51
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Rojas JD, Reynolds ND, Pike BL, Espinoza NM, Kuroiwa J, Jani V, Ríos PA, Nunez RG, Yori PP, Bernal M, Meza RA, Kosek MN, McCoy AJ, Simons MP, Gregory MJ, Guerry P, Poly FM. Distribution of Capsular Types of Campylobacter jejuni Isolates from Symptomatic and Asymptomatic Children in Peru. Am J Trop Med Hyg 2020; 101:541-548. [PMID: 31392944 PMCID: PMC6726929 DOI: 10.4269/ajtmh.18-0994] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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] [Indexed: 01/01/2023] Open
Abstract
Campylobacter jejuni is the leading bacterial cause of diarrhea worldwide. A capsular polysaccharide (CPS) conjugate vaccine is under development and requires determination of the valency. However, distribution of CPS types circulating globally is presently poorly described. We aimed to determine whether CPS type distribution in Peru differs from that in other endemic regions. We used a multiplex polymerase chain reaction (PCR) assay for the detection of CPS encoding genes capable of distinguishing all 35 CPS types on Campylobacter isolates in two prospective communities based studies conducted in cohorts of children less than 59 months of age in Peru. Results showed that CPS type HS4 complex was the most prevalent, followed by HS3 complex and HS15. Differences in CPS type for symptomatology were not statistically significant. Most subjects demonstrated repeated infections over time with different CPS types, suggesting that CPS types may confer of a level of homologous protective immunity. In this dataset, some differences in CPS type distribution were observed in comparison to other low-middle income countries. Further studies need to be conducted in endemic areas to increase our knowledge of CPS type distribution and guide vaccine development.
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Affiliation(s)
- Jesús D Rojas
- Bacteriology Department, Naval Medical Research Unit-6 (NAMRU-6), Lima, Peru.,Facultad de Ciencias Biológicas, Universidad Nacional Mayor de San Marcos, Lima, Peru
| | | | - Brian L Pike
- U.S. National Medical Research Center, Singapore
| | - Nereyda M Espinoza
- Bacteriology Department, Naval Medical Research Unit-6 (NAMRU-6), Lima, Peru
| | - Janelle Kuroiwa
- Enteric Diseases Department, Infectious Diseases Directorate, Naval Medical Research Center, Silver Spring, Maryland
| | - Vihasi Jani
- Enteric Diseases Department, Infectious Diseases Directorate, Naval Medical Research Center, Silver Spring, Maryland
| | - Paul A Ríos
- Bacteriology Department, Naval Medical Research Unit-6 (NAMRU-6), Lima, Peru
| | - Rosa G Nunez
- Bacteriology Department, Naval Medical Research Unit-6 (NAMRU-6), Lima, Peru
| | - Pablo P Yori
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, Virginia
| | - Manuela Bernal
- Bacteriology Department, Naval Medical Research Unit-6 (NAMRU-6), Lima, Peru
| | - Rina A Meza
- Bacteriology Department, Naval Medical Research Unit-6 (NAMRU-6), Lima, Peru
| | - Margaret N Kosek
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, Virginia
| | - Andrea J McCoy
- Bacteriology Department, Naval Medical Research Unit-6 (NAMRU-6), Lima, Peru
| | - Mark P Simons
- Bacteriology Department, Naval Medical Research Unit-6 (NAMRU-6), Lima, Peru
| | - Michael J Gregory
- Bacteriology Department, Naval Medical Research Unit-6 (NAMRU-6), Lima, Peru
| | - Patricia Guerry
- Enteric Diseases Department, Infectious Diseases Directorate, Naval Medical Research Center, Silver Spring, Maryland
| | - Frédéric M Poly
- Enteric Diseases Department, Infectious Diseases Directorate, Naval Medical Research Center, Silver Spring, Maryland
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52
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Colston JM, Francois R, Pisanic N, Peñataro Yori P, McCormick BJJ, Olortegui MP, Gazi MA, Svensen E, Ahmed MMM, Mduma E, Liu J, Houpt ER, Klapheke R, Schwarz JW, Atmar RL, Black RE, Kosek MN. Effects of Child and Maternal Histo-Blood Group Antigen Status on Symptomatic and Asymptomatic Enteric Infections in Early Childhood. J Infect Dis 2020; 220:151-162. [PMID: 30768135 PMCID: PMC6548901 DOI: 10.1093/infdis/jiz072] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [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: 11/28/2018] [Accepted: 02/13/2019] [Indexed: 01/01/2023] Open
Abstract
Background Histo-blood group antigens (HBGAs) such as fucosyltransferase (FUT)2 and 3 may act as innate host factors that differentially influence susceptibility of individuals and their offspring to pediatric enteric infections. Methods In 3 community-based birth cohorts, FUT2 and FUT3 statuses were ascertained for mother-child dyads. Quantitative polymerase chain reaction panels tested 3663 diarrheal and 18 148 asymptomatic stool samples for 29 enteropathogens. Cumulative diarrhea and infection incidence were compared by child (n = 520) and mothers’ (n = 519) HBGA status and hazard ratios (HRs) derived for all-cause diarrhea and specific enteropathogens. Results Children of secretor (FUT2 positive) mothers had a 38% increased adjusted risk of all-cause diarrhea (HR = 1.38; 95% confidence interval (CI), 1.15–1.66) and significantly reduced time to first diarrheal episode. Child FUT2 and FUT3 positivity reduced the risk for all-cause diarrhea by 29% (HR = 0.81; 95% CI, 0.71–0.93) and 27% (HR = 0.83; 95% CI, 0.74–0.92), respectively. Strong associations between HBGAs and pathogen-specific infection and diarrhea were observed, particularly for noroviruses, rotaviruses, enterotoxigenic Escherichia coli, and Campylobacter jejuni/coli. Conclusions Histo-blood group antigens affect incidence of all-cause diarrhea and enteric infections at magnitudes comparable to many common disease control interventions. Studies measuring impacts of interventions on childhood enteric disease should account for both child and mothers’ HBGA status.
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Affiliation(s)
- Josh M Colston
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Ruthly Francois
- Department of International Health, Johns Hopkins School of Public Health, Baltimore, Maryland
| | - Nora Pisanic
- Department of Environmental Health and Engineering, Johns Hopkins School of Public Health, Baltimore, Maryland
| | - Pablo Peñataro Yori
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville
| | | | | | - Md Amran Gazi
- International Centre for Diarrhoeal Disease Research, Bangladesh
| | | | | | - Esto Mduma
- Haydom Global Health Institute, Haydom, Tanzania
| | - Jie Liu
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville
| | - Eric R Houpt
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville
| | | | | | | | - Robert E Black
- Department of International Health, Johns Hopkins School of Public Health, Baltimore, Maryland
| | - Margaret N Kosek
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville
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53
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Pisanic N, Ballard SB, Colquechagua FD, François R, Exum N, Yori PP, Schwab KJ, Granger DA, Detrick B, Olortegui MP, Mayta H, Sánchez GJ, Gilman RH, Heaney CD, Vinjé J, Kosek MN. Minimally Invasive Saliva Testing to Monitor Norovirus Infection in Community Settings. J Infect Dis 2020; 219:1234-1242. [PMID: 30517651 PMCID: PMC6452293 DOI: 10.1093/infdis/jiy638] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [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: 09/19/2018] [Accepted: 11/28/2018] [Indexed: 12/12/2022] Open
Abstract
Background Norovirus is a leading cause of acute gastroenteritis worldwide. Routine norovirus diagnosis requires stool collection. The goal of this study was to develop and validate a noninvasive method to diagnose norovirus to complement stool diagnostics and to facilitate studies on transmission. Methods A multiplex immunoassay to measure salivary immunoglobulin G (IgG) responses to 5 common norovirus genotypes (GI.1, GII.2, GII.4, GII.6, and GII.17) was developed. The assay was validated using acute and convalescent saliva samples collected from Peruvian children <5 years of age with polymerase chain reaction (PCR)–diagnosed norovirus infections (n = 175) and controls (n = 32). The assay sensitivity and specificity were calculated to determine infection status based on fold rise of salivary norovirus genotype-specific IgG using norovirus genotype from stool as reference. Results The salivary assay detected recent norovirus infections and correctly assigned the infecting genotype. Sensitivity was 71% and specificity was 96% across the evaluated genotypes compared to PCR-diagnosed norovirus infection. Conclusions This saliva-based assay will be a useful tool to monitor norovirus transmission in high-risk settings such as daycare centers or hospitals. Cross-reactivity is limited between the tested genotypes, which represent the most commonly circulating genotypes.
