mentor) study investigated the impact of structured peer support on early infant diagnosis presentation and postpartum maternal retention in PMTCT care in rural Nigeria. This paper describes baseline characteristics and correlates of facility delivery among MoMent study participants. METHODS HIV-positive pregnant women were recruited at 20 rural Primary Healthcare Centers matched by antenatal care clinic volume, client HIV prevalence, and PMTCT service staffing. Baseline and delivery data were collected by participant interviews and medical record abstraction. Multivariate logistic regression with generalized estimating equation analysis was used to evaluate for correlates of facility delivery including exposure to structured (closely supervised Mentor Mother, intervention) vs unstructured (routine, control) peer support. RESULTS Of 497 women enrolled, 352 (71%) were between 21 and 30 years old, 319 (64%) were Christian, 245 (49%) had received secondary or higher education, 402 (81%) were multigravidae and 299 (60%) newly HIV-diagnosed. Delivery data was available for 445 (90%) participants, and 276 (62%) of these women delivered at a health facility. Facility delivery did not differ by type of peer support; however, it was positively associated with secondary or greater education (aOR 1.9, CI 1.1-3.2) and Christian affiliation (OR 1.4, CI 1.0-2.0) and negatively associated with primigravidity (OR 0.5; 0.3-0.9) and new HIV diagnosis (OR 0.6, CI 0.4-0.9). CONCLUSIONS Primary-level or lesser-educated HIV-infected pregnant women and those newly-diagnosed and primigravid should be prioritized for interventions to improve facility delivery rates and ultimately, healthy outcomes. Incremental gains in facility delivery from structured peer support appear limited, however the impact of duration of pre-delivery support needs further investigation. Religious influences on facility delivery and on general maternal healthcare service utilization need to be further explored. TRIAL REGISTRATION ClinicalTrials.gov number NCT01936753 , registered September 2013.
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Affiliation(s)
- Nadia A Sam-Agudu
- International Research Center of Excellence, Institute of Human Virology Nigeria, Plot 252 Herbert McCaulay Way, Abuja, Nigeria. .,Division of Epidemiology and Prevention, Institute of Human Virology, University of Maryland School of Medicine, Baltimore, USA. .,Clinical Department, Institute of Human Virology Nigeria, Abuja, Nigeria.
| | - Christopher Isah
- International Research Center of Excellence, Institute of Human Virology Nigeria, Plot 252 Herbert McCaulay Way, Abuja, Nigeria
| | - Chinenye Fan-Osuala
- International Research Center of Excellence, Institute of Human Virology Nigeria, Plot 252 Herbert McCaulay Way, Abuja, Nigeria
| | - Salome Erekaha
- International Research Center of Excellence, Institute of Human Virology Nigeria, Plot 252 Herbert McCaulay Way, Abuja, Nigeria
| | - Habib O Ramadhani
- Division of Epidemiology and Prevention, Institute of Human Virology, University of Maryland School of Medicine, Baltimore, USA
| | - Udochisom Anaba
- International Research Center of Excellence, Institute of Human Virology Nigeria, Plot 252 Herbert McCaulay Way, Abuja, Nigeria
| | - Olusegun A Adeyemi
- Clinical Department, Institute of Human Virology Nigeria, Abuja, Nigeria
| | - Grace Manji-Obadiah
- International Research Center of Excellence, Institute of Human Virology Nigeria, Plot 252 Herbert McCaulay Way, Abuja, Nigeria
| | - Daniel Lee
- University of Maryland School of Medicine, Baltimore, USA
| | - Llewellyn J Cornelius
- School of Social Work and College of Public Health, University of Georgia Athens, Athens, USA
| | - Manhattan Charurat
- Division of Epidemiology and Prevention, Institute of Human Virology, University of Maryland School of Medicine, Baltimore, USA
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