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Bell GJ, Goel V, Essone P, Dosoo D, Adu B, Mensah BA, Gyaase S, Wiru K, Mougeni F, Osei M, Minsoko P, Sinai C, Niaré K, Juliano JJ, Hudgens M, Ghansah A, Kamthunzi P, Mvalo T, Agnandji ST, Bailey JA, Asante KP, Emch M. Malaria Transmission Intensity Likely Modifies RTS, S/AS01 Efficacy Due to a Rebound Effect in Ghana, Malawi, and Gabon. J Infect Dis 2022; 226:1646-1656. [PMID: 35899811 PMCID: PMC10205900 DOI: 10.1093/infdis/jiac322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 07/26/2022] [Indexed: 01/27/2023] Open
Abstract
BACKGROUND RTS,S/AS01 is the first malaria vaccine to be approved and recommended for widespread implementation by the World Health Organization (WHO). Trials reported lower vaccine efficacies in higher-incidence sites, potentially due to a "rebound" in malaria cases in vaccinated children. When naturally acquired protection in the control group rises and vaccine protection in the vaccinated wanes concurrently, malaria incidence can become greater in the vaccinated than in the control group, resulting in negative vaccine efficacies. METHODS Using data from the 2009-2014 phase III trial (NCT00866619) in Lilongwe, Malawi; Kintampo, Ghana; and Lambaréné, Gabon, we evaluate this hypothesis by estimating malaria incidence in each vaccine group over time and in varying transmission settings. After estimating transmission intensities using ecological variables, we fit models with 3-way interactions between vaccination, time, and transmission intensity. RESULTS Over time, incidence decreased in the control group and increased in the vaccine group. Three-dose efficacy in the lowest-transmission-intensity group (0.25 cases per person-year [CPPY]) decreased from 88.2% to 15.0% over 4.5 years, compared with 81.6% to -27.7% in the highest-transmission-intensity group (3 CPPY). CONCLUSIONS These findings suggest that interventions, including the fourth RTS,S dose, that protect vaccinated individuals during the potential rebound period should be implemented for high-transmission settings.
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Affiliation(s)
- Griffin J Bell
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Varun Goel
- Carolina Population Center, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Paulin Essone
- Centre de Recherches Médicales de Lambaréné, Lambaréné, Gabon
| | - David Dosoo
- Kintampo Health Research Centre, Kintampo, Ghana
| | - Bright Adu
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Ghana
| | | | | | - Kenneth Wiru
- Kintampo Health Research Centre, Kintampo, Ghana
| | - Fabrice Mougeni
- Centre de Recherches Médicales de Lambaréné, Lambaréné, Gabon
| | - Musah Osei
- Kintampo Health Research Centre, Kintampo, Ghana
| | - Pamela Minsoko
- Centre de Recherches Médicales de Lambaréné, Lambaréné, Gabon
| | - Cyrus Sinai
- Carolina Population Center, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Karamoko Niaré
- Department of Pathology and Laboratory Medicine, Brown University, Providence, Rhode Island, USA
| | - Jonathan J Juliano
- Division of Infectious Diseases, School of Medicine, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Michael Hudgens
- Department of Biostatistics, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Anita Ghansah
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Ghana
| | | | | | - Selidji Todagbe Agnandji
- Centre de Recherches Médicales de Lambaréné, Lambaréné, Gabon
- Institute of Tropical Medicine, University of Tübingen, Tübingen, Germany
| | - Jeffrey A Bailey
- Department of Pathology and Laboratory Medicine, Brown University, Providence, Rhode Island, USA
| | | | - Michael Emch
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina, USA
- Carolina Population Center, University of North Carolina, Chapel Hill, North Carolina, USA
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Mvalo T, McCollum ED, Fitzgerald E, Kamthunzi P, Schmicker RH, May S, Phiri M, Chirombo C, Phiri A, Ginsburg AS. Chest radiography in children aged 2-59 months enrolled in the Innovative Treatments in Pneumonia (ITIP) project in Lilongwe Malawi: a secondary analysis. BMC Pediatr 2022; 22:31. [PMID: 35012490 PMCID: PMC8744340 DOI: 10.1186/s12887-021-03091-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 12/20/2021] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Pneumonia is the leading infectious cause of death in children aged under 5 years in low- and middle-income countries (LMICs). World Health Organization (WHO) pneumonia diagnosis guidelines rely on non-specific clinical features. We explore chest radiography (CXR) findings among select children in the Innovative Treatments in Pneumonia (ITIP) project in Malawi in relation to clinical outcomes. METHODS When clinically indicated, CXRs were obtained from ITIP-enrolled children aged 2 to 59 months with community-acquired pneumonia hospitalized with treatment failure or relapse. ITIP1 (fast-breathing pneumonia) and ITIP2 (chest-indrawing pneumonia) trials enrolled children with non-severe pneumonia while ITIP3 enrolled children excluded from ITIP1 and ITIP2 with severe pneumonia and/or selected comorbidities. A panel of trained pediatricians classified the CXRs using the standardized WHO CXR research methodology. We analyzed the relationship between CXR classifications, enrollee characteristics, and outcomes. RESULTS Between March 2016 and June 2018, of 114 CXRs obtained, 83 met analysis criteria with 62.7% (52/83) classified as having significant pathology per WHO standardized interpretation. ITIP3 (92.3%; 12/13) children had a higher proportion of CXRs with significant pathology compared to ITIP1 (57.1%, 12/21) and ITIP2 (57.1%, 28/49) (p-value = 0.008). The predominant pathological CXR reading was "other infiltrates only" in ITIP1 (83.3%, 10/12) and ITIP2 (71.4%, 20/28), while in ITIP3 it was "primary endpoint pneumonia"(66.7%, 8/12,; p-value = 0.008). The percent of CXRs with significant pathology among children clinically cured (60.6%, 40/66) vs those not clinically cured (70.6%, 12/17) at Day 14 was not significantly different (p-value = 0.58). CONCLUSIONS In this secondary analysis we observed that ITIP3 children with severe pneumonia and/or selected comorbidities had a higher frequency of CXRs with significant pathology, although these radiographic findings had limited relationship to Day 14 outcomes. The proportion of CXRs with "primary endpoint pneumonia" was low. These findings add to existing data that additional diagnostics and prognostics are important for improving the care of children with pneumonia in LMICs. TRIAL REGISTRATION ITIP1, ITIP2, and ITIP3 were registered with ClinicalTrials.gov ( NCT02760420 , NCT02678195 , and NCT02960919 , respectively).
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Affiliation(s)
- Tisungane Mvalo
- Lilongwe Medical Relief Fund Trust, University of North Carolina Project, Lilongwe, Malawi.
- Department of Pediatrics, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA.
| | - Eric D McCollum
- Global Program in Respiratory Sciences, Eudowood Division of Pediatric Respiratory Sciences, Department of Pediatrics, School of Medicine, Johns Hopkins University, Baltimore, MD, USA
- Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - Elizabeth Fitzgerald
- Lilongwe Medical Relief Fund Trust, University of North Carolina Project, Lilongwe, Malawi
- Department of Pediatrics, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Portia Kamthunzi
- Lilongwe Medical Relief Fund Trust, University of North Carolina Project, Lilongwe, Malawi
- Institute for Global Health and Infectious Diseases, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Robert H Schmicker
- University of Washington Clinical Trial Center, Seattle, Washington, USA
| | - Susanne May
- University of Washington Clinical Trial Center, Seattle, Washington, USA
| | - Melda Phiri
- Lilongwe Medical Relief Fund Trust, University of North Carolina Project, Lilongwe, Malawi
| | - Claightone Chirombo
- Lilongwe Medical Relief Fund Trust, University of North Carolina Project, Lilongwe, Malawi
| | - Ajib Phiri
- Department of Pediatrics and Child Health, College of Medicine, University of Malawi, Lilongwe Campus, Lilongwe, Malawi
| | - Amy Sarah Ginsburg
- University of Washington Clinical Trial Center, Seattle, Washington, USA
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3
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Fairlie L, Chernoff M, Cotton MF, Bwakura-Dangarembizi M, Violari A, Familiar-Lopez I, Barlow-Mosha L, Kamthunzi P, McCarthy K, Jean-Philippe P, Laughton B, Palumbo PE, Boivin MJ. Antiretroviral choice and severe disease predict poorer neuropsychological outcomes in HIV+ children from Africa. Front Pediatr 2022; 10:899002. [PMID: 35989995 PMCID: PMC9382189 DOI: 10.3389/fped.2022.899002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 07/13/2022] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND The International Maternal Pediatric Adolescent AIDS Clinical Trials Network (IMPAACT) P1104s study evaluated neuropsychological outcomes over 96 weeks in children living with HIV (CLHIV) aged 5-11 years at 6 Sub-Saharan African sites to explore associations between HIV-illness related biomarkers and neuropsychological outcomes. METHODS Children living with HIV had participated in IMPAACT P1060, which compared efficacy of nevirapine versus lopinavir/ritonavir in children initiating ART at <3 years of age. At age 5-11, neuropsychological evaluations of KABC cognitive ability, TOVA attention-impulsivity and BOT-2 motor domains were assessed and repeated after 48 and 96 weeks. Clinical, antiretroviral therapy (ART) and laboratory (immunological and virological) parameters were used to predict neuropsychological outcomes using linear mixed-effects multivariable regression models, controlling for child and caregiver characteristics. RESULTS 246 CLHIV (45% male, mean age at initial neuropsychological evaluation 7.1 yrs [SD 1.2]) began ART at a median age 14.9 months (IQR 8.2, 25.2). Nadir CD4 percentage was 14.7% (IQR 11.0, 19.5); the median peak viral load (VL) was 750 000 copies/ml (IQR 366 000, 750 000) and 63% had ≥WHO stage 3 clinical disease; 164 (67%) were on lopinavir/ritonavir, 71 (29%) were on nevirapine and 7 (3%) were on efavirenz. Other antiretrovirals were similar. Nevirapine at P1104s study start or later was associated with poorer neuropsychological scores across all domains except Global Executive Composite, even when controlling for nadir CD4 percent and time-varying HIV VL. Other predictors of poorer scores in KABC domains included low birth weight, WHO stage 4 disease and serious illness history and elevated VL was associated with worse BOT-2 scores. CONCLUSION Children receiving nevirapine had poorer neuropsychological scores than those on lopinavir/ritonavir. Antiretroviral choice might adversely impact neuropsychological performance. In addition, low birth weight and markers of severe HIV disease: advanced WHO clinical HIV disease, history of serious illness and an elevated VL, were associated with lower neuropsychological scores.
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Affiliation(s)
- Lee Fairlie
- Wits Reproductive Health and HIV Institute, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Miriam Chernoff
- Center for Biostatistics in AIDS Research, Harvard T.H. Chan School of Public Health, Boston, MA, United States
| | - Mark F Cotton
- Family Centre for Research with Ubuntu, Department of Paediatrics and Child Health, Tygerberg Hospital, Stellenbosch University, Tygerberg, South Africa
| | - Mutsa Bwakura-Dangarembizi
- Harare Family Care CRS, College of Health Sciences Clinical Trials Unit, University of Zimbabwe, Harare, Zimbabwe
| | - Avy Violari
- Perinatal HIV Research Unit, University of the Witwatersrand, Johannesburg, South Africa
| | - Itziar Familiar-Lopez
- Department of Psychiatry, Michigan State University, East Lansing, MI, United States
| | - Linda Barlow-Mosha
- Makerere University-Johns Hopkins University Research Collaboration, MU-JHU Care Ltd., CRS, Kampala, Uganda
| | - Portia Kamthunzi
- University of North Carolina Project-Lilongwe, Malawi CRS, Lilongwe, Malawi
| | | | - Patrick Jean-Philippe
- National Institute of Allergy and Infectious Diseases, National Institute of Health, Rockville, MD, United States
| | - Barbara Laughton
- Family Centre for Research with Ubuntu, Department of Paediatrics and Child Health, Tygerberg Hospital, Stellenbosch University, Tygerberg, South Africa
| | - Paul E Palumbo
- Geisel School of Medicine at Dartmouth, Hanover, NH, United States
| | - Michael J Boivin
- Department of Psychiatry, Michigan State University, East Lansing, MI, United States.,Department of Neurology and Ophthalmology, Michigan State University, East Lansing, MI, United States.,Department of Psychiatry, The University of Michigan, Ann Arbor, MI, United States
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Kamthunzi P. Impact of PCV13 vaccination in Blantyre, Malawi. Lancet Glob Health 2021; 9:e893-e894. [PMID: 34143985 DOI: 10.1016/s2214-109x(21)00258-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 05/18/2021] [Indexed: 10/21/2022]
Affiliation(s)
- Portia Kamthunzi
- UNC Project-Malawi, Tidziwe Centre, Kamuzu Central Hospital, Lilongwe, Malawi.
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Mathad JS, Savic R, Britto P, Jayachandran P, Wiesner L, Montepiedra G, Norman J, Zhang N, Townley E, Chakhtoura N, Bradford S, Patil S, Popson S, Chipato T, Rouzier V, Langat D, Chalermchockcharoentkit A, Kamthunzi P, Gupta A, Dooley KE. Pharmacokinetics and Safety of Three Months of Weekly Rifapentine and Isoniazid for Tuberculosis Prevention in Pregnant Women. Clin Infect Dis 2021; 74:1604-1613. [PMID: 34323955 PMCID: PMC9070820 DOI: 10.1093/cid/ciab665] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Indexed: 11/14/2022] Open
Abstract
Background Pregnancy increases the risk of tuberculosis and its complications. A 3-month regimen of weekly isoniazid and rifapentine (3HP) is safe and effective for tuberculosis prevention in adults and children, including those with HIV, but 3HP has not been evaluated in pregnancy. Methods IMPAACT 2001 was a phase I/II trial evaluating the pharmacokinetics and safety of 3HP among pregnant women with indications for tuberculosis preventative therapy in Haiti, Kenya, Malawi, Thailand, and Zimbabwe (NCT02651259). Isoniazid and rifapentine were provided at standard doses (900 mg/week). Pharmacokinetic sampling was performed with the first (second/third trimester) and twelfth (third trimester/postpartum) doses. Nonlinear mixed-effects models were used to estimate drug population pharmacokinetics. Results Of 50 participants, 20 had HIV and were taking efavirenz-based antiretroviral therapy. Among women without HIV, clearance of rifapentine was 28% lower during pregnancy than postpartum (1.20 vs 1.53 L/hour, P < .001), with area under the concentration-time curve (AUCSS) of 786 and 673 mg × hour/L, respectively. In pregnant women with HIV, clearance was 30% higher than women without HIV (P < .001), resulting in lower AUCss (522 mg × hour/L); clearance did not change significantly between pregnancy and postpartum. Pregnancy did not impact isoniazid pharmacokinetics. There were no drug-related serious adverse events, treatment discontinuations, or tuberculosis cases in women or infants. Conclusions 3HP does not require dose adjustment in pregnancy. Rifapentine clearance is higher among women with HIV, but all women achieved exposures of rifapentine and isoniazid associated with successful tuberculosis prevention. The data support proceeding with larger safety-focused studies of 3HP in pregnancy. Clinical Trials Registration ClinicalTrials.gov, NCT02651259.