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Affiliation(s)
- Nora Pisanic
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore
| | - Sarah-Blythe Ballard
- Departments of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore.,Department of Preventive Medicine and Biostatistics, Uniformed Services University of the Health Sciences, Bethesda, Maryland
| | - Fabiola D Colquechagua
- Infectious Diseases Research Laboratory, Department of Cellular and Molecular Sciences, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Ruthly François
- Departments of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore
| | - Natalie Exum
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore
| | - Pablo Peñataro Yori
- Departments of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore
| | - Kellogg J Schwab
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore
| | - Douglas A Granger
- Institute for Interdisciplinary Salivary Bioscience, University of California, Irvine.,Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, Maryland.,Department of Acute and Chronic Care, Johns Hopkins University School of Nursing, Baltimore, Maryland.,Department of Population, Family, and Reproductive Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Barbara Detrick
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | | | - Holger Mayta
- Infectious Diseases Research Laboratory, Department of Cellular and Molecular Sciences, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Gerardo J Sánchez
- Infectious Diseases Research Laboratory, Department of Cellular and Molecular Sciences, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Robert H Gilman
- Departments of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore
| | - Christopher D Heaney
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore.,Departments of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore.,Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Jan Vinjé
- National Calicivirus Laboratory, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Margaret N Kosek
- Departments of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore
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54
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Haque MA, Platts-Mills JA, Mduma E, Bodhidatta L, Bessong P, Shakoor S, Kang G, Kosek MN, Lima AAM, Shrestha SK, Alam MA, Havt A, Samie A, Guerrant RL, Lang D, Mahfuz M, Bhutta ZA, Houpt ER, Ahmed T. Determinants of Campylobacter infection and association with growth and enteric inflammation in children under 2 years of age in low-resource settings. Sci Rep 2019; 9:17124. [PMID: 31748573 PMCID: PMC6868199 DOI: 10.1038/s41598-019-53533-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [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: 07/22/2019] [Accepted: 10/31/2019] [Indexed: 12/11/2022] Open
Abstract
Campylobacter species infections have been associated with malnutrition and intestinal inflammation among children in low-resource settings. However, it remains unclear whether that association is specific to Campylobacter jejuni/coli. The aim of this study was to assess the association between both all Campylobacter species infections and Campylobacter jejuni/coli infections on growth and enteric inflammation in children aged 1-24 months. We analyzed data from 1715 children followed from birth until 24 months of age in the MAL-ED birth cohort study, including detection of Campylobacter species by enzyme immunoassay and Campylobacter jejuni/coli by quantitative PCR in stool samples. Myeloperoxidase (MPO) concentration in stool, used as a quantitative index of enteric inflammation, was measured. The incidence rate per 100 child-months of infections with Campylobacter jejuni/coli and Campylobacter species during 1-24 month follow up were 17.7 and 29.6 respectively. Female sex of child, shorter duration of exclusive breastfeeding, lower maternal age, mother having less than 3 living children, maternal educational level of <6 years, lack of routine treatment of drinking water, and unimproved sanitation were associated with Campylobacter jejuni/coli infection. The cumulative burden of both Campylobacter jejuni/coli infections and Campylobacter species were associated with poor growth and increased intestinal inflammation.
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Affiliation(s)
- Md Ahshanul Haque
- Nutrition and Clinical Services Division, icddr,b, Dhaka, Bangladesh.
| | - James A Platts-Mills
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, USA
| | | | | | | | | | | | - Margaret N Kosek
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, USA
- Asociación Benéfica PRISMA, Iquitos, Peru
- Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - Aldo A M Lima
- Clinical Research Unit and Institute of Biomedicine, Federal University of Ceara, Fortaleza, Brazil
| | | | - Md Ashraful Alam
- Nutrition and Clinical Services Division, icddr,b, Dhaka, Bangladesh
| | - Alexandre Havt
- Clinical Research Unit and Institute of Biomedicine, Federal University of Ceara, Fortaleza, Brazil
| | | | - Richard L Guerrant
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, USA
| | - Dennis Lang
- Foundation for the National Institutes of Health, Bethesda, MD, USA
| | - Mustafa Mahfuz
- Nutrition and Clinical Services Division, icddr,b, Dhaka, Bangladesh
| | | | - Eric R Houpt
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, USA
| | - Tahmeed Ahmed
- Nutrition and Clinical Services Division, icddr,b, Dhaka, Bangladesh
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55
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Colston JM, Peñataro Yori P, Moulton LH, Paredes Olortegui M, Kosek PS, Rengifo Trigoso D, Siguas Salas M, Schiaffino F, François R, Fardus-Reid F, Swann JR, Kosek MN. Penalized regression models to select biomarkers of environmental enteric dysfunction associated with linear growth acquisition in a Peruvian birth cohort. PLoS Negl Trop Dis 2019; 13:e0007851. [PMID: 31730639 PMCID: PMC6881068 DOI: 10.1371/journal.pntd.0007851] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 07/05/2019] [Revised: 11/27/2019] [Accepted: 10/16/2019] [Indexed: 12/02/2022] Open
Abstract
Environmental enteric dysfunction (EED) is associated with chronic undernutrition. Efforts to identify minimally invasive biomarkers of EED reveal an expanding number of candidate analytes. An analytic strategy is reported to select among candidate biomarkers and systematically express the strength of each marker’s association with linear growth in infancy and early childhood. 180 analytes were quantified in fecal, urine and plasma samples taken at 7, 15 and 24 months of age from 258 subjects in a birth cohort in Peru. Treating the subjects’ length-for-age Z-score (LAZ-score) over a 2-month lag as the outcome, penalized linear regression models with different shrinkage methods were fitted to determine the best-fitting subset. These were then included with covariates in linear regression models to obtain estimates of each biomarker’s adjusted effect on growth. Transferrin had the largest and most statistically significant adjusted effect on short-term linear growth as measured by LAZ-score–a coefficient value of 0.50 (0.24, 0.75) for each log2 increase in plasma transferrin concentration. Other biomarkers with large effect size estimates included adiponectin, arginine, growth hormone, proline and serum amyloid P-component. The selected subset explained up to 23.0% of the variability in LAZ-score. Penalized regression modeling approaches can be used to select subsets from large panels of candidate biomarkers of EED. There is a need to systematically express the strength of association of biomarkers with linear growth or other outcomes to compare results across studies. Childhood undernutrition is widespread throughout the world and has severe, long-lasting health impacts. Substances measured in blood, urine and stool could be used as biomarkers to identify children undergoing growth failure before these impacts occur. However, it is not yet known which of the many markers that can be identified are accurate and clinically useful predictors of poor growth in infants and children. This study used a large number of candidate biomarkers of immune activation, metabolism and hormones and applied statistical methods to narrow them down from 110 different substances, to the 36 best predictors of growth in 258 Peruvian infants. It also estimated how large the effect of each of these markers was on height two months later. The biomarker with the largest effect was transferrin, a glycoprotein that can be measured in blood samples. 15-month old children with elevated transferrin were around two thirds of a centimeter taller on average at 17 months than those with low levels. Transferrin and other proteins, glycoproteins, hormones and antibodies that this study identified, can be measured easily and affordably in standard laboratories making them feasible to be used broadly as prognostic markers as part of child health and nutrition programs in under-resourced settings.
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Affiliation(s)
- Josh M. Colston
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America
| | - Pablo Peñataro Yori
- Division of Infectious Diseases and International Health, University of Virginia School of Medicine, Charlottesville, Virginia, United States of America
| | - Lawrence H. Moulton
- Department of International Health, Johns Hopkins School of Public Health, Baltimore, Maryland, United States of America
| | | | - Peter S. Kosek
- Oregon Neurosurgery, Eugene, Oregon, United States of America
| | | | | | - Francesca Schiaffino
- Department of International Health, Johns Hopkins School of Public Health, Baltimore, Maryland, United States of America
| | - Ruthly François
- Department of International Health, Johns Hopkins School of Public Health, Baltimore, Maryland, United States of America
| | - Fahmina Fardus-Reid
- Division of Integrative Systems Medicine and Digestive Diseases, Department of Surgery and Cancer, Imperial College London, London, United Kingdom
| | - Jonathan R. Swann
- Division of Integrative Systems Medicine and Digestive Diseases, Department of Surgery and Cancer, Imperial College London, London, United Kingdom
| | - Margaret N. Kosek
- Division of Infectious Diseases and International Health, University of Virginia School of Medicine, Charlottesville, Virginia, United States of America
- * E-mail:
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56
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Schiaffino F, Lee GO, Paredes-Olortegui M, Cabrera L, Penataro-Yori P, Gilman RH, Kosek MN. Evolution of the Bacillus Calmette-Guerin Scar and Its Association with Birth and Pregnancy Characteristics in a Prospective Cohort of Infants in Iquitos, Peru. Am J Perinatol 2019; 36:1264-1270. [PMID: 30583300 PMCID: PMC6591101 DOI: 10.1055/s-0038-1676614] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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] [Indexed: 10/27/2022]
Abstract
BACKGROUND Bacillus Calmette-Guerin (BCG) scar formation is considered a visual marker of vaccination and cell-mediated immune response. This study characterized the association between pregnancy and birth characteristics with BCG scar formation. STUDY DESIGN Pregnant women were enrolled prospectively. Infants were followed up for the first 6 months of life, and the diameter of the BCG scar was recorded. Marginal models were fitted to assess the association of BCG scar diameter with pregnancy and birth characteristics using linear regressions with generalized estimating equations. RESULTS A total of 307 infants were enrolled, of whom 19.2% (59/307) were of low birth weight. Among those with known gestational age, 7.1% were preterm births (21/295). Overall, 98.7% (303/307) of infants developed a BCG scar. BCG scar trends in a tropical environment, such as the Amazon, differ from the trends evidenced in the capital of Peru. For every additional week of gestational age, the mean scar diameter increased by 0.1 mm (95% confidence interval [CI]: 0.02, 0.24; p = 0.017). Maternal illness during pregnancy impacted BCG scar size, as the infants of mothers who self-report fever had a smaller scar diameter (1 mm, 95% CI: 0.5, 1.8 mm; p = 0.001). CONCLUSION The immune reaction to the BCG vaccination is affected by gestational age at birth and systemic inflammatory episodes during pregnancy.
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Affiliation(s)
- Francesca Schiaffino
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland,Faculty of Science and Philosophy, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Gwenyth O. Lee
- Department of Global Community Health and Behavioral Sciences, Tulane University School of Public Health and Tropical Medicine, New Orleans, Louisiana,Department of Epidemiology, School of Public Health, University of Michigan, Ann Arbor, Michigan
| | | | - Lilia Cabrera
- Research and Development Area, Asociación Benéfica Prisma, Iquitos, Lima, Peru
| | - Pablo Penataro-Yori
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland,Research and Development Area, Asociación Benéfica Prisma, Iquitos, Lima, Peru
| | - Robert H. Gilman
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland,Faculty of Science and Philosophy, Universidad Peruana Cayetano Heredia, Lima, Peru,Research and Development Area, Asociación Benéfica Prisma, Iquitos, Lima, Peru
| | - Margaret N. Kosek
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland,Research and Development Area, Asociación Benéfica Prisma, Iquitos, Lima, Peru
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57
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McCormick BJJ, Murray-Kolb LE, Lee GO, Schulze KJ, Ross AC, Bauck A, Lima AAM, Maciel BLL, Kosek MN, Seidman JC, Ambikapathi R, Bose A, John S, Kang G, Turab A, Mduma E, Bessong P, Shrestra SK, Ahmed T, Mahfuz M, Olortegui MP, Bhutta Z, Caulfield LE. Intestinal permeability and inflammation mediate the association between nutrient density of complementary foods and biochemical measures of micronutrient status in young children: results from the MAL-ED study. Am J Clin Nutr 2019; 110:1015-1025. [PMID: 31565748 PMCID: PMC6766446 DOI: 10.1093/ajcn/nqz151] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [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: 12/03/2018] [Accepted: 06/24/2019] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Environmental enteric dysfunction (EED) is thought to increase the risk of micronutrient deficiencies, but few studies adjust for dietary intakes and systemic inflammation. OBJECTIVE We tested whether EED is associated with micronutrient deficiency risk independent of diet and systemic inflammation, and whether it mediates the relation between intake and micronutrient status. METHODS Using data from 1283 children in the MAL-ED (Etiology, Risk Factors, and Interactions of Enteric Infections and Malnutrition and the Consequences for Child Health) birth cohort we evaluated the risk of anemia, low retinol, zinc, and ferritin, and high transferrin receptor (TfR) at 15 mo. We characterized gut inflammation and permeability by myeloperoxidase (MPO), neopterin (NEO), and α-1-antitrypsin (AAT) concentrations from asymptomatic fecal samples averaged from 9 to 15 mo, and averaged the lactulose:mannitol ratio z-score (LMZ) at 9 and 15 mo. Nutrient intakes from complementary foods were quantified monthly from 9 to 15 mo and densities were averaged for analyses. α-1-Acid glycoprotein at 15 mo characterized systemic inflammation. Relations between variables were modeled using a Bayesian network. RESULTS A greater risk of anemia was associated with LMZ [1.15 (95% CI: 1.01, 1.31)] and MPO [1.16 (1.01, 1.34)]. A greater risk of low ferritin was associated with AAT [1.19 (1.03, 1.37)] and NEO [1.22 (1.04, 1.44)]. A greater risk of low retinol was associated with LMZ [1.24 (1.08, 1.45)]. However, MPO was associated with a lower risk of high transferrin receptor [0.86 (0.74, 0.98)], NEO with a lower risk of low retinol [0.75 (0.62, 0.89)], and AAT with a lower risk of low plasma zinc [0.83 (0.70, 0.99)]. Greater nutrient intake densities (vitamins A and B6, calcium, protein, and zinc) were negatively associated with EED. Inverse associations between nutrient densities and micronutrient deficiency largely disappeared after adjustment for EED, suggesting that EED mediates these associations. CONCLUSIONS EED is independently associated with an increased risk of low ferritin, low retinol, and anemia. Greater nutrient density from complementary foods may reduce EED, and the control of micronutrient deficiencies may require control of EED.