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Affiliation(s)
- Jyoti S Mathad
- Department of Medicine and Obstetrics & Gynecology, Center for Global Health, Weill Cornell Medicine, New York, NY, USA
| | - Rada Savic
- University of California-San Francisco, San Francisco, CA, USA
| | - Paula Britto
- Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | | | - Lubbe Wiesner
- Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town, South Africa
| | | | - Jennifer Norman
- Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - Nan Zhang
- University of California-San Francisco, San Francisco, CA, USA
| | - Ellen Townley
- Division of AIDS, National Institute of Allergy and Infectious Diseases, Rockville, MD, USA
| | - Nahida Chakhtoura
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, MD, USA
| | | | | | - Stephanie Popson
- Frontier Science & Technology Research Foundation, Inc., Amherst, NY, USA
| | - Tsungai Chipato
- University of Zimbabwe College of Health Sciences-Clinical Trials Research Centre, Harare, Zimbabwe
| | - Vanessa Rouzier
- Department of Medicine and Obstetrics & Gynecology, Center for Global Health, Weill Cornell Medicine, New York, NY, USA.,Les Centres GHESKIO Clinical Research Site, Port-au-Prince, Haiti
| | - Deborah Langat
- Kenya Medical Research Institute / Walter Reed Project Clinical Research Center, Kericho, Kenya
| | | | | | - Amita Gupta
- BJ Medical College-Johns Hopkins CTU, Pune, India.,Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Kelly E Dooley
- Johns Hopkins University School of Medicine, Baltimore, MD, USA
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Tegha G, Topazian HM, Kamthunzi P, Howard T, Tembo Z, Mvalo T, Chome N, Kumwenda W, Mkochi T, Hernandez A, Ataga KI, Hoffman IF, Ware RE. Prospective Newborn Screening for Sickle Cell Disease and Other Inherited Blood Disorders in Central Malawi. Int J Public Health 2021; 66:629338. [PMID: 34335138 PMCID: PMC8284589 DOI: 10.3389/ijph.2021.629338] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Accepted: 06/11/2021] [Indexed: 11/13/2022] Open
Abstract
Objectives: Newborn screening in the United States and Europe allows early identification of congenital disorders but does not yet exist in most low-resource settings, especially in sub-Saharan Africa. Newborn screening can identify multiple inherited hematological disorders, but feasibility and effectiveness for Africa are not fully determined. Methods: Surplus dried blood spot collected in Central Malawi through the HIV Early Infant Diagnosis surveillance program were repurposed and tested by isoelectric focusing for sickle cell disease and trait. Additional genetic testing identified G6PD deficiency and alpha thalassemia. Results: Testing of 10,529 cards revealed an overall sickle cell trait prevalence of 7.0% (range 3.9-9.7% by district); 10 of 14 infants identified with sickle cell disease (prevalence 0.1%) were located and received care at a specialized clinic. Subsequent testing of 1,329 randomly selected cards identified alpha thalassemia trait in 45.7% of samples, and G6PD deficiency in 20.4% of males and 3.4% of females, with 29.0% of females as heterozygous carriers. Conclusion: Inherited hematological disorders are common in Central Malawi; early identification through newborn screening can improve clinical outcomes and should be supported throughout Africa.
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Affiliation(s)
- Gerald Tegha
- University of North Carolina Project-Malawi, Lilongwe, Malawi
| | - Hillary M. Topazian
- University of North Carolina Project-Malawi, Lilongwe, Malawi
- Department of Epidemiology, University of North Carolina, Chapel Hill, NC, United States
| | - Portia Kamthunzi
- University of North Carolina Project-Malawi, Lilongwe, Malawi
- Institute for Global Health and Infectious Diseases, University of North Carolina, Chapel Hill, NC, United States
| | - Thad Howard
- Division of Hematology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States
| | - Zondwayo Tembo
- University of North Carolina Project-Malawi, Lilongwe, Malawi
| | - Tisungane Mvalo
- University of North Carolina Project-Malawi, Lilongwe, Malawi
- Department of Pediatrics, University of North Carolina, Chapel Hill, NC, United States
| | - Nelecy Chome
- University of North Carolina Project-Malawi, Lilongwe, Malawi
| | - Wiza Kumwenda
- University of North Carolina Project-Malawi, Lilongwe, Malawi
| | - Tawonga Mkochi
- University of North Carolina Project-Malawi, Lilongwe, Malawi
| | - Arielle Hernandez
- Division of Hematology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States
| | - Kenneth I. Ataga
- Center for Sickle Cell Disease, The University of Tennessee Health Science Center, Memphis, TN, United States
| | - Irving F. Hoffman
- University of North Carolina Project-Malawi, Lilongwe, Malawi
- Institute for Global Health and Infectious Diseases, University of North Carolina, Chapel Hill, NC, United States
| | - Russell E. Ware
- Division of Hematology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, United States
- Global Health Center, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States
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Libous JL, Montañez NA, Dow DE, Kapetanovic S, Buckley J, Kakhu TJ, Kamthunzi P, Maliwichi LA, Vhembo T, Chawana TD, Nematadzira T, Donenberg GR. IMPAACT 2016: Operationalizing HIV Intervention Adaptations to Inform the Science and Outcomes of Implementation. Front Reprod Health 2021; 3:662912. [PMID: 36303985 PMCID: PMC9580741 DOI: 10.3389/frph.2021.662912] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 04/08/2021] [Indexed: 02/03/2023] Open
Abstract
Introduction: Uptake of evidence-based interventions for adolescents and young adults living with HIV (AYA-LWH) in sub-Saharan Africa (SSA) is complex, and cultural differences necessitate local adaptations to enhance effective implementation. Few models exist to guide intervention tailoring, yet operationalizing strategies is critical to inform science and implementation outcomes, namely acceptability, appropriateness, feasibility, fidelity, and sustainability. This paper describes operationalizing the ADAPT-ITT framework applied to a manualized trauma-informed cognitive behavioral therapy (TI-CBT) intervention addressing mental and sexual health for AYA-LWH in SSA in preparation for a randomized controlled trial (RCT). Methods: Phase 1 of the RCT focused on operationalizing ADAPT-ITT steps 3-7 to tailor the intervention for use in eight sites across Botswana, Malawi, South Africa, and Zimbabwe. Well-defined processes were developed to supplement the general guidelines for each step to provide clear, consistent direction on how to prepare and conduct each step, including documenting, assessing, and determining adaptations, while maintaining intervention fidelity. The processes provided efficient standardized step-by-step progression designed for future replication. All sites participated in Phase 1 using the created tools and strategies to translate and present the TI-CBT to community stakeholders for feedback informing local adaptations. Results: The research team developed and operationalized materials guiding adaptation. A translation review process verified local adaptability, maintained core concepts, and revealed differing interpretations of words, idioms, and culturally acceptable activities. Strategically designed tools comprised of feedback and translation verification forms resulted in meticulous management of adaptations. Robust collaborations between investigators, research managers, site personnel, and topical experts maximized multidisciplinary expertise, resulting in ~10-15 personnel per site facilitating, collecting, assessing, and integrating local feedback. Processes and tools operationalized in steps 3-7 effectively addressed implementation outcomes during community engagements (n = 108), focus groups (n = 5-8 AYA-LWH and caregivers per group), and strategic training of youth leaders. Discussion: This paper offers a novel generalizable approach using well-defined processes to guide intervention adaptation building on the ADAPT-ITT framework. The processes strengthen the science of implementation and provide much-needed specificity in adaptation steps to optimize and sustain real-world impact and help researchers and community stakeholders maximize existing infrastructure, culture, and resources to inform implementation strategies.
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Affiliation(s)
- Jennifer L. Libous
- International Maternal Pediatric Adolescent AIDS Clinical Trials Network, Science Facilitation, FHI 360, Washington, DC, United States
| | - Nicole A. Montañez
- International Maternal Pediatric Adolescent AIDS Clinical Trials Network, Science Facilitation, FHI 360, Washington, DC, United States
| | - Dorothy E. Dow
- Division of Pediatrics Infectious Diseases, Duke University Medical Center, Durham, NC, United States
| | - Suad Kapetanovic
- Department of Psychiatry and the Behavioral Sciences, University of Southern California, Los Angeles, CA, United States
| | - Janice Buckley
- Soweto International Maternal Pediatric Adolescent AIDS Clinical Trials Network Clinical Research Site, Johannesburg, South Africa
| | - Tebogo Jacqueline Kakhu
- Gaborone Prevention/Treatment Trials Clinical Research Site, Botswana-Harvard School of Public Health-AIDS Initiative Partnership Clinical Trials Unit, Gaborone, Botswana
| | - Portia Kamthunzi
- Malawi Clinical Research Site, University of North Carolina Project, Lilongwe, Malawi
| | - Limbika A. Maliwichi
- College of Medicine-Johns Hopkins University Blantyre Clinical Research Site, Department of Psychology, University of Malawi-Chancellor College, Zomba, Malawi
| | - Tichaona Vhembo
- Harare Family Care Clinical Research Site, University of Zimbabwe Clinical Trials Research Centre, Harare, Zimbabwe
| | - Tariro Dianah Chawana
- St. Mary's Clinical Research Site, University of Zimbabwe Clinical Trials Research Centre, Chitungwiza, Zimbabwe
| | - Teacler Nematadzira
- Seke North Clinical Research Site, University of Zimbabwe Clinical Trials Research Centre, Chitungwiza, Zimbabwe
| | - Geri R. Donenberg
- Healthy Youths Program, Department of Medicine, Center for Dissemination and Implementation Science, University of Illinois at Chicago, Chicago, IL, United States
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8
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Owor M, Tierney C, Ziemba L, Browning R, Moye J, Graham B, Reding C, Costello D, Norman J, Wiesner L, Hughes E, Whalen ME, Purdue L, Mmbaga BT, Kamthunzi P, Kawalazira R, Nathoo K, Bradford S, Coletti A, Aweeka F, Musoke P. Pharmacokinetics and Safety of Zidovudine, Lamivudine, and Lopinavir/Ritonavir in HIV-infected Children With Severe Acute Malnutrition in Sub-Saharan Africa: IMPAACT Protocol P1092. Pediatr Infect Dis J 2021; 40:446-452. [PMID: 33464021 PMCID: PMC8043511 DOI: 10.1097/inf.0000000000003055] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/19/2020] [Indexed: 11/25/2022]
Abstract
BACKGROUND Severe acute malnutrition (SAM) may alter the pharmacokinetics (PK), efficacy, and safety of antiretroviral therapy. The phase IV study, IMPAACT P1092, compared PK, safety, and tolerability of zidovudine (ZDV), lamivudine (3TC), and lopinavir/ritonavir (LPV/r) in children with and without SAM. MATERIALS AND METHODS Children living with HIV 6 to <36 months of age with or without World Health Organization (WHO)-defined SAM received ZDV, 3TC, and LPV/r syrup for 48 weeks according to WHO weight band dosing. Intensive PK sampling was performed at weeks 1, 12, and 24. Plasma drug concentrations were measured using liquid chromatography tandem mass spectrometry. Steady-state mean area under the curve (AUC0-12h) and clearance (CL/F) for each drug were compared. Grade ≥3 adverse events were compared between cohorts. RESULTS Fifty-two children were enrolled across 5 sites in Africa with 44% (23/52) female, median age 19 months (Q1, Q3: 13, 25). Twenty-five children had SAM with entry median weight-for-height Z-score (WHZ) -3.4 (IQR -4.0, -3.0) and 27 non-SAM had median WHZ -1.0 (IQR -1.8, -0.1). No significant differences in mean AUC0-12h or CL/F were observed (P ≥ 0.09) except for lower 3TC AUC0-12h (GMR, 0.60; 95% CI, 0.4-1.0; P = 0.047) at week 12, higher ZDV AUC0-12h (GMR, 1.52; 1.2-2.0; P = 0.003) at week 24 in the SAM cohort compared with non-SAM cohort. Treatment-related grade ≥3 events did not differ significantly between cohorts (24.0% vs. 25.9%). CONCLUSION PK and safety findings for ZDV, 3TC, and LPV/r support current WHO weight band dosing of syrup formulations in children with SAM.