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Affiliation(s)
| | - Laura E Murray-Kolb
- Department of Nutritional Sciences, The Pennsylvania State University, University Park, PA, USA
| | - Gwenyth O Lee
- Department of International Health, The Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Kerry J Schulze
- Department of International Health, The Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - A Catharine Ross
- Department of Nutritional Sciences, The Pennsylvania State University, University Park, PA, USA
| | - Aubrey Bauck
- Department of International Health, The Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Aldo A M Lima
- Universidade Federal do Ceará, INCT—Instituto de Biomedicina do Semiárido Brasileiro, Fortaleza, Brazil
| | - Bruna L L Maciel
- Department of Nutrition, Federal University of Rio Grande do Norte, Natal, Rio Negro, Brazil
| | - Margaret N Kosek
- Department of International Health, The Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | | | | | - Anuradha Bose
- Division of Gastrointestinal Sciences, Christian Medical College, Vellore, India
| | - Sushil John
- Division of Gastrointestinal Sciences, Christian Medical College, Vellore, India
| | - Gagandeep Kang
- Division of Gastrointestinal Sciences, Christian Medical College, Vellore, India
| | - Ali Turab
- Centre of Excellence in Women and Child Health, Aga Khan University, Karachi, Pakistan
| | | | | | - Sanjaya K Shrestra
- Walter Reed, Armed Forces Research Institute of Medical Sciences (AFRIMS) Research Unit, Nepal (WARUN), Kathmandu, Nepal
| | - Tahmeed Ahmed
- Division of Nutrition and Clinical Services, icddr,b, Dhaka, Bangladesh
| | - Mustafa Mahfuz
- Division of Nutrition and Clinical Services, icddr,b, Dhaka, Bangladesh
| | | | - Zulfiqar Bhutta
- Centre of Excellence in Women and Child Health, Aga Khan University, Karachi, Pakistan
| | - Laura E Caulfield
- Department of International Health, The Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA,Address correspondence to LEC (E-mail: )
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58
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Richard SA, McCormick BJJ, Murray-Kolb LE, Lee GO, Seidman JC, Mahfuz M, Ahmed T, Guerrant RL, Petri WA, Rogawski ET, Houpt E, Kang G, Mduma E, Kosek MN, Lima AAM, Shrestha SK, Chandyo RK, Bhutta Z, Bessong P, Caulfield LE. Enteric dysfunction and other factors associated with attained size at 5 years: MAL-ED birth cohort study findings. Am J Clin Nutr 2019; 110:131-138. [PMID: 31127812 PMCID: PMC6599740 DOI: 10.1093/ajcn/nqz004] [Citation(s) in RCA: 24] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Accepted: 01/07/2019] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Poor growth in early childhood has been associated with increased risk of mortality and morbidity, as well as long-term deficits in cognitive development and economic productivity. OBJECTIVES Data from the MAL-ED cohort study were used to identify factors in the first 2 y of life that are associated with height-for-age, weight-for-age, and body mass index z-scores (HAZ, WAZ, BMIZ) at 5 y of age. METHODS A total of 1017 children were followed from near birth until 5 y of age at sites in Bangladesh, Brazil, India, Nepal, Peru, South Africa, and Tanzania. Data were collected on their growth, environmental enteric dysfunction (EED), micronutrient status, enteric pathogen burden, illness prevalence, dietary intake, and various other socio-economic and environmental factors. RESULTS EED biomarkers were related to size at 5 y. Mean lactulose:mannitol z-scores during the first 2 y of life were negatively associated with all of the growth measures (HAZ: -0.11 [95% CI: -0.19, -0.03]; WAZ: -0.16 [95% CI: -0.26, -0.06]; BMIZ: -0.11 [95% CI: -0.23, 0.0]). Myeloperoxidase was negatively associated with weight (WAZ: -0.52 [95% CI: -0.78, -0.26] and BMIZ: -0.56 [95% CI: -0.86, -0.26]); whereas α-1-antitrypsin had a negative association with HAZ (-0.28 [95% CI: -0.52, -0.04]). Transferrin receptor was positively related to HAZ (0.18 [95% CI: 0.06, 0.30]) and WAZ (0.21 [95% CI: 0.07, 0.35]). Hemoglobin was positively related to HAZ (0.06 [95% CI: 0.00, 0.12]), and ferritin was negatively related to HAZ (-0.08 [95% CI: -0.12, -0.04]). Bacterial density in stool was negatively associated with HAZ (-0.04 [95% CI: -0.08, 0.00]), but illness symptoms did not have any effect on size at 5 y. CONCLUSIONS EED markers, bacterial density, and iron markers are associated with growth at 5 y of age. Interventions to reduce bacterial burden and EED may improve long-term growth in low-income settings.
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Affiliation(s)
| | | | | | - Gwyneth O Lee
- The Johns Hopkins University, Baltimore, MD,Present address for GOL: University of Michigan, Ann Arbor, MI
| | | | - Mustafa Mahfuz
- International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh
| | - Tahmeed Ahmed
- International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh
| | | | - William A Petri
- University of Virginia, School of Medicine, Charlottesville, VA
| | | | - Eric Houpt
- University of Virginia, School of Medicine, Charlottesville, VA
| | - Gagandeep Kang
- Christian Medical College, Division of Gastrointestinal Sciences, Vellore, Tamil Nadu, India
| | | | | | - Aldo A M Lima
- Universidade Federal do Ceará, INCT—Instituto de Biomedicina do Semiárido Brasileiro, Fortaleza, Brazil
| | - Sanjaya K Shrestha
- Walter Reed Armed Forces Research Institute of Medical Sciences (AFRIMS) Research Unit (WARUN), Kathmandu, Nepal
| | - Ram K Chandyo
- Institute of Medicine, Tribhuvan University, Kathmandu, Nepal,Present address for RKC: Kathmandu Medical College, Kathmandu, Nepal
| | - Zulfiqar Bhutta
- Aga Khan University, Centre of Excellence in Women and Child Health, Karachi, Pakistan,Present address for ZB: University of Toronto, Toronto, Canada
| | | | - Laura E Caulfield
- The Johns Hopkins University, Baltimore, MD,Address correspondence to LEC (e-mail: )
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Colston JM, Zaitchik B, Kang G, Peñataro Yori P, Ahmed T, Lima A, Turab A, Mduma E, Sunder Shrestha P, Bessong P, Peng RD, Black RE, Moulton LH, Kosek MN. Use of earth observation-derived hydrometeorological variables to model and predict rotavirus infection (MAL-ED): a multisite cohort study. Lancet Planet Health 2019; 3:e248-e258. [PMID: 31229000 PMCID: PMC6650544 DOI: 10.1016/s2542-5196(19)30084-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 04/08/2019] [Accepted: 04/09/2019] [Indexed: 05/25/2023]
Abstract
BACKGROUND Climate change threatens to undermine recent progress in reducing global deaths from diarrhoeal disease in children. However, the scarcity of evidence about how individual environmental factors affect transmission of specific pathogens makes prediction of trends under different climate scenarios challenging. We aimed to model associations between daily estimates of a suite of hydrometeorological variables and rotavirus infection status ascertained through community-based surveillance. METHODS For this analysis of multisite cohort data, rotavirus infection status was ascertained through community-based surveillance of infants in the eight-site MAL-ED cohort study, and matched by date with earth observation estimates of nine hydrometeorological variables from the Global Land Data Assimilation System: daily total precipitation volume (mm), daily total surface runoff (mm), surface pressure (mbar), wind speed (m/s), relative humidity (%), soil moisture (%), solar radiation (W/m2), specific humidity (kg/kg), and average daily temperatures (°C). Lag relationships, independent effects, and interactions were characterised by use of modified Poisson models and compared with and without adjustment for seasonality and between-site variation. Final models were created with stepwise selection of main effects and interactions and their validity assessed by excluding each site in turn and calculating Tjur's Coefficients of Determination. FINDINGS All nine hydrometeorological variables were significantly associated with rotavirus infection after adjusting for seasonality and between-site variation over multiple consecutive or non-consecutive lags, showing complex, often non-linear associations that differed by symptom status and showed considerable mutual interaction. The final models explained 5·9% to 6·2% of the variability in rotavirus infection in the pooled data and their predictions explained between 0·0% and 14·1% of the variability at individual study sites. INTERPRETATION These results suggest that the effect of climate on rotavirus transmission was mediated by four independent mechanisms: waterborne dispersal, airborne dispersal, virus survival on soil and surfaces, and host factors. Earth observation data products available at a global scale and at subdaily resolution can be combined with longitudinal surveillance data to test hypotheses about routes and drivers of transmission but showed little potential for making predictions in this setting. FUNDING Bill & Melinda Gates Foundation; Foundation for the National Institutes of Health, National Institutes of Health, Fogarty International Center; Sherrilyn and Ken Fisher Center for Environmental Infectious Diseases, Johns Hopkins School of Medicine; and NASA's Group on Earth Observations Work Programme.
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Affiliation(s)
- Josh M Colston
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Benjamin Zaitchik
- Department of Earth and Planetary Sciences, Johns Hopkins Krieger School of Arts and Sciences, Baltimore, MD, USA
| | | | - Pablo Peñataro Yori
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Tahmeed Ahmed
- Nutrition & Clinical Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh
| | - Aldo Lima
- Federal University of Ceará, Fortaleza, Brazil
| | - Ali Turab
- Interactive Research and Development, Maternal and Child Health (MCH) Program, Karachi, Pakistan
| | - Esto Mduma
- Haydom Global Health Institute, Haydom, Tanzania
| | | | | | - Roger D Peng
- Department of Biostatistics, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Robert E Black
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Lawrence H Moulton
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Margaret N Kosek
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.
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Schiaffino F, Colston JM, Paredes-Olortegui M, François R, Pisanic N, Burga R, Peñataro-Yori P, Kosek MN. Antibiotic Resistance of Campylobacter Species in a Pediatric Cohort Study. Antimicrob Agents Chemother 2019; 63:e01911-18. [PMID: 30420482 PMCID: PMC6355604 DOI: 10.1128/aac.01911-18] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [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: 09/05/2018] [Accepted: 11/06/2018] [Indexed: 12/22/2022] Open
Abstract
The objective of this study was to determine the phenotypic patterns of antibiotic resistance and the epidemiology of drug-resistant Campylobacter spp. from a low-resource setting. A birth cohort of 303 patients was followed until 5 years of age. Stool samples from asymptomatic children (n = 10,008) and those with diarrhea (n = 3,175) were cultured for Campylobacter Disk diffusion for ciprofloxacin (CIP), nalidixic acid (NAL), erythromycin (ERY), azithromycin (AZM), tetracycline (TE), gentamicin (GM), ampicillin (AMP), amoxicillin and clavulanic acid (AMC), ceftriaxone (CRO), chloramphenicol (C), and trimethoprim-sulfamethoxazole (TMS) was determined. Antibiotic resistances in Campylobacter jejuni and non-C. jejuni isolates from surveillance and diarrhea samples were compared, and the association between personal macrolide exposure and subsequent occurrence of a macrolide-resistant Campylobacter spp. was assessed. Of 917 Campylobacter isolates, 77.4% of C. jejuni isolates and 79.8% of non-C. jejuni isolates were resistant to ciprofloxacin, while 4.9% of C. jejuni isolates and 24.8% of non-C. jejuni isolates were not susceptible to azithromycin. Of the 303 children, 33.1% had been diagnosed with a Campylobacter strain nonsusceptible to both azithromycin and ciprofloxacin. Personal macrolide exposure did not affect the risk of macrolide-resistant Campylobacter Amoxicillin and clavulanic acid (94.0%) was one of the antibiotics with the highest rates of susceptibility. There is a high incidence of quinolone- and macrolide-resistant Campylobacter infections in infants under 24 months of age. Given the lack of association between personal exposure to macrolides and a subsequent Campylobacter infection resistant to macrolides, there is a need to evaluate the source of multidrug-resistant (MDR) Campylobacter This study provides compelling evidence to propose amoxicillin/clavulanic acid as a treatment for campylobacteriosis.
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Affiliation(s)
- Francesca Schiaffino
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
- Faculty of Science and Philosophy, Universidad Peruana Cayetano Heredia, Lima, Peru
| | - Josh M Colston
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | | | - Ruthly François
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Nora Pisanic
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Rosa Burga
- U.S. Naval Medical Research Unit 6 (NAMRU-6), Iquitos, Loreto, Peru
| | - Pablo Peñataro-Yori
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
- Asociación Benéfica Prisma, Iquitos, Loreto, Peru
| | - Margaret N Kosek
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
- Asociación Benéfica Prisma, Iquitos, Loreto, Peru
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Dicker D, Nguyen G, Abate D, Abate KH, Abay SM, Abbafati C, Abbasi N, Abbastabar H, Abd-Allah F, Abdela J, Abdelalim A, Abdel-Rahman O, Abdi A, Abdollahpour I, Abdulkader RS, Abdurahman AA, Abebe HT, Abebe M, Abebe Z, Abebo TA, Aboyans V, Abraha HN, Abrham AR, Abu-Raddad LJ, Abu-Rmeileh NME, Accrombessi MMK, Acharya P, Adebayo OM, Adedeji IA, Adedoyin RA, Adekanmbi V, Adetokunboh OO, Adhena BM, Adhikari TB, Adib MG, Adou AK, Adsuar JC, Afarideh M, Afshin A, Agarwal G, Aggarwal R, Aghayan SA, Agrawal S, Agrawal A, Ahmadi M, Ahmadi A, Ahmadieh H, Ahmed MLCB, Ahmed S, Ahmed MB, Aichour AN, Aichour I, Aichour MTE, Akanda AS, Akbari ME, Akibu M, Akinyemi RO, Akinyemiju T, Akseer N, Alahdab F, Al-Aly Z, Alam K, Alebel A, Aleman AV, Alene KA, Al-Eyadhy A, Ali R, Alijanzadeh M, Alizadeh-Navaei R, Aljunid SM, Alkerwi A, Alla F, Allebeck P, Allen CA, Alonso J, Al-Raddadi RM, Alsharif U, Altirkawi K, Alvis-Guzman N, Amare AT, Amini E, Ammar W, Amoako YA, Anber NH, Andrei CL, Androudi S, Animut MD, Anjomshoa M, Anlay DZ, Ansari H, Ansariadi A, Ansha MG, Antonio CAT, Appiah SCY, Aremu O, Areri HA, Ärnlöv J, Arora M, Artaman A, Aryal KK, Asadi-Lari M, Asayesh H, Asfaw ET, Asgedom SW, Assadi R, Ataro Z, Atey TMM, Athari SS, Atique S, Atre SR, Atteraya MS, Attia EF, Ausloos M, Avila-Burgos L, Avokpaho EFGA, Awasthi A, Awuah B, Ayala Quintanilla BP, Ayele HT, Ayele Y, Ayer R, Ayuk TB, Azzopardi PS, Azzopardi-Muscat N, Badali H, Badawi A, Balakrishnan K, Bali AG, Banach M, Banstola A, Barac A, Barboza MA, Barquera S, Barrero LH, Basaleem H, Bassat Q, Basu A, Basu S, Baune BT, Bazargan-Hejazi S, Bedi N, Beghi E, Behzadifar M, Behzadifar M, Béjot Y, Bekele BB, Belachew AB, Belay AG, Belay E, Belay SA, Belay YA, Bell