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Affiliation(s)
- Maxensia Owor
- From the Makerere University—Johns Hopkins University Research Collaboration, Kampala, Uganda
| | - Camlin Tierney
- Department of Biostatistics, Center for Biostatistics in AIDS Research, Harvard T.H Chan School of Public Health, Boston, MA
| | - Lauren Ziemba
- Department of Biostatistics, Center for Biostatistics in AIDS Research, Harvard T.H Chan School of Public Health, Boston, MA
| | - Renee Browning
- National Institute of Allergy and Infectious Diseases, Bethesda, MD
| | | | | | | | - Diane Costello
- IMPAACT Laboratory Center, University of California, Los Angeles, CA
| | - Jennifer Norman
- Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - Lubbe Wiesner
- Division of Clinical Pharmacology, Department of Medicine, University of Cape Town, Cape Town, South Africa
| | - Emma Hughes
- Department of Clinical Pharmacy, University of California, San Francisco, San Francisco, CA
| | - Meghan E. Whalen
- Department of Clinical Pharmacy, University of California, San Francisco, San Francisco, CA
| | | | - Blandina Theophil Mmbaga
- Kilimanjaro Clinical Research Institute—Kilimanjaro Christian Medical Center and Kilimanjaro Christian Medical University College, Moshi, Tanzania
| | | | - Rachel Kawalazira
- College of Medicine, Johns Hopkins Research Project, Blantyre, Malawi
| | - Kusum Nathoo
- College of Health Sciences, University of Zimbabwe, Avondale, Harare, Zimbabwe
| | | | | | - Francesca. Aweeka
- Department of Clinical Pharmacy, University of California, San Francisco, San Francisco, CA
| | - Philippa Musoke
- From the Makerere University—Johns Hopkins University Research Collaboration, Kampala, Uganda
- Department of Paediatrics and Child Health, College of Health Sciences, Makerere University, Kampala, Uganda
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9
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Boivin MJ, Chernoff M, Fairlie L, Laughton B, Zimmer B, Joyce C, Barlow-Mosha L, Bwakura-Dangarembizi M, Vhembo T, Ratswana M, Kamthunzi P, McCarthy K, Familiar-Lopez I, Jean-Philippe P, Coetzee J, Abrahams N, Gous H, Violari A, Cotton MF, Palumbo PE. African Multi-Site 2-Year Neuropsychological Study of School-Age Children Perinatally Infected, Exposed, and Unexposed to Human Immunodeficiency Virus. Clin Infect Dis 2021; 71:e105-e114. [PMID: 31848582 DOI: 10.1093/cid/ciz1088] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Accepted: 10/31/2019] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Children living with human immunodeficiency virus (HIV) are at neuropsychological risk for cognitive and motor dysfunction. However, few prospective, multi-site studies have evaluated neuropsychological outcomes longitudinally among perinatally infected African children who received early antiretroviral treatment (ART). METHODS We enrolled 611 children aged 5 to 11 years at 6 sites (South Africa [3], Zimbabwe, Malawi, Uganda). Of these, there were 246 children living with HIV (HIV+) who were initiated on ART before 3 years of age in a prior clinical trial comparing nevirapine to lopinavir/ritonavir (International Maternal Pediatric Adolescent Acquired Immunodeficiency Syndrome Clinical Trials [IMPAACT] P1060); 183 age-matched, exposed but uninfected (HEU) children; and 182 unexposed and uninfected (HUU) children. They were compared across 3 assessment time points (Weeks 0, 48, and 96) on cognitive ability (Kaufman Assessment Battery for Children, second edition [KABC-II]), attention/impulsivity (Tests of Variables of Attention [TOVA]), motor proficiency (Bruininks-Oseretsky Test, second edition [BOT-2]), and on the Behavior Rating Inventory of Executive Function (BRIEF). The cohorts were compared using linear mixed models, adjusting for site, child's age and sex, and selected personal/family control variables. RESULTS The HIV+ cohort performed significantly worse than the HEU and HUU cohorts for all KABC-II, TOVA, and BOT-2 performance outcomes across all 3 time points (P values < .001). The HUU and HEU cohorts were comparable. For the KABC-II planning/reasoning subtests, the HIV+ children showed less improvement over time than the HUU and HEU groups. The groups did not differ significantly on the BRIEF. CONCLUSIONS Despite initiation of ART in early childhood and good viral suppression at the time of enrollment, the HIV+ group had poorer neuropsychological performance over time, with the gap progressively worsening in planning/reasoning. This can be debilitating for self-management in adolescence.
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Affiliation(s)
- Michael J Boivin
- Department of Psychiatry, Michigan State University, East Lansing, Michigan, USA.,Department of Neurology and Ophthalmology, Michigan State University, East Lansing, Michigan, USA.,Department of Psychiatry, the University of Michigan, Ann Arbor, Michigan, USA
| | - Miriam Chernoff
- Center for Biostatistics in Acquired Immunodeficiency Syndrome Research, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Lee Fairlie
- Wits Reproductive Health and Human Immunodeficiency Virus Research Centre, Shandukani Clinic, Johannesburg, South Africa
| | - Barbara Laughton
- Family Centre for Research with UBUNTU, Department of Paediatrics and Child Health, Tygerberg Hospital, Stellenbosch University, Cape Town, South Africa
| | | | - Celeste Joyce
- Perinatal Human Immunodeficiency Virus Research Unit, University of the Witwatersrand, Johannesburg, South Africa
| | - Linda Barlow-Mosha
- Makerere University-Johns Hopkins University Research Collaboration CRS, Kampala, Uganda
| | | | - Tichaona Vhembo
- Harare Family Care CRS, University of Zimbabwe, College of Health Sciences Clinical Trials Unit, Harare, Zimbabwe
| | - Mmule Ratswana
- Wits Reproductive Health and Human Immunodeficiency Virus Research Centre, Shandukani Clinic, Johannesburg, South Africa
| | - Portia Kamthunzi
- University of North Carolina Project-Lilongwe, Malawi CRS, Lilongwe, Malawi
| | - Katie McCarthy
- Clinical Research Management, FHI360, Durham, North Carolina, USA
| | | | - Patrick Jean-Philippe
- National Institute of Allergy and Infectious Diseases, National Institute of Health, Rockville, Maryland, USA
| | - Joan Coetzee
- Family Centre for Research with UBUNTU, Department of Paediatrics and Child Health, Tygerberg Hospital, Stellenbosch University, Cape Town, South Africa
| | - Nasreen Abrahams
- Perinatal Human Immunodeficiency Virus Research Unit, University of the Witwatersrand, Johannesburg, South Africa
| | - Hermien Gous
- Wits Reproductive Health and Human Immunodeficiency Virus Research Centre, Shandukani Clinic, Johannesburg, South Africa
| | - Avy Violari
- Perinatal Human Immunodeficiency Virus Research Unit, University of the Witwatersrand, Johannesburg, South Africa
| | - Mark F Cotton
- Family Centre for Research with UBUNTU, Department of Paediatrics and Child Health, Tygerberg Hospital, Stellenbosch University, Cape Town, South Africa
| | - Paul E Palumbo
- Hitchcock Medical School of Dartmouth University, New Lebanon, New Hampshire, USA
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Bell GJ, Agnandji ST, Asante KP, Ghansah A, Kamthunzi P, Emch M, Bailey JA. Impacts of Ecology, Parasite Antigenic Variation, and Human Genetics on RTS,S/AS01e Malaria Vaccine Efficacy. CURR EPIDEMIOL REP 2021; 8:79-88. [PMID: 34367877 PMCID: PMC8324449 DOI: 10.1007/s40471-021-00271-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/30/2021] [Indexed: 02/07/2023]
Abstract
PURPOSE OF REVIEW Global malaria elimination has little chance of success without an effective vaccine. The first malaria vaccine, RTS,S/AS01e, demonstrated moderate efficacy against clinical malaria in phase III trials and is undergoing large-scale effectiveness trials in Africa. Importantly, the vaccine did not perform equally well between phase III study sites. Though reasons for the moderate efficacy and this variation are unclear, various mechanisms have been suggested. This review summarizes the recent literature on such mechanisms, with a focus on those involving landscape ecology, parasite antigenic variation, and human host genetic differences. RECENT FINDINGS Transmission intensity may have a role pre- and post-vaccination in modulating immune responses to the vaccine. Furthermore, malaria incidence may "rebound" in vaccinated populations living in high transmission intensity settings. There is growing evidence that both genetic variation in the parasite circumsporozoite protein and variation of human host genetic factors affect RTS,S vaccine efficacy. These genetic factors may be interacting in complex ways to produce variation in the natural and vaccine-induced immune responses that protect against malaria. SUMMARY Due to the modest efficacy of RTS,S/AS01e, the combinations of factors (ecological, parasite, human host) impacting its effectiveness must be clearly understood, as this information will be critical for implementation policy and future vaccine designs.
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Affiliation(s)
- Griffin J. Bell
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC 27599 USA
| | - Selidji Todagbe Agnandji
- Centre de Recherches Médicales de Lambaréné, Lambaréné, Gabon ,Institute of Tropical Medicine, University of Tübingen, Tübingen, Germany
| | | | - Anita Ghansah
- Noguchi Memorial Institute for Medical Research, University of Ghana, Legon, Ghana
| | | | - Michael Emch
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC 27599 USA ,Department of Geography, University of North Carolina, Chapel Hill 220 E Cameron Ave, Chapel Hill, NC 27599 USA
| | - Jeffrey A. Bailey
- Department of Pathology and Laboratory Medicine, Brown University, 55 Claverick St, Rm 314B, Providence, RI 02912 USA
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11
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Bell GJ, Loop MS, Mvalo T, Juliano JJ, Mofolo I, Kamthunzi P, Tegha G, Lievens M, Bailey J, Emch M, Hoffman I. Environmental modifiers of RTS,S/AS01 malaria vaccine efficacy in Lilongwe, Malawi. BMC Public Health 2020; 20:910. [PMID: 32532234 PMCID: PMC7291743 DOI: 10.1186/s12889-020-09039-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 06/03/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND RTS,S/AS01 is the first vaccine against malaria to undergo pilot implementation, beginning in 2019 and vaccinating 360,000 children per year in Malawi, Ghana, and Kenya. The four-dose vaccine is given as a primary three-dose series with a fourth dose given approximately 18 months later. The efficacy of RTS,S/AS01 was variable among the 11 sites participating in the 2009-2014 phase III trial (MALARIA-055, NCT00866619), possibly due to differences in transmission intensity. However, a within-site examination of environmental factors related to transmission intensity and their impact on vaccine efficacy has yet to be conducted. METHODS We implemented the phase III RTS,S/AS01 trial at the Malawi site, which enrolled 1578 infants (6-12 weeks) and children (5-17 months) living in the Lilongwe District in Central Malawi and followed them for 3 years between 2009 and 2014. A global positioning system survey and an ecological questionnaire were conducted to collect participant household locations and characteristics, while additional data on background malaria prevalence were obtained from a concurrent Malaria Transmission Intensity (MTI) survey. Negative binomial regression models were used to assess whether the efficacy of the vaccine varied by estimated background malaria prevalence, household roof type, or amount of nearby vegetation. RESULTS Vaccine efficacy did not significantly vary by estimated malaria prevalence or by roof type. However, increased vegetation cover was associated with an increase in the efficacy of the three-dose primary RTS,S/AS01 series in the 18 months before the fourth dose and a decrease in the efficacy of the primary vaccine series in the second 18 months following, if the fourth dose was not given. Vegetation cover did not alter the efficacy of the fourth dose in a statistically or practically significant manner. CONCLUSIONS Vegetation coverage in this study site might be a proxy for nearness to rivers or branching, shallow wetlands called "dambos" which could serve as breeding sites for mosquitoes. We observed statistically significant modification of the efficacy of RTS,S/AS01 by forest cover, suggesting that initial vaccine efficacy and the importance of the fourth dose varies based on ecological context. TRIAL REGISTRATION Efficacy of GSK Biologicals' Candidate Malaria Vaccine (257049) Against Malaria Disease Caused by P. falciparum Infection in Infants and Children in Africa. NCT00866619 prospectively registered 20 March 2009.
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Affiliation(s)
- Griffin J. Bell
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC 27599 USA
| | - Matthew S. Loop
- Department of Biostatistics, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC 27599 USA
| | - Tisungane Mvalo
- University of North Carolina, Chapel Hill, NC 27599 USA
- University of North Carolina Project Malawi, Lilongwe, Malawi
| | - Jonathan J. Juliano
- Division of Infectious Diseases, School of Medicine, University of North Carolina, Chapel Hill, NC 27599 USA
| | - Innocent Mofolo
- University of North Carolina, Chapel Hill, NC 27599 USA
- University of North Carolina Project Malawi, Lilongwe, Malawi
| | - Portia Kamthunzi
- University of North Carolina, Chapel Hill, NC 27599 USA
- University of North Carolina Project Malawi, Lilongwe, Malawi
| | - Gerald Tegha
- University of North Carolina Project Malawi, Lilongwe, Malawi
| | | | - Jeffrey Bailey
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI 02912 USA
| | - Michael Emch
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC 27599 USA
| | - Irving Hoffman
- University of North Carolina, Chapel Hill, NC 27599 USA
- University of North Carolina Project Malawi, Lilongwe, Malawi
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12
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Bell GJ, Loop M, Topazian HM, Hudgens M, Mvalo T, Juliano JJ, Kamthunzi P, Tegha G, Mofolo I, Hoffman I, Bailey JA, Emch M. Case reduction and cost-effectiveness of the RTS,S/AS01 malaria vaccine alongside bed nets in Lilongwe, Malawi. Vaccine 2020; 38:4079-4087. [PMID: 32362527 DOI: 10.1016/j.vaccine.2020.04.031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 04/10/2020] [Accepted: 04/13/2020] [Indexed: 01/22/2023]
Abstract
BACKGROUND RTS,S/AS01, the most advanced vaccine against malaria, is now undergoing pilot implementation in Malawi, Ghana, and Kenya where an estimated 360,000 children will be vaccinated each year. In this study we evaluate RTS,S/AS01 alongside bed net use and estimate cost-effectiveness. METHODS RTS,S/AS01 phase III trial and bed net prevalence data were used to determine the effect of vaccination in the urban/periurban and rural areas of Lilongwe, Malawi. Cost data were used to calculate the cost-effectiveness of various interventions over three years. FINDINGS Since bed nets reduce malaria incidence and homogeneous vaccine efficacy was assumed, participants without bed nets received greater relative benefit from vaccination with RTS,S/AS01 than participants with bed nets. Similarly, since malaria incidence in rural Lilongwe is higher than in urban Lilongwe, the impact and cost-effectiveness of vaccine interventions is increased in rural areas. In rural Lilongwe, we estimated that vaccinating one child without a bed net would prevent 2·59 (1·62 to 3·38) cases of malaria over three years, corresponding to a cost of $10·08 (7·71 to 16·13) per case averted. Alternatively, vaccinating one child with a bed net would prevent 1·59 (0·87 to 2·57) cases, corresponding to $16·43 (10·16 to 30·06) per case averted. Providing RTS,S/AS01 to 30,000 children in rural Lilongwe was estimated to cost $782,400 and to prevent 58,611 (35,778 to 82,932) cases of malaria over a three-year period. Joint interventions providing both vaccination and bed nets (to those without them) were estimated to prevent additional cases of malaria and to be similarly cost-effective, compared to vaccine-only interventions. INTERPRETATION To maximize malaria prevention, vaccination and bed net distribution programs could be integrated. FUNDING Impacts of Environment, Host Genetics and Antigen Diversity on Malaria Vaccine Efficacy (1R01AI137410-01).
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Affiliation(s)
- Griffin J Bell
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC 27599, USA.
| | - Matthew Loop
- Department of Biostatistics, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC 27599, USA.
| | - Hillary M Topazian
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC 27599, USA.
| | - Michael Hudgens
- Department of Biostatistics, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC 27599, USA.
| | - Tisungane Mvalo
- University of North Carolina, Chapel Hill, NC 27599, USA; University of North Carolina Project, Lilongwe, Malawi.
| | - Jonathan J Juliano
- Division of Infectious Diseases, School of Medicine, University of North Carolina, Chapel Hill, NC 27599, USA.
| | - Portia Kamthunzi
- University of North Carolina, Chapel Hill, NC 27599, USA; University of North Carolina Project, Lilongwe, Malawi.
| | - Gerald Tegha
- University of North Carolina Project, Lilongwe, Malawi.
| | - Innocent Mofolo
- University of North Carolina, Chapel Hill, NC 27599, USA; University of North Carolina Project, Lilongwe, Malawi.
| | - Irving Hoffman
- University of North Carolina, Chapel Hill, NC 27599, USA; University of North Carolina Project, Lilongwe, Malawi.
| | - Jeffrey A Bailey
- Department of Pathology and Laboratory Medicine, Brown University, Providence, RI 02903, USA
| | - Michael Emch
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC 27599, USA.
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13
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Mvalo T, Topazian HM, Kamthunzi P, Chen JS, Kambalame I, Mafunga P, Mumba N, Chiume M, Paseli K, Tegha G, Kumwenda W, Heimlich JB, Ellis G, Key N, Gopal S, Hoffman I, Ataga KI, Westmoreland KD. Real-world experience using hydroxyurea in children with sickle cell disease in Lilongwe, Malawi. Pediatr Blood Cancer 2019; 66:e27954. [PMID: 31397075 PMCID: PMC6754288 DOI: 10.1002/pbc.27954] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Revised: 07/04/2019] [Accepted: 07/20/2019] [Indexed: 12/21/2022]
Abstract
INTRODUCTION Sickle cell disease (SCD) is among the most common inherited hematologic diseases in sub-Saharan Africa (SSA). Historically, hydroxyurea administration in SSA has been restricted due to limited region-specific evidence for safety and efficacy. METHODS We conducted a prospective observational cohort study of pediatric patients with SCD in Malawi. From January 2015 to November 2017, hydroxyurea at doses of 10-20 mg/kg/day was administered to children with clinically severe disease (targeted use policy). From December 2017 to July 2018, hydroxyurea was prescribed to all patients (universal use policy). RESULTS Of 187 patients with SCD, seven (3.7%) died and 23 (12.3%) were lost to follow-up. The majority (135, 72.2%) were prescribed hydroxyurea, 59 (43.7%) under the targeted use policy and 76 (56.3%) under the universal use policy. There were no documented severe toxicities. Under the targeted use policy, children with SCD demonstrated absolute decreases in the rates of hospitalization (-4.1 per 1000 person-days; -7.2, -1.0; P = .004), fevers (-4.2 per 1000 person-days; -7.2, -1.1; P = .002), transfusions (-2.3 per 1000 person-days; 95% confidence interval: -4.9, 0.3; P = .06), and annual school absenteeism (-51.2 per person-year; -60.1, -42.3; P < .0001) within 6 months of hydroxyurea commencement. CONCLUSION We successfully implemented universal administration of hydroxyurea to children with SCD at a tertiary hospital in Malawi. Similar to recently reported trials, hydroxyurea was safe and effective during routine programmatic experience, with clinical benefits particularly among high-risk children. This highlights the importance of continued widespread scale-up of hydroxyurea within SCD programs across SSA.
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Affiliation(s)
- Tisungane Mvalo
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi,Department of Pediatrics, UNC, Chapel Hill, NC, USA
| | - Hillary M. Topazian
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi,Department of Epidemiology, UNC, Chapel Hill. NC, USA
| | - Portia Kamthunzi
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi,Institute for Global Health and Infectious Diseases, UNC, Chapel Hill, NC, USA
| | - Jane S. Chen
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi,Department of Epidemiology, UNC, Chapel Hill. NC, USA
| | - Isobel Kambalame
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi
| | - Pilirani Mafunga
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi
| | - Noel Mumba
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi
| | - Msandeni Chiume
- Department of Pediatrics, Kamuzu Central Hospital (KCH), Ministry of Health, Lilongwe, Malawi
| | - Khadija Paseli
- Department of Pediatrics, Kamuzu Central Hospital (KCH), Ministry of Health, Lilongwe, Malawi
| | - Gerald Tegha
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi
| | - Wiza Kumwenda
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi
| | | | - Graham Ellis
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi
| | - Nigel Key
- Division of Hematology-Oncology, UNC, Chapel Hill, NC, USA
| | - Satish Gopal
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi,Department of Epidemiology, UNC, Chapel Hill. NC, USA,Institute for Global Health and Infectious Diseases, UNC, Chapel Hill, NC, USA,Division of Hematology-Oncology, UNC, Chapel Hill, NC, USA
| | - Irving Hoffman
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi,Institute for Global Health and Infectious Diseases, UNC, Chapel Hill, NC, USA
| | - Kenneth I. Ataga
- Center for Sickle Cell Disease, University of Tennessee Health Science Center at Memphis, TN, USA
| | - Kate D. Westmoreland
- University of North Carolina (UNC) Project-Malawi, Lilongwe, Malawi,Division of Pediatric Hematology-Oncology, UNC, Chapel Hill, NC, USA
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Familiar I, Chernoff M, Ruisenor-Escudero H, Laughton B, Joyce C, Fairlie L, Vhembo T, Kamthunzi P, Barlow-Barlow L, Zimmer B, McCarthy K, Boivin MJ. Association between caregiver depression symptoms and child executive functioning. Results from an observational study carried out in four sub-Saharan countries. AIDS Care 2019; 32:486-494. [PMID: 31462095 DOI: 10.1080/09540121.2019.1659917] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Depressive symptoms among HIV-positive (HIV+) women may negatively impact their health and possibly that of their young children through risk of compromised caregiving. We evaluated how depression symptoms in predominantly (97%) female caregivers relate to neurodevelopmental outcomes in their HIV affected children. Data come from the IMPAACT P1104s Study, an observational cohort across six sites in four countries: Zimbabwe, South Africa, Uganda and Malawi. Participants (n = 611) were 5-11-year-old children with HIV (HIV), HIV exposed uninfected (HEU), or HIV unexposed uninfected (HUU). Primary caregivers were assessed for depression with the Hopkins Symptom Checklist (HSCL) and children with Behavior Rating Inventory for Executive Function (BRIEF) parent-report, Kauffman Assessment Battery for Children II (KABC), Bruininks-Oseretsky Test of Motor Proficiency 2nd Ed. (BOT-2), Test of Variables of Attention (TOVA), Multiple Indicators Cluster Survey, Child Disability and Development scales (MICS-4). Caregivers with higher depression scores (>1.75 mean HSCL score) reported more executive function problems in their children, regardless of HIV status. All executive function scores were significantly (p < 0.001) associated with depressive symptomatology at baseline and across time. Caregiver depressive symptomatology was not associated with other assessed neurocognitive outcomes. These results highlight the potential impact of caregiver depression on child behavioral outcomes.
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Affiliation(s)
- Itziar Familiar
- Department of Psychiatry, Michigan State University, East Lansing, MI, USA
| | - Miriam Chernoff
- Center for Biostatistics in AIDS Research, Harvard University, Boston, MA, USA
| | | | - Barbara Laughton
- Department of Pediatrics and Child Health, Stellenboch University, Tygerberg, RSA
| | - Celeste Joyce
- Perinatal HIV Research Unit (PHRU), Chris Hani Baragwanath Hospital, Johannesburg, RSA
| | - Lee Fairlie
- Wits Reproductive Health and HIV Institute, Shandukani Clinic, Johannesburg, RSA
| | - Tichaona Vhembo
- Harare Family Care CRS, University of Zimbabwe, Harare, Zimbabwe
| | - Portia Kamthunzi
- University of North Carolina-Lilongwe Clinical Research Institute, Lilongwe, Malawi
| | - Linda Barlow-Barlow
- Makerere University-Johns Hopkins University Research Collaboration, Kampala, Uganda
| | | | | | - Michael J Boivin
- Departments of Psychiatry and Neurology, Michigan State University, East Lansing, MI, USA
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Ruiseñor-Escudero H, Familiar I, Nyakato M, Kutessa A, Namukooli J, Ssesanga T, Joyce C, Laughton B, Grab J, Chernoff M, Vhembo T, Fairlie L, Kamthunzi P, Boivin M. Building capacity in neurodevelopment assessment of children in sub-Saharan Africa: A quality assurance model to implement standardized neurodevelopment testing. Child Neuropsychol 2019; 25:466-481. [PMID: 30105934 PMCID: PMC6375801 DOI: 10.1080/09297049.2018.1497588] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 06/10/2018] [Indexed: 10/28/2022]
Abstract
Compromised neurodevelopment (ND) among infants and children is prevalent in sub-Saharan Africa. Standardized testing of ND is frequently prohibitive in these contexts, as tests require skilled staff for their application. In this paper, we present a quality assurance (QA) model (QualiND) for standardized ND testing, discussing findings and implications from our experience applying the Kaufman Assessment Battery for Children second edition (KABC-II). The QualiND model was implemented within IMPAACT P1104s study, a multisite, prospective study including 615 children affected by HIV. From 2014 to 2016, the QualiND managed 18 testers across 6 sites located in 4 African countries applying the KABC-II in 9 local languages. The QualiND is a multilevel, video-assisted iterative model incorporating remote evaluation, feedback, and supervision roles. Using an ad hoc rubric, videos of test application were evaluated by experienced staff in a centralized QA center. At each study site, testers and supervisors reviewed feedback from videos received via email from the QA center and devised an action plan to address testing errors and deficiencies. There were few instances of invalid tests and few barriers to test completion. Over 97% of KABC-II tests across sites were considered to be valid by the QA center. Overall, the QualiND model was a useful platform for remote supervision to nonspecialist and minimally trained research staff. The QualiND model may be useful to researchers and organizations involved in measuring early child development using standardized tests in low and middle-income countries.
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Affiliation(s)
| | - Itziar Familiar
- a Psychiatry Department , Michigan State University , East Lansing , USA
| | - Mary Nyakato
- b Makerere University-Johns Hopkins University Research Collaboration (MU-JHU) , Kampala , Uganda
| | - Agatha Kutessa
- b Makerere University-Johns Hopkins University Research Collaboration (MU-JHU) , Kampala , Uganda
| | | | | | - Celeste Joyce
- d Chris Hani HIV Unit , University of Witwatersrand , Soweto , South Africa
| | - Barbara Laughton
- e Department of Pediatrics and Child Health , Tygerberg University , Tygerberg , South Africa
| | - Janet Grab
- f Wits Reproductive Health & HIV Institute , Shandukani Clinic , Johannesburg , South Africa
| | - Miriam Chernoff
- g Center for Biostatistics in AIDS Research, Harvard T.H. Chan School of Public Health , Harvard University , Boston , USA
| | - Tichaona Vhembo
- h Harare Family Care , University of Zimbabwe , Harare , Zimbabwe
| | - Lee Fairlie
- f Wits Reproductive Health & HIV Institute , Shandukani Clinic , Johannesburg , South Africa
| | - Portia Kamthunzi
- i Lilongwe Clinical Research Institute , Kamuzu Central Hospital , Lilongwe , Malawi
| | - Michael Boivin
- a Psychiatry Department , Michigan State University , East Lansing , USA
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16
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Guerra Mendoza Y, Garric E, Leach A, Lievens M, Ofori-Anyinam O, Pirçon JY, Stegmann JU, Vandoolaeghe P, Otieno L, Otieno W, Owusu-Agyei S, Sacarlal J, Masoud NS, Sorgho H, Tanner M, Tinto H, Valea I, Mtoro AT, Njuguna P, Oneko M, Otieno GA, Otieno K, Gesase S, Hamel MJ, Hoffman I, Kaali S, Kamthunzi P, Kremsner P, Lanaspa M, Lell B, Lusingu J, Malabeja A, Aide P, Akoo P, Ansong D, Asante KP, Berkley JA, Adjei S, Agbenyega T, Agnandji ST, Schuerman L. Safety profile of the RTS,S/AS01 malaria vaccine in infants and children: additional data from a phase III randomized controlled trial in sub-Saharan Africa. Hum Vaccin Immunother 2019; 15:2386-2398. [PMID: 31012786 PMCID: PMC6816384 DOI: 10.1080/21645515.2019.1586040] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A phase III, double-blind, randomized, controlled trial (NCT00866619) in sub-Saharan Africa showed RTS,S/AS01 vaccine efficacy against malaria. We now present in-depth safety results from this study. 8922 children (enrolled at 5–17 months) and 6537 infants (enrolled at 6–12 weeks) were 1:1:1-randomized to receive 4 doses of RTS,S/AS01 (R3R) or non-malaria control vaccine (C3C), or 3 RTS,S/AS01 doses plus control (R3C). Aggregate safety data were reviewed by a multi-functional team. Severe malaria with Blantyre Coma Score ≤2 (cerebral malaria [CM]) and gender-specific mortality were assessed post-hoc. Serious adverse event (SAE) and fatal SAE incidences throughout the study were 24.2%–28.4% and 1.5%–2.5%, respectively across groups; 0.0%–0.3% of participants reported vaccination-related SAEs. The incidence of febrile convulsions in children was higher during the first 2–3 days post-vaccination with RTS,S/AS01 than with control vaccine, consistent with the time window of post-vaccination febrile reactions in this study (mostly the day after vaccination). A statistically significant numerical imbalance was observed for meningitis cases in children (R3R: 11, R3C: 10, C3C: 1) but not in infants. CM cases were more frequent in RTS,S/AS01-vaccinated children (R3R: 19, R3C: 24, C3C: 10) but not in infants. All-cause mortality was higher in RTS,S/AS01-vaccinated versus control girls (2.4% vs 1.3%, all ages) in our setting with low overall mortality. The observed meningitis and CM signals are considered likely chance findings, that – given their severity – warrant further evaluation in phase IV studies and WHO-led pilot implementation programs to establish the RTS,S/AS01 benefit-risk profile in real-life settings.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | - Seth Owusu-Agyei