ML, Bello AK, Bennett DA, Bensenor IM, Berhane A, Berman AE, Bernabe E, Bernstein RS, Bertolacci GJ, Beuran M, Beyranvand T, Bhala N, Bhatia E, Bhatt S, Bhattarai S, Bhaumik S, Bhutta ZA, Biadgo B, Bijani A, Bikbov B, Bililign N, Bin Sayeed MS, Birlik SM, Birungi C, Bisanzio D, Biswas T, Bjørge T, Bleyer A, Basara BB, Bose D, Bosetti C, Boufous S, Bourne R, Brady OJ, Bragazzi NL, Brant LC, Brazinova A, Breitborde NJK, Brenner H, Britton G, Brugha T, Burke KE, Busse R, Butt ZA, Cahuana-Hurtado L, Callender CSKH, Campos-Nonato IR, Campuzano Rincon JC, Cano J, Car M, Cárdenas R, Carreras G, Carrero JJ, Carter A, Carvalho F, Castañeda-Orjuela CA, Castillo Rivas J, Castro F, Catalá-López F, Çavlin A, Cerin E, Chaiah Y, Champs AP, Chang HY, Chang JC, Chattopadhyay A, Chaturvedi P, Chen W, Chiang PPC, Chimed-Ochir O, Chin KL, Chisumpa VH, Chitheer A, Choi JYJ, Christensen H, Christopher DJ, Chung SC, Cicuttini FM, Ciobanu LG, Cirillo M, Claro RM, Cohen AJ, Collado-Mateo D, Constantin MM, Conti S, Cooper C, Cooper LT, Cortesi PA, Cortinovis M, Cousin E, Criqui MH, Cromwell EA, Crowe CS, Crump JA, Cucu A, Cunningham M, Daba AK, Dachew BA, Dadi AF, Dandona L, Dandona R, Dang AK, Dargan PI, Daryani A, Das SK, Das Gupta R, das Neves J, Dasa TT, Dash AP, Weaver ND, Davitoiu DV, Davletov K, Dayama A, Courten BD, De la Hoz FP, De leo D, De Neve JW, Degefa MG, Degenhardt L, Degfie TT, Deiparine S, Dellavalle RP, Demoz GT, Demtsu BB, Denova-Gutiérrez E, Deribe K, Dervenis N, Des Jarlais DC, Dessie GA, Dey S, Dharmaratne SD, Dhimal M, Ding EL, Djalalinia S, Doku DT, Dolan KA, Donnelly CA, Dorsey ER, Douwes-Schultz D, Doyle KE, Drake TM, Driscoll TR, Dubey M, Dubljanin E, Duken EE, Duncan BB, Duraes AR, Ebrahimi H, Ebrahimpour S, Edessa D, Edvardsson D, Eggen AE, El Bcheraoui C, El Sayed Zaki M, Elfaramawi M, El-Khatib Z, Ellingsen CL, Elyazar IRF, Enayati A, Endries AYY, Er B, Ermakov SP, Eshrati B, Eskandarieh S, Esmaeili R, Esteghamati A, Esteghamati S, Fakhar M, Fakhim H, Farag T, Faramarzi M, Fareed M, Farhadi F, Farid TA, Farinha CSES, Farioli A, Faro A, Farvid MS, Farzadfar F, Farzaei MH, Fazeli MS, Feigin VL, Feigl AB, Feizy F, Fentahun N, Fereshtehnejad SM, Fernandes E, Fernandes JC, Feyissa GT, Fijabi DO, Filip I, Finegold S, Fischer F, Flor LS, Foigt NA, Ford JA, Foreman KJ, Fornari C, Frank TD, Franklin RC, Fukumoto T, Fuller JE, Fullman N, Fürst T, Furtado JM, Futran ND, Galan A, Gallus S, Gambashidze K, Gamkrelidze A, Gankpe FG, Garcia-Basteiro AL, Garcia-Gordillo MA, Gebre T, Gebre AK, Gebregergs GB, Gebrehiwot TT, Gebremedhin AT, Gelano TF, Gelaw YA, Geleijnse JM, Genova-Maleras R, Gessner BD, Getachew S, Gething PW, Gezae KE, Ghadami MR, Ghadimi R, Ghasemi Falavarjani K, Ghasemi-Kasman M, Ghiasvand H, Ghimire M, Ghoshal AG, Gill PS, Gill TK, Gillum RF, Giussani G, Goenka S, Goli S, Gomez RS, Gomez-Cabrera MC, Gómez-Dantés H, Gona PN, Goodridge A, Gopalani SV, Goto A, Goulart AC, Goulart BNG, Grada A, Grosso G, Gugnani HC, Guimaraes ALS, Guo Y, Gupta PC, Gupta R, Gupta R, Gupta T, Gyawali B, Haagsma JA, Hachinski V, Hafezi-Nejad N, Hagos TB, Hailegiyorgis TT, Hailu GB, Haj-Mirzaian A, Haj-Mirzaian A, Hamadeh RR, Hamidi S, Handal AJ, Hankey GJ, Harb HL, Harikrishnan S, Haririan H, Haro JM, Hasan M, Hassankhani H, Hassen HY, Havmoeller R, Hay RJ, Hay SI, He Y, Hedayatizadeh-Omran A, Hegazy MI, Heibati B, Heidari M, Hendrie D, Henok A, Henry NJ, Heredia-Pi I, Herteliu C, Heydarpour F, Heydarpour P, Heydarpour S, Hibstu DT, Hoek HW, Hole MK, Homaie Rad E, Hoogar P, Horino M, Hosgood HD, Hosseini SM, Hosseinzadeh M, Hostiuc S, Hostiuc M, Hotez PJ, Hoy DG, Hsairi M, Htet AS, Hu G, Huang JJ, Husseini A, Hussen MM, Hutfless S, Iburg KM, Igumbor EU, Ikeda CT, Ilesanmi OS, Iqbal U, Irvani SSN, Isehunwa OO, Islam SMS, Islami F, Jahangiry L, Jahanmehr N, Jain R, Jain SK, Jakovljevic M, James SL, Javanbakht M, Jayaraman S, Jayatilleke AU, Jee SH, Jeemon P, Jha RP, Jha V, Ji JS, Johnson SC, Jonas JB, Joshi A, Jozwiak JJ, Jungari SB, Jürisson M, K M, Kabir Z, Kadel R, Kahsay A, Kahssay M, Kalani R, Kapil U, Karami M, Karami Matin B, Karch A, Karema C, Karimi N, Karimi SM, Karimi-Sari H, Kasaeian A, Kassa GM, Kassa TD, Kassa ZY, Kassebaum NJ, Katibeh M, Katikireddi SV, Kaul A, Kawakami N, Kazemeini H, Kazemi Z, Karyani AK, K C P, Kebede S, Keiyoro PN, Kemp GR, Kengne AP, Keren A, Kereselidze M, Khader YS, Khafaie MA, Khajavi A, Khalid N, Khalil IA, Khan EA, Khan G, Khan MS, Khan MA, Khang YH, Khanna T, Khater MM, Khatony A, Khazaie H, Khoja AT, Khosravi A, Khosravi MH, Khubchandani J, Kiadaliri AA, Kibret GDD, Kim CI, Kim D, Kim JY, Kim YE, Kimokoti RW, Kinfu Y, Kinra S, Kisa A, Kissimova-Skarbek K, Kissoon N, Kivimäki M, Kleber ME, Knibbs LD, Knudsen AKS, Kochhar S, Kokubo Y, Kolola T, Kopec JA, Kosek MN, Kosen S, Koul PA, Koyanagi A, Kravchenko MA, Krishan K, Krishnaswami S, Kuate Defo B, Kucuk Bicer B, Kudom AA, Kuipers EJ, Kulikoff XR, Kumar GA, Kumar M, Kumar P, Kumsa FA, Kutz MJ, Lad SD, Lafranconi A, Lal DK, Lalloo R, Lam H, Lami FH, Lan Q, Langan SM, Lansingh VC, Lansky S, Larson HJ, Laryea DO, Lassi ZS, Latifi A, Lavados PM, Laxmaiah A, Lazarus JV, Lebedev G, Lee PH, Leigh J, Leshargie CT, Leta S, Levi M, Li S, Li Y, Li X, Liang J, Liang X, Liben ML, Lim LL, Lim SS, Limenih MA, Linn S, Liu S, Liu Y, Lodha R, Logroscino G, Lonsdale C, Lorch SA, Lorkowski S, Lotufo PA, Lozano R, Lucas TCD, Lunevicius R, Lyons RA, Ma S, Mabika C, Macarayan ERK, Mackay MT, Maddison ER, Maddison R, Madotto F, Magdy Abd El Razek H, Magdy Abd El Razek M, Maghavani DP, Majdan M, Majdzadeh R, Majeed A, Malekzadeh R, Malik MA, Malta DC, Mamun AA, Manamo WA, Manda AL, Mansournia MA, Mantovani LG, Mapoma CC, Marami D, Maravilla JC, Marcenes W, Marina S, Martinez-Raga J, Martins SCO, Martins-Melo FR, März W, Marzan MB, Mashamba-Thompson TP, Masiye F, Massenburg BB, Maulik PK, Mazidi M, McGrath JJ, McKee M, Mehata S, Mehendale SM, Mehndiratta MM, Mehrotra R, Mehta KM, Mehta V, Mekonen T, Mekonnen TC, Meles HG, Meles KG, Melese A, Melku M, Memiah PTN, Memish ZA, Mendoza W, Mengistu DT, Mengistu