- Kintampo Health Research Center , Kintampo , Ghana.,Diseases Control Department, London School of Hygiene and Tropical Medicine , London , UK
| | - Jahit Sacarlal
- Centro de Investigação em Saúde de Manhiça , Manhiça , Mozambique.,Faculdade de Medicina, Universidade Eduardo Mondlane (UEM) , Maputo , Mozambique
| | - Nahya Salim Masoud
- Muhimbili University of Health and Allied Sciences (MUHAS), Dar es Salaam and Ifakara Health Institute , Bagamoyo , Tanzania
| | - Hermann Sorgho
- Institut de Recherche en Science de la Santé , Nanoro , Burkina Faso
| | - Marcel Tanner
- Muhimbili University of Health and Allied Sciences (MUHAS), Dar es Salaam and Ifakara Health Institute , Bagamoyo , Tanzania.,Swiss Tropical and Public Health Institute , Basel , Switzerland.,Epidemiology and Medical Parasitology department, University of Basel , Basel , Switzerland
| | - Halidou Tinto
- Institut de Recherche en Science de la Santé , Nanoro , Burkina Faso
| | - Innocent Valea
- Institut de Recherche en Science de la Santé , Nanoro , Burkina Faso
| | - Ali Takadir Mtoro
- Muhimbili University of Health and Allied Sciences (MUHAS), Dar es Salaam and Ifakara Health Institute , Bagamoyo , Tanzania
| | - Patricia Njuguna
- Kenya Medical Research Institute-Wellcome Trust Research Programme, Centre for Geographic Medicine Research , Kilifi , Kenya.,Pwani University , Kilifi , Kenya.,University of Oxford , Oxford , UK
| | - Martina Oneko
- Kenya Medical Research Institute, Centre for Global Health Research , Kisumu , Kenya
| | | | - Kephas Otieno
- Kenya Medical Research Institute, Centre for Global Health Research , Kisumu , Kenya
| | - Samwel Gesase
- National Institute for Medical Research , Korogwe , Tanzania
| | - Mary J Hamel
- Division of Parasitic Diseases and Malaria, Center for Global Health, Centers for Disease Control and Prevention , Atlanta , GA , USA
| | - Irving Hoffman
- University of North Carolina Project , Lilongwe , Malawi
| | - Seyram Kaali
- Kintampo Health Research Center , Kintampo , Ghana
| | | | - Peter Kremsner
- Centre de Recherches Médicales de Lambaréné, Lambaréné, Gabon and Institute of Tropical Medicine, University of Tübingen , Tübingen , Germany
| | - Miguel Lanaspa
- Centro de Investigação em Saúde de Manhiça , Manhiça , Mozambique.,Barcelona Institute for Global Health (ISGlobal), Hospital Clínic-Universitat de Barcelona , Barcelona , Spain
| | - Bertrand Lell
- Centre de Recherches Médicales de Lambaréné, Lambaréné, Gabon and Institute of Tropical Medicine, University of Tübingen , Tübingen , Germany
| | - John Lusingu
- National Institute for Medical Research , Korogwe , Tanzania
| | | | - Pedro Aide
- Centro de Investigação em Saúde de Manhiça , Manhiça , Mozambique.,National Institute of Health, Ministry of Health , Maputo , Mozambique
| | - Pauline Akoo
- Kenya Medical Research Institute-Wellcome Trust Research Programme, Centre for Geographic Medicine Research , Kilifi , Kenya
| | - Daniel Ansong
- Kwame Nkrumah University of Science and Technology , Kumasi , Ghana
| | | | - James A Berkley
- Kenya Medical Research Institute-Wellcome Trust Research Programme, Centre for Geographic Medicine Research , Kilifi , Kenya.,University of Oxford , Oxford , UK
| | - Samuel Adjei
- Kwame Nkrumah University of Science and Technology , Kumasi , Ghana
| | - Tsiri Agbenyega
- Kwame Nkrumah University of Science and Technology , Kumasi , Ghana
| | - Selidji Todagbe Agnandji
- Centre de Recherches Médicales de Lambaréné, Lambaréné, Gabon and Institute of Tropical Medicine, University of Tübingen , Tübingen , Germany
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17
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Hobbs CV, Gabriel EE, Kamthunzi P, Tegha G, Tauzie J, Li Y, Ilmet T, Artimovich E, Neal J, Hall T, Parikh S, Kirmse B, Jean-Philippe P, Chen J, Prescott WR, Palumbo P, Duffy PE, Borkowsky W, For The P S Study Team. Prevalence of Asymptomatic Parasitemia and Gametocytemia in HIV-Infected Children on Differing Antiretroviral Therapy. Am J Trop Med Hyg 2018; 98:67-70. [PMID: 29165225 PMCID: PMC5928720 DOI: 10.4269/ajtmh.17-0462] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Laboratory data and prior pediatric reports indicate that HIV protease inhibitor (PI)–based antiretroviral therapy (ARV) kills gametocytes and reduces rates of gametocytemia, but not asymptomatic parasitemia, in a high malaria-transmission area. To determine whether ARV regimen impacts these rates in areas with less-intense malaria transmission, we compared asymptomatic parasitemia and gametocytemia rates in HIV-infected children by ARV regimen in Lilongwe, Malawi, an area of low-to-moderate transmission intensity. HIV PI lopinavir–ritonavir (LPV–rtv) ARV– or non-nucleoside reverse transcriptase inhibitor nevirapine ARV–treated children did not differ in the rates of polymerase chain reaction-detected asymptomatic parasitemia (relative risk [RR] 0.43 95% confidence interval [CI] [0.16, 1.18], P value 0.10) or microscopically detected gametocytemia with LPV–rtv ARV during symptomatic malaria (RR 0.48 95% CI [0.22,1.04] P value 0.06). LPV–rtv ARV was not associated with reduced rates of asymptomatic parasitemia, or gametocytemia on days of symptomatic malaria episodes, in HIV-infected children. Larger studies should evaluate whether ARV impacts transmission.
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Affiliation(s)
- Charlotte V Hobbs
- Laboratory of Malaria Immunology and Vaccinology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland.,Batson Children's Hospital, Department of Pediatrics (Division of Infectious Diseases) and Department of Microbiology, University of Mississippi Medical Center, Jackson, Mississippi.,Department of Pediatrics, Division of Infectious Disease and Immunology, New York University School of Medicine, New York, New York
| | - Erin E Gabriel
- Biostatistics Research Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland
| | - Portia Kamthunzi
- Kamuzu Central Hospital, University of North Carolina at Chapel Hill Lilongwe Project, Lilongwe, Malawi
| | - Gerald Tegha
- Kamuzu Central Hospital, University of North Carolina at Chapel Hill Lilongwe Project, Lilongwe, Malawi
| | - Jean Tauzie
- Kamuzu Central Hospital, University of North Carolina at Chapel Hill Lilongwe Project, Lilongwe, Malawi
| | - Yonghua Li
- Department of Pediatrics, Division of Infectious Disease and Immunology, New York University School of Medicine, New York, New York
| | - Tiina Ilmet
- Cornell Clinical Trials Unit, Weill Cornell Medicine, New York, New York.,Department of Pediatrics, Division of Infectious Disease and Immunology, New York University School of Medicine, New York, New York
| | - Elena Artimovich
- University of Maryland, Division of Malaria Research, Institute for Global Health, University of Maryland School of Medicine, Baltimore, Maryland
| | - Jillian Neal
- Laboratory of Malaria Immunology and Vaccinology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland
| | - Ted Hall
- HYDAS World Health, Inc., Hummelstown, Pennsylvania
| | - Sunil Parikh
- Yale Schools of Public Health and Medicine, New Haven, Connecticut
| | - Brian Kirmse
- Department of Pediatrics, Division of Medical Genetics, University of Mississippi Medical Center, Batson Children's Hospital, Jackson, Mississippi
| | - Patrick Jean-Philippe
- HJF-DAIDS, Division of the Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Contractor to NIAID, NIH, DHHS, Bethesda, Maryland
| | - Jingyang Chen
- Ben Towne Center for Childhood Cancer Research, Seattle Children's Research Institute, University of Washington, and Fred Hutchinson Cancer Research Center, Seattle, Washington.,Laboratory of Malaria Immunology and Vaccinology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland
| | | | - Paul Palumbo
- Division of Infectious Diseases and International Health, Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire
| | - Patrick E Duffy
- Laboratory of Malaria Immunology and Vaccinology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland
| | - William Borkowsky
- Department of Pediatrics, Division of Infectious Disease and Immunology, New York University School of Medicine, New York, New York
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18
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Heimlich JB, Chipoka G, Elsherif L, David E, Ellis G, Kamthunzi P, Krysiak R, Mafunga P, Zhou Q, Cai J, Gopal S, Key NS, Ataga KI. Nephrin as a biomarker of sickle cell glomerulopathy in Malawi. Pediatr Blood Cancer 2018; 65:e26993. [PMID: 29411937 PMCID: PMC5911184 DOI: 10.1002/pbc.26993] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Revised: 12/03/2017] [Accepted: 12/22/2017] [Indexed: 12/18/2022]
Abstract
BACKGROUND Glomerulopathy is an increasingly identified complication in young patients with sickle cell disease (SCD). Hyperfiltration and albuminuria followed by declining glomerular filtration rates and eventual end-stage renal disease (ESRD) is assumed to be the typical progression of glomerular disease. There are only a few reported biomarkers to identify early-stage renal disease in SCD. PROCEDURES We detail the renal profile of 101 children with SCD in Malawi and propose a novel urinary biomarker for the identification of early renal disease. RESULTS Among children with sickle cell anemia, 24.8% had a urine albumin-creatinine ratio of 30 mg/g or above. In univariate analysis, only patients with higher urinary nephrin, a urinary marker of glomerular injury, had significantly greater odds of having albuminuria. In multivariable analysis, nephrin remained significantly associated with albuminuria. A nephrin-creatinine ratio (NCR) cut-point of 622 ng/mg, the 50th percentile, was associated with a 45.8 times greater odds of having albuminuria in children with nephrinuria above this value. Further analysis revealed this urinary NCR cut-point to have 96% sensitivity, 64% specificity, 47% positive predictive value, and 98% negative predictive value for the presence of albuminuria. CONCLUSIONS These data suggest that a substantial number of children with SCD in Malawi have renal disease and could be at risk for worsening nephropathy and ESRD as they age. Our data suggest that urinary nephrin could be utilized as an early marker of glomerular disease in SCD.
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Affiliation(s)
- J. Brett Heimlich
- UNC Project-Malawi, Lilongwe, Malawi,Vanderbilt University Medical Center, Nashville, Tennessee
| | | | - Laila Elsherif
- University of North Carolina, Chapel Hill, North Carolina
| | - Emeraghi David
- University of North Carolina, Chapel Hill, North Carolina
| | - Graham Ellis
- UNC Project-Malawi, Lilongwe, Malawi,Naval Medical Center San Diego, San Diego, CA
| | | | | | | | - Qingning Zhou
- University of North Carolina, Charlotte, North Carolina
| | - Jianwen Cai
- University of North Carolina, Chapel Hill, North Carolina
| | - Satish Gopal
- UNC Project-Malawi, Lilongwe, Malawi,University of North Carolina, Chapel Hill, North Carolina
| | - Nigel S. Key
- University of North Carolina, Chapel Hill, North Carolina
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19
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Chernoff MC, Laughton B, Ratswana M, Familiar I, Fairlie L, Vhembo T, Kamthunzi P, Kabugho E, Joyce C, Zimmer B, Ariansen JL, Jean-Philippe P, Boivin MJ. Validity of Neuropsychological Testing in Young African Children Affected by HIV. J PEDIAT INF DIS-GER 2018; 13:185-201. [PMID: 30100780 DOI: 10.1055/s-0038-1637020] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Introduction Western-constructed neuropsychological tests have been used in low and middle income countries to assess the impact of HIV/AIDS and other chronic illnesses. We explore using such instruments cross-culturally in a sub-Saharan Africa setting. Methods IMPAACT P1104S was a two-year observational study carried out at six clinical sites (South Africa- 3 sites, Malawi, Uganda and Zimbabwe) to assess and compare neuropsychological outcomes in three cohorts of children 5-11 years of age: HIV-infected (HIV), HIV-exposed but uninfected (HEU) and HIV unexposed and uninfected (HU). Descriptive statistics compared socio-demographic characteristics among children at sites. Instruments included the KABC-II cognitive ability, TOVA attention/impulsivity, BOT-2 motor proficiency tests, and BRIEF executive function problems. Test characteristics were assessed using intraclass and Spearman non-parametric correlations, linear regression and principal factor analyses. Results Of the 611 participants, 50% were male and mean age ranged from 6.6 to 8 years. In Malawi, Uganda and Zimbabwe, substantial proportions of families lived in rural settings in contrast to the South African sites. Intraclass correlation coefficients between weeks 0 and 48 were highest for the KABC scores, ranging between 0.42 to 0.71.Correlations among similar test domains were low to moderate but significant, with positive correlation between KABC Sequential and TOVA scores and negative correlation between BRIEF and KABC scores. TOVA response time scores correlated negatively with the BOT-2 Total points score. Strong and significant associations between individual measures of growth, disability and development with all test scores were observed. Performance-based measures were markedly lower for HIV compared to HEU and HU participants, even after controlling for age, sex and site. Factor analyses confirmed the underlying theoretical structure of the KABC scaled item scores. Conclusion The KABC, TOVA, BRIEF and BOT-2 were valid and reliable tools for assessing the neuropsychological impact of HIV in four sub-Saharan African countries.