G, Mensah GA, Mereta ST, Meretoja A, Meretoja TJ, Mestrovic T, Mezgebe HB, Miangotar Y, Miazgowski B, Miazgowski T, Miller TR, Mini GK, Mirica A, Mirrakhimov EM, Misganaw AT, Moazen B, Moges NA, Mohammad KA, Mohammadi M, Mohammadifard N, Mohammadi-Khanaposhtani M, Mohammadnia-Afrouzi M, Mohammed S, Mohammed MA, Mohan V, Mokdad AH, Molokhia M, Monasta L, Moradi G, Moradi M, Moradi-Lakeh M, Moradinazar M, Moraga P, Morawska L, Moreno Velásquez I, Morgado-da-Costa J, Morrison SD, Mosapour A, Moschos MM, Mousavi SM, Muche AA, Muchie KF, Mueller UO, Mukhopadhyay S, Mullany EC, Muller K, Murhekar M, Murphy TB, Murthy GVS, Murthy S, Musa J, Musa KI, Mustafa G, Muthupandian S, Nachega JB, Nagel G, Naghavi M, Naheed A, Nahvijou A, Naik G, Nair S, Najafi F, Nangia V, Nansseu JR, Nascimento BR, Nawaz H, Ncama BP, Neamati N, Negoi I, Negoi RI, Neupane S, Newton CRJ, Ngalesoni FN, Ngunjiri JW, Nguyen HT, Nguyen HT, Nguyen LH, Nguyen M, Nguyen TH, Ningrum DNA, Nirayo YL, Nisar MI, Nixon MR, Nolutshungu N, Nomura S, Norheim OF, Noroozi M, Norrving B, Noubiap JJ, Nouri HR, Nourollahpour Shiadeh M, Nowroozi MR, Nsoesie EO, Nyasulu PS, Ofori-Asenso R, Ogah OS, Ogbo FA, Oh IH, Okoro A, Oladimeji O, Olagunju AT, Olagunju TO, Olivares PR, Olusanya BO, Olusanya JO, Ong SK, Opio JN, Oren E, Ortiz JR, Ortiz A, Ota E, Otstavnov SS, Øverland S, Owolabi MO, Oyekale AS, P A M, Pacella R, Pakhale S, Pakhare AP, Pana A, Panda BK, Panda-Jonas S, Pandey AR, Pandian JD, Parisi A, Park EK, Parry CDH, Parsian H, Patel S, Patle A, Patten SB, Patton GC, Paudel D, Pearce N, Peprah EK, Pereira A, Pereira DM, Perez KM, Perico N, Pervaiz A, Pesudovs K, Petri WA, Petzold M, Phillips MR, Pigott DM, Pillay JD, Pirsaheb M, Pishgar F, Plass D, Polinder S, Pond CD, Popova S, Postma MJ, Pourmalek F, Pourshams A, Poustchi H, Prabhakaran D, Prakash V, Prakash S, Prasad N, Qorbani M, Quistberg DA, Radfar A, Rafay A, Rafiei A, Rahim F, Rahimi K, Rahimi-Movaghar A, Rahimi-Movaghar V, Rahman M, Rahman MHU, Rahman MA, Rahman SU, Rai RK, Rajati F, Rajsic S, Raju SB, Ram U, Ranabhat CL, Ranjan P, Ranta A, Rasella D, Rawaf DL, Rawaf S, Ray SE, Razo-García C, Rego MAS, Rehm J, Reiner RC, Reinig N, Reis C, Remuzzi G, Renzaho AMN, Resnikoff S, Rezaei S, Rezaeian S, Rezai MS, Riahi SM, Ribeiro ALP, Riojas H, Rios-Blancas MJ, Roba KT, Robinson SR, Roever L, Ronfani L, Roshandel G, Roshchin DO, Rostami A, Rothenbacher D, Rubagotti E, Ruhago GM, Saadat S, Sabde YD, Sachdev PS, Saddik B, Sadeghi E, Moghaddam SS, Safari H, Safari Y, Safari-Faramani R, Safdarian M, Safi S, Safiri S, Sagar R, Sahebkar A, Sahraian MA, Sajadi HS, Salahshoor MR, Salam N, Salama JS, Salamati P, Saldanha RDF, Salimi Y, Salimzadeh H, Salz I, Sambala EZ, Samy AM, Sanabria J, Sanchez-Niño MD, Santos IS, Santos JV, Santric Milicevic MM, Sao Jose BP, Sardana M, Sarker AR, Sarrafzadegan N, Sartorius B, Sarvi S, Sathian B, Satpathy M, Savic M, Sawant AR, Sawhney M, Saxena S, Sayyah M, Scaria V, Schaeffner E, Schelonka K, Schmidt MI, Schneider IJC, Schöttker B, Schutte AE, Schwebel DC, Schwendicke F, Scott JG, Sekerija M, Sepanlou SG, Serván-Mori E, Shabaninejad H, Shackelford KA, Shafieesabet A, Shaheen AA, 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Global, regional, and national age-sex-specific mortality and life expectancy, 1950-2017: a systematic analysis for the Global Burden of Disease Study 2017. Lancet 2018; 392:1684-1735. [PMID: 30496102 PMCID: PMC6227504 DOI: 10.1016/s0140-6736(18)31891-9] [Citation(s) in RCA: 575] [Impact Index Per Article: 95.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 07/14/2018] [Accepted: 08/08/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND Assessments of age-specific mortality and life expectancy have been done by the UN Population Division, Department of Economics and Social Affairs (UNPOP), the United States Census Bureau, WHO, and as part of previous iterations of the Global Burden of Diseases, Injuries, and Risk Factors Study (GBD). Previous iterations of the GBD used population estimates from UNPOP, which were not derived in a way that was internally consistent with the estimates of the numbers of deaths in the GBD. The present iteration of the GBD, GBD 2017, improves on previous assessments and provides timely estimates of the mortality experience of populations globally. METHODS The GBD uses all available data to produce estimates of mortality rates between 1950 and 2017 for 23 age groups, both sexes, and 918 locations, including 195 countries and territories and subnational locations for 16 countries. Data used include vital registration systems, sample registration systems, household surveys (complete birth histories, summary birth histories, sibling histories), censuses (summary birth histories, household deaths), and Demographic Surveillance Sites. In total, this analysis used 8259 data sources. Estimates of the probability of death between birth and the age of 5 years and between ages 15 and 60 years are generated and then input into a model life table system to produce complete life tables for all locations and years. Fatal discontinuities and mortality due to HIV/AIDS are analysed separately and then incorporated into the estimation. We analyse the relationship between age-specific mortality and development status using the Socio-demographic Index, a composite measure based on fertility under the age of 25 years, education, and income. There are four main methodological improvements in GBD 2017 compared with GBD 2016: 622 additional data sources have been incorporated; new estimates of population, generated by the GBD study, are used; statistical methods used in different components of the analysis have been further standardised and improved; and the analysis has been extended backwards in time by two decades to start in 1950. FINDINGS Globally, 18·7% (95% uncertainty interval 18·4-19·0) of deaths were registered in 1950 and that proportion has been steadily increasing since, with 58·8% (58·2-59·3) of all deaths being registered in 2015. At the global level, between 