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Affiliation(s)
- Miriam C Chernoff
- Center for Biostatistics in AIDS Research, Harvard T.H. Chan School of Public Health, Boston, MA
| | - Barbara Laughton
- Family Clinical Research Unit, Tygerberg Hospital, Department of Paediatrics and Child Health, Stellenbosch University, Tygerberg, RSA
| | - Mmule Ratswana
- Wits Reproductive Health & HIV Institute (WRHI), Shandukani Clinic, Johannesburg, RSA
| | - Itziar Familiar
- Department of Psychiatry, Michigan State University, East Lansing, MI
| | - Lee Fairlie
- Wits Reproductive Health & HIV Institute (WRHI), Shandukani Clinic, Johannesburg, RSA
| | - Tichaona Vhembo
- Harare Family Care CRS, University of Zimbabwe, College of Health Sciences Clinical Trials Unit, Harare, Zimbabwe
| | - Portia Kamthunzi
- University of North Carolina Project- Lilongwe, Malawi CRS, Malawi
| | - Enid Kabugho
- Makerere University-Johns Hopkins University Research Collaboration (MUJHU CARE LTD) CRS, Kampala, Uganda
| | - Celeste Joyce
- Perinatal HIV Research Unit, Faculty of Health Sciences, University of Witwatersrand, South Africa
| | | | - J L Ariansen
- Clinical Research Management, FHI360, Durham, NC
| | | | - Michael J Boivin
- Department of Psychiatry, Michigan State University, East Lansing, MI.,Department of Neurology and Ophthalmology, Michigan State University, East Lansing, MI.,Department of Psychiatry, the University of Michigan, Ann Arbor, MI
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20
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Huang L, Carey V, Lindsey JC, Marzan F, Gingrich D, Graham B, Barlow-Mosha L, Ssemambo PK, Kamthunzi P, Nachman S, Parikh S, Aweeka FT. Concomitant nevirapine impacts pharmacokinetic exposure to the antimalarial artemether-lumefantrine in African children. PLoS One 2017; 12:e0186589. [PMID: 29065172 PMCID: PMC5655345 DOI: 10.1371/journal.pone.0186589] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Accepted: 10/04/2017] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The antiretroviral drug nevirapine and the antimalarial artemisinin-based combination therapy artemether-lumefantrine are commonly co-administered to treat malaria in the context of HIV. Nevirapine is a known inhibitor of cytochrome P450 3A4, which metabolizes artemether and lumefantrine. To address the concern that the antiretroviral nevirapine impacts the antimalarial artemether-lumefantrine pharmacokinetics, a prospective non-randomized controlled study in children presenting with uncomplicated malaria and HIV in sub-Saharan Africa was carried out. METHODS Participants received artemether-lumefantrine (20/120 mg weight-based BID) for 3 days during nevirapine-based antiretroviral therapy (ART) co-administration (158-266 mg/m2 QD). HIV positive participants who were not yet on ART drugs were also enrolled as the control group. The target enrollment was children aged 3-12 years (n = 24 in each group). Intensive pharmacokinetics after the last artemether-lumefantrine dose was assessed for artemether, its active metabolite dihydroartemisinin, and lumefantrine. Pharmacokinetic parameters (area under the plasma concentration vs. time curve (AUC), maximum concentration and day 7 lumefantrine concentrations) were estimated using non-compartmental methods and compared to controls. RESULTS Nineteen children (16 on nevirapine and three not on ART) enrolled. Fifteen of the 16 (aged 4 to 11 years) on nevirapine-based ART were included in the pharmacokinetic analysis. Due to evolving WHO HIV treatment guidelines, insufficient children were enrolled in the control group (n = 3), so the pharmacokinetic data were compared to a historical control group of 20 HIV-uninfected children 5-12 years of age who also presented with malaria and underwent identical study procedures. Decreases of pharmacokinetic exposure [as estimated by AUC (AUC0-8hr)] were marginally significant for artemether (by -46%, p = 0.08) and dihydroartemisinin (-22%, p = 0.06) in the children on nevirapine-based ART, compared to when artemether-lumefantrine was administered alone. Similarly, peak concentration was decreased by 50% (p = 0.07) for artemether and 36% (p = 0.01) for dihydroartemisinin. In contrast, exposure to lumefantrine increased significantly in the context of nevirapine [AUC0-120hr:123% (p<0.001); Cday7:116% (p<0.001), Cmax: 95% (p<0.001)]. CONCLUSIONS Nevirapine-based ART increases the exposure to lumefantrine in pre-pubescent children with a trend toward diminished artemether and dihydroartemisinin exposure. These findings contrast with other studies indicating NVP reduces or results in no change in exposure of antimalarial drugs, and may be specific to this age group (4-12 years). Considering the excellent safety profile of artemether-lumefantrine, the increase in lumefantrine is not of concern. However, the reduction in artemisinin exposure may warrant further study, and suggests that dosage adjustment of artemether-lumefantrine with nevirapine-based ART in children is likely warranted.
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Affiliation(s)
- Liusheng Huang
- Drug Research Unit, Department of Clinical Pharmacy, University of California, San Francisco, CA, United States of America
| | - Vincent Carey
- Center for Biostatistics in AIDS Research, Harvard TH Chan School of Public Health, Boston, MA, United States of America
| | - Jane C. Lindsey
- Center for Biostatistics in AIDS Research, Harvard TH Chan School of Public Health, Boston, MA, United States of America
| | - Florence Marzan
- Drug Research Unit, Department of Clinical Pharmacy, University of California, San Francisco, CA, United States of America
| | - David Gingrich
- Drug Research Unit, Department of Clinical Pharmacy, University of California, San Francisco, CA, United States of America
| | - Bobbie Graham
- Frontier Science and Technology Research Foundation, Buffalo, NY, United States of America
| | | | | | | | - Sharon Nachman
- School of Medicine, Stony Brook University, Stony Brook, NY, United States of America
| | - Sunil Parikh
- Yale School of Public Health, New Haven, CT, United States of America
| | - Francesca T. Aweeka
- Drug Research Unit, Department of Clinical Pharmacy, University of California, San Francisco, CA, United States of America
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21
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Hobbs CV, Gabriel EE, Kamthunzi P, Tegha G, Tauzie J, Petzold E, Barlow-Mosha L, Chi BH, Li Y, Ilmet T, Kirmse B, Neal J, Parikh S, Deygoo N, Jean Philippe P, Mofenson L, Prescott W, Chen J, Musoke P, Palumbo P, Duffy PE, Borkowsky W. Malaria in HIV-Infected Children Receiving HIV Protease-Inhibitor- Compared with Non-Nucleoside Reverse Transcriptase Inhibitor-Based Antiretroviral Therapy, IMPAACT P1068s, Substudy to P1060. PLoS One 2016; 11:e0165140. [PMID: 27936233 PMCID: PMC5147802 DOI: 10.1371/journal.pone.0165140] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Accepted: 10/05/2016] [Indexed: 11/21/2022] Open
Abstract
Background HIV and malaria geographically overlap. HIV protease inhibitors kill malaria parasites in vitro and in vivo, but further evaluation in clinical studies is needed. Methods Thirty-one children from Malawi aged 4–62 months were followed every 3 months and at intercurrent illness visits for ≤47 months (September 2009-December 2011). We compared malaria parasite carriage by blood smear microscopy (BS) and confirmed clinical malaria incidence (CCM, or positive BS with malaria symptoms) in children initiated on HIV antiretroviral therapy (ART) with zidovudine, lamivudine, and either nevirapine (NVP), a non-nucleoside reverse transcriptase inhibitor, or lopinavir-ritonavir (LPV-rtv), a protease inhibitor. Results We found an association between increased time to recurrent positive BS, but not CCM, when anti-malarial treatment and LPV-rtv based ART were used concurrently and when accounting for a LPV-rtv and antimalarial treatment interaction (adjusted HR 0.39; 95% CI (0.17,0.89); p = 0.03). Conclusions LPV-rtv in combination with malaria treatment was associated with lower risk of recurrent positive BS, but not CCM, in HIV-infected children. Larger, randomized studies are needed to confirm these findings which may permit ART optimization for malaria-endemic settings. Trial Registration ClinicalTrials.gov NCT00719602
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Affiliation(s)
- Charlotte V. Hobbs
- Laboratory of Malaria Immunology and Vaccinology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, United States of America
- Department of Pediatrics, Division of Infectious Disease and Immunology, New York University School of Medicine, NY, United States of America
- Batson Children’s Hospital, Department of Pediatrics (Division of Infectious Diseases) and Department of Microbiology, University of Mississippi Medical Center, Jackson, MS, United States of America
- * E-mail:
| | - Erin E. Gabriel
- Biostatistics Research Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland, United States of America
| | - Portia Kamthunzi
- Kamuzu Central Hospital, University of North Carolina at Chapel Hill Lilongwe Project, Lilongwe, Malawi
| | - Gerald Tegha
- Kamuzu Central Hospital, University of North Carolina at Chapel Hill Lilongwe Project, Lilongwe, Malawi
| | - Jean Tauzie
- Kamuzu Central Hospital, University of North Carolina at Chapel Hill Lilongwe Project, Lilongwe, Malawi
| | - Elizabeth Petzold
- Duke Clinical Research Institute, Durham, NC, United States of America
| | - Linda Barlow-Mosha
- Makerere University-Johns Hopkins University Research Collaboration, Kampala, Uganda
| | - Benjamin H. Chi
- Department of Obstetrics and Gynecology, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States of America
| | - Yonghua Li
- Department of Pediatrics, Division of Infectious Disease and Immunology, New York University School of Medicine, NY, United States of America
| | - Tiina Ilmet
- Department of Pediatrics, Division of Infectious Disease and Immunology, New York University School of Medicine, NY, United States of America
- Cornell Clinical Trials Unit, Weill Cornell Medicine, NY, United States of America
| | - Brian Kirmse
- Department of Pediatrics, Division of Medical Genetics, University of Mississippi Medical Center, Batson Children’s Hospital, Jackson, MS, United States of America
| | - Jillian Neal
- Laboratory of Malaria Immunology and Vaccinology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, United States of America
| | - Sunil Parikh
- Yale Schools of Public Health and Medicine, New Haven, Connecticut, United States of America
| | - Nagamah Deygoo
- Department of Pediatrics, Division of Infectious Disease and Immunology, New York University School of Medicine, NY, United States of America
| | - Patrick Jean Philippe
- HJF-DAIDS, a Division of the Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Contractor to NIAID, NIH, DHHS, Bethesda, MD, United States of America
| | - Lynne Mofenson
- Elizabeth Glaser Pediatric AIDS Foundation, Washington, DC, United States of America
| | - William Prescott
- HYDAS World Health, Inc., Hummelstown, PA, United States of America
| | - Jingyang Chen
- Laboratory of Malaria Immunology and Vaccinology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, United States of America
- Ben Towne Center for Childhood Cancer Research, Seattle Children’s Research Institute, the University of Washington, and the Fred Hutchinson Cancer Research Center, Seattle WA, United States of America
| | - Philippa Musoke
- Makerere University-Johns Hopkins University Research Collaboration, Kampala, Uganda
- Department of Pediatrics and Child Health, Makerere University, Kampala, Uganda
| | - Paul Palumbo
- Division of Infectious Diseases and International Health, Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire, United States of America
| | - Patrick E. Duffy
- Laboratory of Malaria Immunology and Vaccinology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, United States of America
| | - William Borkowsky
- Department of Pediatrics, Division of Infectious Disease and Immunology, New York University School of Medicine, NY, United States of America
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Heimlich J, Chipoka G, Kamthunzi P, Krysiak R, Majawa Y, Mafunga P, Fedoriw Y, Key N, Ataga K, Gopal S. Establishing sickle cell diagnostics in Malawi using hemoglobin
electrophoresis. Ann Glob Health 2016. [DOI: 10.1016/j.aogh.2016.04.256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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23
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Barlow-Mosha L, Angelidou K, Lindsey J, Archary M, Cotton M, Dittmer S, Fairlie L, Kabugho E, Kamthunzi P, Kinikar A, Mbengeranwa T, Msuya L, Sambo P, Patel K, Barr E, Jean-Phillipe P, Violari A, Mofenson L, Palumbo P, Chi BH. Nevirapine- Versus Lopinavir/Ritonavir-Based Antiretroviral Therapy in HIV-Infected Infants and Young Children: Long-term Follow-up of the IMPAACT P1060 Randomized Trial. Clin Infect Dis 2016; 63:1113-1121. [PMID: 27439527 DOI: 10.1093/cid/ciw488] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Accepted: 07/03/2016] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND The International Maternal Pediatric Adolescent AIDS Clinical Trials Network (IMPAACT) P1060 study demonstrated short-term superiority of lopinavir/ritonavir (LPV/r) over nevirapine (NVP) in antiretroviral therapy (ART), regardless of prior NVP exposure. However, NVP-based ART had a marginal benefit in CD4 percentage (CD4%) and growth. We compared 5-year outcomes from this clinical trial. METHODS Human immunodeficiency virus (HIV)-infected, ART-eligible children were enrolled into 2 cohorts based on prior NVP exposure and randomized to NVP- or LPV/r-based ART. The data safety monitoring board recommended unblinding results in both cohorts due to superiority of LPV/r for the primary endpoint: stopping randomized treatment, virologic failure (VF), or death by 6 months. Participants were offered a switch in regimens (if on NVP) and continued observational follow-up. We compared time to VF or death, death, and CD4% and growth changes using intention-to-treat analyses. Additionally, inverse probability weights were used to account for treatment switching and censoring. RESULTS As of September 2014, 329 of the 451 (73%) enrolled participants were still in follow-up (median, 5.3 years; interquartile range [IQR], 4.3-6.4), with 52% on NVP and 88% on LPV/r as originally randomized. NVP arm participants had significantly higher risk of VF or death (adjusted hazard ratio [aHR], 1.90; 95% confidence interval [CI], 1.37-2.65) but not death alone (aHR, 1.65; 95% CI, .72-3.76) compared with participants randomized to LPV/r. Mean CD4% was significantly higher in the NVP arm up to 1 year after ART initiation, but not beyond. Mean weight-for-age z scores were marginally higher in the NVP arm, but height-for-age z scores did not differ. Similar trends were observed in sensitivity analyses. CONCLUSIONS These findings support the current World Health Organization recommendation of LPV/r in first-line ART regimens for HIV-infected children. CLINICAL TRIALS REGISTRATION NCT00307151.
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Affiliation(s)
- Linda Barlow-Mosha
- Makerere University-Johns Hopkins University Research Collaboration, Kampala, Uganda
| | | | - Jane Lindsey
- Harvard T. H. Chan School of Public Health, Boston, Massachusetts
| | | | | | | | - Lee Fairlie
- Wits Reproductive Health and HIV Institute, Johannesburg, South Africa
| | - Enid Kabugho
- Makerere University-Johns Hopkins University Research Collaboration, Kampala, Uganda
| | | | | | - Tapiwa Mbengeranwa
- University of Zimbabwe-University of California, San Francisco Collaborative Research Programme, Harare, Zimbabwe
| | - Levina Msuya
- Kilimanjaro Christian Medical College, Moshi, Tanzania
| | | | - Kunjal Patel
- Harvard T. H. Chan School of Public Health, Boston, Massachusetts
| | | | - Patrick Jean-Phillipe
- HJF-DAIDS, Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, Maryland
| | | | - Lynne Mofenson
- Elizabeth Glaser Pediatric AIDS Foundation, Washington, District of Columbia
| | - Paul Palumbo
- Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire
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24
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Parr JB, Belson C, Patel JC, Hoffman IF, Kamthunzi P, Martinson F, Tegha G, Thengolose I, Drakeley C, Meshnick SR, Escamillia V, Emch M, Juliano JJ. Estimation of Plasmodium falciparum Transmission Intensity in Lilongwe, Malawi, by Microscopy, Rapid Diagnostic Testing, and Nucleic Acid Detection. Am J Trop Med Hyg 2016; 95:373-7. [PMID: 27325802 DOI: 10.4269/ajtmh.16-0156] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Accepted: 04/27/2016] [Indexed: 01/20/2023] Open
Abstract
Estimates of malaria transmission intensity (MTI) typically rely upon microscopy or rapid diagnostic testing (RDT). However, these methods are less sensitive than nucleic acid amplification techniques and may underestimate parasite prevalence. We compared microscopy, RDT, and polymerase chain reaction (PCR) for the diagnosis of Plasmodium falciparum parasitemia as part of an MTI study of 800 children and adults conducted in Lilongwe, Malawi. PCR detected more cases of parasitemia than microscopy or RDT. Age less than 5 years predicted parasitemia detected by PCR alone (adjusted odds ratio = 1.61, 95% confidence interval = 1.09-2.38, Wald P = 0.02). In addition, we identified one P. falciparum parasite with a false-negative RDT result due to a suspected deletion of the histidine-rich protein 2 (hrp2) gene and used a novel, ultrasensitive PCR assay to detect low-level parasitemia missed by traditional PCR. Molecular methods should be considered for use in future transmission studies as a supplement to RDT or microscopy.
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Affiliation(s)
- Jonathan B Parr
- Division of Infectious Diseases, University of North Carolina, Chapel Hill, North Carolina
| | - Connor Belson
- Department of Biology, University of North Carolina, Chapel Hill, North Carolina
| | - Jaymin C Patel
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina
| | - Irving F Hoffman
- Division of Infectious Diseases, University of North Carolina, Chapel Hill, North Carolina. University of North Carolina Project-Malawi, Lilongwe, Malawi
| | | | | | - Gerald Tegha
- University of North Carolina Project-Malawi, Lilongwe, Malawi
| | | | - Chris Drakeley
- London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Steven R Meshnick
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina
| | - Veronica Escamillia
- Department of Obstetrics and Gynecology, University of Chicago, Chicago, Illinois
| | - Michael Emch
- Department of Geography, University of North Carolina, Chapel Hill, North Carolina
| | - Jonathan J Juliano
- Division of Infectious Diseases, University of North Carolina, Chapel Hill, North Carolina. Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina. Curriculum in Genetics and Molecular Biology, University of North Carolina, Chapel Hill, North Carolina.
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25
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Neafsey DE, Juraska M, Bedford T, Benkeser D, Valim C, Griggs A, Lievens M, Abdulla S, Adjei S, Agbenyega T, Agnandji ST, Aide P, Anderson S, Ansong D, Aponte JJ, Asante KP, Bejon P, Birkett AJ, Bruls M, Connolly KM, D'Alessandro U, Dobaño C, Gesase S, Greenwood B, Grimsby J, Tinto H, Hamel MJ, Hoffman I, Kamthunzi P, Kariuki S, Kremsner PG, Leach A, Lell B, Lennon NJ, Lusingu J, Marsh K, Martinson F, Molel JT, Moss EL, Njuguna P, Ockenhouse CF, Ogutu BR, Otieno W, Otieno L, Otieno K, Owusu-Agyei S, Park DJ, Pellé K, Robbins D, Russ C, Ryan EM, Sacarlal J, Sogoloff B, Sorgho H, Tanner M, Theander T, Valea I, Volkman SK, Yu Q, Lapierre D, Birren BW, Gilbert PB, Wirth DF. Genetic Diversity and Protective Efficacy of the RTS,S/AS01 Malaria Vaccine. N Engl J Med 2015; 373:2025-2037. [PMID: 26488565 PMCID: PMC4762279 DOI: 10.1056/nejmoa1505819] [Citation(s) in RCA: 264] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND The RTS,S/AS01 vaccine targets the circumsporozoite protein of Plasmodium falciparum and has partial protective efficacy against clinical and severe malaria disease in infants and children. We investigated whether the vaccine efficacy was specific to certain parasite genotypes at the circumsporozoite protein locus. METHODS We used polymerase chain reaction-based next-generation sequencing of DNA extracted from samples from 4985 participants to survey circumsporozoite protein polymorphisms. We evaluated the effect that polymorphic positions and haplotypic regions within the circumsporozoite protein had on vaccine efficacy against first episodes of clinical malaria within 1 year after vaccination. RESULTS In the per-protocol group of 4577 RTS,S/AS01-vaccinated participants and 2335 control-vaccinated participants who were 5 to 17 months of age, the 1-year cumulative vaccine efficacy was 50.3% (95% confidence interval [CI], 34.6 to 62.3) against clinical malaria in which parasites matched the vaccine in the entire circumsporozoite protein C-terminal (139 infections), as compared with 33.4% (95% CI, 29.3 to 37.2) against mismatched malaria (1951 infections) (P=0.04 for differential vaccine efficacy). The vaccine efficacy based on the hazard ratio was 62.7% (95% CI, 51.6 to 71.3) against matched infections versus 54.2% (95% CI, 49.9 to 58.1) against mismatched infections (P=0.06). In the group of infants 6 to 12 weeks of age, there was no evidence of differential allele-specific vaccine efficacy. CONCLUSIONS These results suggest that among children 5 to 17 months of age, the RTS,S vaccine has greater activity against malaria parasites with the matched circumsporozoite protein allele than against mismatched malaria. The overall vaccine efficacy in this age category will depend on the proportion of matched alleles in the local parasite population; in this trial, less than 10% of parasites had matched alleles. (Funded by the National Institutes of Health and others.).
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26
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Heimlich JB, Chipoka G, Kamthunzi P, Krysiak R, Majawa Y, Mafunga P, Fedoriw Y, Phiri A, Key NS, Ataga KI, Gopal S. Establishing sickle cell diagnostics and characterizing a paediatric sickle cell disease cohort in Malawi. Br J Haematol 2015; 174:325-9. [PMID: 26455430 DOI: 10.1111/bjh.13769] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Accepted: 08/09/2015] [Indexed: 11/29/2022]
Affiliation(s)
- J Brett Heimlich
- UNC Project-Malawi, Lilongwe, Malawi.,Medical College of Georgia, Georgia Regents University, Augusta, GA, USA
| | | | | | | | | | | | - Yuri Fedoriw
- University of North Carolina, Chapel Hill, NC, USA
| | - Ajib Phiri
- University of Malawi College of Medicine, Blantyre, Malawi
| | - Nigel S Key
- University of North Carolina, Chapel Hill, NC, USA
| | | | - Satish Gopal
- UNC Project-Malawi, Lilongwe, Malawi. .,University of Malawi College of Medicine, Blantyre, Malawi. .,University of North Carolina, Chapel Hill, NC, USA.
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Abstract
BACKGROUND Although pneumonia is the leading cause of child mortality worldwide, little is known about the quality of routine pneumonia care in high burden settings like Malawi that utilize World Health Organization's Integrated Management of Childhood Illnesses (IMCI) guidelines. Due to severe human resource constraints, the majority of clinical care in Malawi is delivered by non-physician clinicians called Clinical Officers (COs). AIM To assess the quality of child pneumonia care delivered by Malawian COs in routine care conditions. METHODS At an outpatient district-level clinic in Lilongwe, Malawi, 10 COs caring for 695 children who presented with fever, cough, or difficulty breathing were compared to IMCI pneumonia diagnostic and treatment guidelines. RESULTS Fewer than 1% of patients received an evaluation by COs that included all 16 elements of the history and physical examination. The respiratory rate was only determined in 16.1% of patients presenting with cough or difficulty breathing. Of the 274 children with IMCI-defined pneumonia, COs correctly diagnosed 30%, and administered correct pneumonia care in less than 25%. COs failed to hospitalize 40.8% of children with severe or very severe pneumonia. CONCLUSIONS IMCI pneumonia care quality at this Malawian government clinic is alarmingly low. Along with reassessing current pneumonia training and supervision approaches, novel quality improvement interventions are necessary to improve care.
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Affiliation(s)
- Erica Bjornstad
- University of North Carolina at Chapel Hill, North Carolina, USA,University of North Carolina Project, Lilongwe, Malawi
| | | | - Norman Lufesi
- Republic of Malawi Ministry of Health, Community Health Sciences Unit, Lilongwe, Malawi
| | - Dan Olson
- University of North Carolina Project, Lilongwe, Malawi
| | | | - Mina C. Hosseinipour
- University of North Carolina at Chapel Hill, North Carolina, USA,University of North Carolina Project, Lilongwe, Malawi
| | - Eric D. McCollum
- University of North Carolina Project, Lilongwe, Malawi,Department of Pediatrics, Division of Pulmonology, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
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Agnandji ST, Lell B, Fernandes JF, Abossolo BP, Methogo BGNO, Kabwende AL, Adegnika AA, Mordmüller B, Issifou S, Kremsner PG, Sacarlal J, Aide P, Lanaspa M, Aponte JJ, Machevo S, Acacio S, Bulo H, Sigauque B, Macete E, Alonso P, Abdulla S, Salim N, Minja R, Mpina M, Ahmed S, Ali AM, Mtoro AT, Hamad AS, Mutani P, Tanner M, Tinto H, D'Alessandro U, Sorgho H, Valea I, Bihoun B, Guiraud I, Kaboré B, Sombié O, Guiguemdé RT, Ouédraogo JB, Hamel MJ, Kariuki S, Oneko M, Odero C, Otieno K, Awino N, McMorrow M, Muturi-Kioi V, Laserson KF, Slutsker L, Otieno W, Otieno L, Otsyula N, Gondi S, Otieno A, Owira V, Oguk E, Odongo G, Woods JB, Ogutu B, Njuguna P, Chilengi R, Akoo P, Kerubo C, Maingi C, Lang T, Olotu A, Bejon P, Marsh K, Mwambingu G, Owusu-Agyei S, Asante KP, Osei-Kwakye K, Boahen O, Dosoo D, Asante I, Adjei G, Kwara E, Chandramohan D, Greenwood B, Lusingu J, Gesase S, Malabeja A, Abdul O, Mahende C, Liheluka E, Malle L, Lemnge M, Theander TG, Drakeley C, Ansong D, Agbenyega T, Adjei S, Boateng HO, Rettig T, Bawa J, Sylverken J, Sambian D, Sarfo A, Agyekum A, Martinson F, Hoffman I, Mvalo T, Kamthunzi P, Nkomo R, Tembo T, Tegha G, Tsidya M, Kilembe J, Chawinga C, Ballou WR, Cohen J, Guerra Y, Jongert E, Lapierre D, Leach A, Lievens M, Ofori-Anyinam O, Olivier A, Vekemans J, Carter T, Kaslow D, Leboulleux D, Loucq C, Radford A, Savarese B, Schellenberg D, Sillman M, Vansadia P. A phase 3 trial of RTS,S/AS01 malaria vaccine in African infants. N Engl J Med 2012; 367:2284-95. [PMID: 23136909 PMCID: PMC10915853 DOI: 10.1056/nejmoa1208394] [Citation(s) in RCA: 537] [Impact Index Per Article: 44.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
BACKGROUND The candidate malaria vaccine RTS,S/AS01 reduced episodes of both clinical and severe malaria in children 5 to 17 months of age by approximately 50% in an ongoing phase 3 trial. We studied infants 6 to 12 weeks of age recruited for the same trial. METHODS We administered RTS,S/AS01 or a comparator vaccine to 6537 infants who were 6 to 12 weeks of age at the time of the first vaccination in conjunction with Expanded Program on Immunization (EPI) vaccines in a three-dose monthly schedule. Vaccine efficacy against the first or only episode of clinical malaria during the 12 months after vaccination, a coprimary end point, was analyzed with the use of Cox regression. Vaccine efficacy against all malaria episodes, vaccine efficacy against severe malaria, safety, and immunogenicity were also assessed. RESULTS The incidence of the first or only episode of clinical malaria in the intention-to-treat population during the 14 months after the first dose of vaccine was 0.31 per person-year in the RTS,S/AS01 group and 0.40 per person-year in the control group, for a vaccine efficacy of 30.1% (95% confidence interval [CI], 23.6 to 36.1). Vaccine efficacy in the per-protocol population was 31.3% (97.5% CI, 23.6 to 38.3). Vaccine efficacy against severe malaria was 26.0% (95% CI, -7.4 to 48.6) in the intention-to-treat population and 36.6% (95% CI, 4.6 to 57.7) in the per-protocol population. Serious adverse events occurred with a similar frequency in the two study groups. One month after administration of the third dose of RTS,S/AS01, 99.7% of children were positive for anti-circumsporozoite antibodies, with a geometric mean titer of 209 EU per milliliter (95% CI, 197 to 222). CONCLUSIONS The RTS,S/AS01 vaccine coadministered with EPI vaccines provided modest protection against both clinical and severe malaria in young infants. (Funded by GlaxoSmithKline Biologicals and the PATH Malaria Vaccine Initiative; RTS,S ClinicalTrials.gov number, NCT00866619.).
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Violari A, Lindsey JC, Hughes MD, Mujuru HA, Barlow-Mosha L, Kamthunzi P, Chi BH, Cotton MF, Moultrie H, Khadse S, Schimana W, Bobat R, Purdue L, Eshleman SH, Abrams EJ, Millar L, Petzold E, Mofenson LM, Jean-Philippe P, Palumbo P. Nevirapine versus ritonavir-boosted lopinavir for HIV-infected children. N Engl J Med 2012; 366:2380-9. [PMID: 22716976 PMCID: PMC3443859 DOI: 10.1056/nejmoa1113249] [Citation(s) in RCA: 159] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND Nevirapine-based antiretroviral therapy is the predominant (and often the only) regimen available for children in resource-limited settings. Nevirapine resistance after exposure to the drug for prevention of maternal-to-child human immunodeficiency virus (HIV) transmission is common, a problem that has led to the recommendation of ritonavir-boosted lopinavir in such settings. Regardless of whether there has been prior exposure to nevirapine, the performance of nevirapine versus ritonavir-boosted lopinavir in young children has not been rigorously established. METHODS In a randomized trial conducted in six African countries and India, we compared the initiation of HIV treatment with zidovudine, lamivudine, and either nevirapine or ritonavir-boosted lopinavir in HIV-infected children 2 to 36 months of age who had no prior exposure to nevirapine. The primary end point was virologic failure or discontinuation of treatment by study week 24. RESULTS A total of 288 children were enrolled; the median percentage of CD4+ T cells was 15%, and the median plasma HIV type 1 (HIV-1) RNA level was 5.7 log(10) copies per milliliter. The percentage of children who reached the primary end point was significantly higher in the nevirapine group than in the ritonavir-boosted lopinavir group (40.8% vs. 19.3%; P<0.001). Among the nevirapine-treated children with virologic failure for whom data on resistance were available, more than half (19 of 32) had resistance at the time of virologic failure. In addition, the time to a protocol-defined toxicity end point was shorter in the nevirapine group (P=0.04), as was the time to death (P=0.06). CONCLUSIONS Outcomes were superior with ritonavir-boosted lopinavir among young children with no prior exposure to nevirapine. Factors that may have contributed to the suboptimal results with nevirapine include elevated viral load at baseline, selection for nevirapine resistance, background regimen of nucleoside reverse-transcriptase inhibitors, and the standard ramp-up dosing strategy. The results of this trial present policymakers with difficult choices. (Funded by the National Institute of Allergy and Infectious Diseases and others; P1060 ClinicalTrials.gov number, NCT00307151.).
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Affiliation(s)
- Avy Violari
- Perinatal HIV Research Unit, University of the Witwatersrand, Johannesburg, South Africa
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Agnandji ST, Lell B, Soulanoudjingar SS, Fernandes JF, Abossolo BP, Conzelmann C, Methogo BGNO, Doucka Y, Flamen A, Mordmüller B, Issifou S, Kremsner PG, Sacarlal J, Aide P, Lanaspa M, Aponte JJ, Nhamuave A, Quelhas D, Bassat Q, Mandjate S, Macete E, Alonso P, Abdulla S, Salim N, Juma O, Shomari M, Shubis K, Machera F, Hamad AS, Minja R, Mtoro A, Sykes A, Ahmed S, Urassa AM, Ali AM, Mwangoka G, Tanner M, Tinto H, D'Alessandro U, Sorgho H, Valea I, Tahita MC, Kaboré W, Ouédraogo S, Sandrine Y, Guiguemdé RT, Ouédraogo JB, Hamel MJ, Kariuki S, Odero C, Oneko M, Otieno K, Awino N, Omoto J, Williamson J, Muturi-Kioi V, Laserson KF, Slutsker L, Otieno W, Otieno L, Nekoye O, Gondi S, Otieno A, Ogutu B, Wasuna R, Owira V, Jones D, Onyango AA, Njuguna P, Chilengi R, Akoo P, Kerubo C, Gitaka J, Maingi C, Lang T, Olotu A, Tsofa B, Bejon P, Peshu N, Marsh K, Owusu-Agyei S, Asante KP, Osei-Kwakye K, Boahen O, Ayamba S, Kayan K, Owusu-Ofori R, Dosoo D, Asante I, Adjei G, Adjei G, Chandramohan D, Greenwood B, Lusingu J, Gesase S, Malabeja A, Abdul O, Kilavo H, Mahende C, Liheluka E, Lemnge M, Theander T, Drakeley C, Ansong D, Agbenyega T, Adjei S, Boateng HO, Rettig T, Bawa J, Sylverken J, Sambian D, Agyekum A, Owusu L, Martinson F, Hoffman I, Mvalo T, Kamthunzi P, Nkomo R, Msika A, Jumbe A, Chome N, Nyakuipa D, Chintedza J, Ballou WR, Bruls M, Cohen J, Guerra Y, Jongert E, Lapierre D, Leach A, Lievens M, Ofori-Anyinam O, Vekemans J, Carter T, Leboulleux D, Loucq C, Radford A, Savarese B, Schellenberg D, Sillman M, Vansadia P. First results of phase 3 trial of RTS,S/AS01 malaria vaccine in African children. N Engl J Med 2011; 365:1863-75. [PMID: 22007715 DOI: 10.1056/nejmoa1102287] [Citation(s) in RCA: 610] [Impact Index Per Article: 46.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
BACKGROUND An ongoing phase 3 study of the efficacy, safety, and immunogenicity of candidate malaria vaccine RTS,S/AS01 is being conducted in seven African countries. METHODS From March 2009 through January 2011, we enrolled 15,460 children in two age categories--6 to 12 weeks of age and 5 to 17 months of age--for vaccination with either RTS,S/AS01 or a non-malaria comparator vaccine. The primary end point of the analysis was vaccine efficacy against clinical malaria during the 12 months after vaccination in the first 6000 children 5 to 17 months of age at enrollment who received all three doses of vaccine according to protocol. After 250 children had an episode of severe malaria, we evaluated vaccine efficacy against severe malaria in both age categories. RESULTS In the 14 months after the first dose of vaccine, the incidence of first episodes of clinical malaria in the first 6000 children in the older age category was 0.32 episodes per person-year in the RTS,S/AS01 group and 0.55 episodes per person-year in the control group, for an efficacy of 50.4% (95% confidence interval [CI], 45.8 to 54.6) in the intention-to-treat population and 55.8% (97.5% CI, 50.6 to 60.4) in the per-protocol population. Vaccine efficacy against severe malaria was 45.1% (95% CI, 23.8 to 60.5) in the intention-to-treat population and 47.3% (95% CI, 22.4 to 64.2) in the per-protocol population. Vaccine efficacy against severe malaria in the combined age categories was 34.8% (95% CI, 16.2 to 49.2) in the per-protocol population during an average follow-up of 11 months. Serious adverse events occurred with a similar frequency in the two study groups. Among children in the older age category, the rate of generalized convulsive seizures after RTS,S/AS01 vaccination was 1.04 per 1000 doses (95% CI, 0.62 to 1.64). CONCLUSIONS The RTS,S/AS01 vaccine provided protection against both clinical and severe malaria in African children. (Funded by GlaxoSmithKline Biologicals and the PATH Malaria Vaccine Initiative; RTS,S ClinicalTrials.gov number, NCT00866619 .).
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Vekemans J, Marsh K, Greenwood B, Leach A, Kabore W, Soulanoudjingar S, Asante KP, Ansong D, Evans J, Sacarlal J, Bejon P, Kamthunzi P, Salim N, Njuguna P, Hamel MJ, Otieno W, Gesase S, Schellenberg D. Assessment of severe malaria in a multicenter, phase III, RTS, S/AS01 malaria candidate vaccine trial: case definition, standardization of data collection and patient care. Malar J 2011; 10:221. [PMID: 21816031 PMCID: PMC3221632 DOI: 10.1186/1475-2875-10-221] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2011] [Accepted: 08/04/2011] [Indexed: 11/10/2022] Open
Abstract
Background An effective malaria vaccine, deployed in conjunction with other malaria interventions, is likely to substantially reduce the malaria burden. Efficacy against severe malaria will be a key driver for decisions on implementation. An initial study of an RTS, S vaccine candidate showed promising efficacy against severe malaria in children in Mozambique. Further evidence of its protective efficacy will be gained in a pivotal, multi-centre, phase III study. This paper describes the case definitions of severe malaria used in this study and the programme for standardized assessment of severe malaria according to the case definition. Methods Case definitions of severe malaria were developed from a literature review and a consensus meeting of expert consultants and the RTS, S Clinical Trial Partnership Committee, in collaboration with the World Health Organization and the Malaria Clinical Trials Alliance. The same groups, with input from an Independent Data Monitoring Committee, developed and implemented a programme for standardized data collection. The case definitions developed reflect the typical presentations of severe malaria in African hospitals. Markers of disease severity were chosen on the basis of their association with poor outcome, occurrence in a significant proportion of cases and on an ability to standardize their measurement across research centres. For the primary case definition, one or more clinical and/or laboratory markers of disease severity have to be present, four major co-morbidities (pneumonia, meningitis, bacteraemia or gastroenteritis with severe dehydration) are excluded, and a Plasmodium falciparum parasite density threshold is introduced, in order to maximize the specificity of the case definition. Secondary case definitions allow inclusion of co-morbidities and/or allow for the presence of parasitaemia at any density. The programmatic implementation of standardized case assessment included a clinical algorithm for evaluating seriously sick children, improvements to care delivery and a robust training and evaluation programme for clinicians. Conclusions The case definition developed for the pivotal phase III RTS, S vaccine study is consistent with WHO recommendations, is locally applicable and appropriately balances sensitivity and specificity in the diagnosis of severe malaria. Processes set up to standardize severe malaria data collection will allow robust assessment of the efficacy of the RTS, S vaccine against severe malaria, strengthen local capacity and benefit patient care for subjects in the trial. Trial registration Clinicaltrials.gov NCT00866619
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Palumbo P, Lindsey JC, Hughes MD, Cotton MF, Bobat R, Meyers T, Bwakura-Dangarembizi M, Chi BH, Musoke P, Kamthunzi P, Schimana W, Purdue L, Eshleman SH, Abrams EJ, Millar L, Petzold E, Mofenson LM, Jean-Philippe P, Violari A. Antiretroviral treatment for children with peripartum nevirapine exposure. N Engl J Med 2010; 363:1510-20. [PMID: 20942667 PMCID: PMC3021781 DOI: 10.1056/nejmoa1000931] [Citation(s) in RCA: 179] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND Single-dose nevirapine is the cornerstone of the regimen for prevention of mother-to-child transmission of human immunodeficiency virus (HIV) in resource-limited settings, but nevirapine frequently selects for resistant virus in mothers and children who become infected despite prophylaxis. The optimal antiretroviral treatment strategy for children who have had prior exposure to single-dose nevirapine is unknown. METHODS We conducted a randomized trial of initial therapy with zidovudine and lamivudine plus either nevirapine or ritonavir-boosted lopinavir in HIV-infected children 6 to 36 months of age, in six African countries, who qualified for treatment according to World Health Organization (WHO) criteria. Results are reported for the cohort that included children exposed to single-dose nevirapine prophylaxis. The primary end point was virologic failure or discontinuation of treatment by study week 24. Enrollment in this cohort was terminated early on the recommendation of the data and safety monitoring board. RESULTS A total of 164 children were enrolled. The median percentage of CD4+ lymphocytes was 19%; a total of 56% of the children had WHO stage 3 or 4 disease. More children in the nevirapine group than in the ritonavir-boosted lopinavir group reached a primary end point (39.6% vs. 21.7%; weighted difference, 18.6 percentage-points; 95% confidence interval, 3.7 to 33.6; nominal P=0.02). Baseline resistance to nevirapine was detected in 18 of 148 children (12%) and was predictive of treatment failure. No significant between-group differences were seen in the rate of adverse events. CONCLUSIONS Among children with prior exposure to single-dose nevirapine for perinatal prevention of HIV transmission, antiretroviral treatment consisting of zidovudine and lamivudine plus ritonavir-boosted lopinavir resulted in better outcomes than did treatment with zidovudine and lamivudine plus nevirapine. Since nevirapine is used for both treatment and perinatal prevention of HIV infection in resource-limited settings, alternative strategies for the prevention of HIV transmission from mother to child, as well as for the treatment of HIV infection, are urgently required. (Funded by the National Institutes of Health; ClinicalTrials.gov number, NCT00307151.).
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Affiliation(s)
- Paul Palumbo
- Department of Medicine, Dartmouth Medical School, Lebanon, NH 03765, USA.
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Ferguson YO, Eng E, Bentley M, Sandelowski M, Steckler A, Randall-David E, Piwoz EG, Zulu C, Chasela C, Soko A, Tembo M, Martinson F, Tohill BC, Ahmed Y, Kazembe P, Jamieson DJ, van der Horst C, Adair L, Ahmed Y, Ait-Khaled M, Albrecht S, Bangdiwala S, Bayer R, Bentley M, Bramson B, Bobrow E, Boyle N, Butera S, Chasela C, Chavula C, Chimerang'ambe J, Chigwenembe M, Chikasema M, Chikhungu N, Chilongozi D, Chiudzu G, Chome L, Cole A, Corbett A, Corneli A, Duerr A, Eliya H, Ellington S, Eron J, Farr S, Ferguson YO, Fiscus S, Galvin S, Guay L, Heilig C, Hoffman I, Hooten E, Hosseinipour M, Hudgens M, Hurst S, Hyde L, Jamieson D, Joaki G, Jones D, Kacheche Z, Kamanga E, Kamanga G, Kampani C, Kamthunzi P, Kamwendo D, Kanyama C, Kashuba A, Kathyola D, Kayira D, Kazembe P, Knight R, Kourtis A, Krysiak R, Kumwenda J, Loeliger E, Luhanga M, Madhlopa V, Majawa M, Maida A, Marcus C, Martinson F, Thoofer N, Matika C, Mayers D, Mayuni I, McDonough M, Meme J, Merry C, Mita K, Mkomawanthu C, Mndala G, Mndala I, Moses A, Msika A, Msungama W, Mtimuni B, Muita J, Mumba N, Musis B, Mwansambo C, Mwapasa G, Nkhoma J, Pendame R, Piwoz E, Raines B, Ramdas Z, Rublein J, Ryan M, Sanne I, Sellers C, Shugars D, Sichali D, Snowden W, Soko A, Spensley A, Steens JM, Tegha G, Tembo M, Thomas R, Tien HC, Tohill B, van der Horst C, Waalberg E, Wiener J, Wilfert C, Wiyo P, Zgambo O, Zimba C. Evaluating nurses' implementation of an infant-feeding counseling protocol for HIV-infected mothers: The Ban Study in Lilongwe, Malawi. AIDS Educ Prev 2009; 21:141-155. [PMID: 19397436 PMCID: PMC2903193 DOI: 10.1521/aeap.2009.21.2.141] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A process evaluation of nurses' implementation of an infant-feeding counseling protocol was conducted for the Breastfeeding, Antiretroviral and Nutrition (BAN) Study, a prevention of mother-to-child transmission of HIV clinical trial in Lilongwe, Malawi. Six trained nurses counseled HIV-infected mothers to exclusively breastfeed for 24 weeks postpartum and to stop breastfeeding within an additional four weeks. Implementation data were collected via direct observations of 123 infant feeding counseling sessions (30 antenatal and 93 postnatal) and interviews with each nurse. Analysis included calculating a percent adherence to checklists and conducting a content analysis for the observation and interview data. Nurses were implementing the protocol at an average adherence level of 90% or above. Although not detailed in the protocol, nurses appropriately counseled mothers on their actual or intended formula milk usage after weaning. Results indicate that nurses implemented the protocol as designed. Results will help to interpret the BAN Study's outcomes.
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