1950 and 2017, life expectancy increased from 48·1 years (46·5-49·6) to 70·5 years (70·1-70·8) for men and from 52·9 years (51·7-54·0) to 75·6 years (75·3-75·9) for women. Despite this overall progress, there remains substantial variation in life expectancy at birth in 2017, which ranges from 49·1 years (46·5-51·7) for men in the Central African Republic to 87·6 years (86·9-88·1) among women in Singapore. The greatest progress across age groups was for children younger than 5 years; under-5 mortality dropped from 216·0 deaths (196·3-238·1) per 1000 livebirths in 1950 to 38·9 deaths (35·6-42·83) per 1000 livebirths in 2017, with huge reductions across countries. Nevertheless, there were still 5·4 million (5·2-5·6) deaths among children younger than 5 years in the world in 2017. Progress has been less pronounced and more variable for adults, especially for adult males, who had stagnant or increasing mortality rates in several countries. The gap between male and female life expectancy between 1950 and 2017, while relatively stable at the global level, shows distinctive patterns across super-regions and has consistently been the largest in central Europe, eastern Europe, and central Asia, and smallest in south Asia. Performance was also variable across countries and time in observed mortality rates compared with those expected on the basis of development. INTERPRETATION This analysis of age-sex-specific mortality shows that there are remarkably complex patterns in population mortality across countries. The findings of this study highlight global successes, such as the large decline in under-5 mortality, which reflects significant local, national, and global commitment and investment over several decades. However, they also bring attention to mortality patterns that are a cause for concern, particularly among adult men and, to a lesser extent, women, whose mortality rates have stagnated in many countries over the time period of this study, and in some cases are increasing. FUNDING Bill & Melinda Gates Foundation.
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Zucker I, Zuhlke LJJ, Lim SS, Murray CJL. Measuring progress from 1990 to 2017 and projecting attainment to 2030 of the health-related Sustainable Development Goals for 195 countries and territories: a systematic analysis for the Global Burden of Disease Study 2017. Lancet 2018; 392:2091-2138. [PMID: 30496107 PMCID: PMC6227911 DOI: 10.1016/s0140-6736(18)32281-5] [Citation(s) in RCA: 264] [Impact Index Per Article: 44.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 09/06/2018] [Accepted: 09/12/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND Efforts to establish the 2015 baseline and monitor early implementation of the UN Sustainable Development Goals (SDGs) highlight both great potential for and threats to improving health by 2030. To fully deliver on the SDG aim of "leaving no one behind", it is increasingly important to examine the health-related SDGs beyond national-level estimates. As part of the Global Burden of Diseases, Injuries, and Risk Factors Study 2017 (GBD 2017), we measured progress on 41 of 52 health-related SDG indicators and estimated the health-related SDG index for 195 countries and territories for the period 1990-2017, projected indicators to 2030, and analysed global attainment. METHODS We measured progress on 41 health-related SDG indicators from 1990 to 2017, an increase of four indicators since GBD 2016 (new indicators were health worker density, sexual violence by non-intimate partners, population census status, and prevalence of physical and sexual violence [reported separately]). We also improved the measurement of several previously reported indicators. We constructed national-level estimates and, for a subset of health-related SDGs, examined indicator-level differences by sex and Socio-demographic Index (SDI) quintile. We also did subnational assessments of performance for selected countries. To construct the health-related SDG index, we transformed the value for each indicator on a scale of 0-100, with 0 as the 2·5th percentile and 100 as the 97·5th percentile of 1000 draws calculated from 1990 to 2030, and took the geometric mean of the scaled indicators by target. To generate projections through 2030, we used a forecasting framework that drew estimates from the broader GBD study and used weighted averages of indicator-specific and country-specific annualised rates of change from 1990 to 2017 to inform future estimates. We assessed attainment of indicators with defined targets in two ways: first, using mean values projected for 2030, and then using the probability of attainment in 2030 calculated from 1000 draws. We also did a global attainment analysis of the feasibility of attaining SDG targets on the basis of past trends. Using 2015 global averages of indicators with defined SDG targets, we calculated the global annualised rates of change required from 2015 to 2030 to meet these targets, and then identified in what percentiles the required global annualised rates of change fell in the distribution of country-level rates of change from 1990 to 2015. We took the mean of these global percentile values across indicators and applied the past rate of change at this mean global percentile to all health-related SDG indicators, irrespective of target definition, to estimate the equivalent 2030 global average value and percentage change from 2015 to 2030 for each indicator. FINDINGS The global median health-related SDG index in 2017 was 59·4 (IQR 35·4-67·3), ranging from a low of 11·6 (95% uncertainty interval 9·6-14·0) to a high of 84·9 (83·1-86·7). SDG index values in countries assessed at the subnational level varied substantially, particularly in China and India, although scores in Japan and the UK were more homogeneous. Indicators also varied by SDI quintile and sex, with males having worse outcomes than females for non-communicable disease (NCD) mortality, alcohol use, and smoking, among others. Most countries were projected to have a higher health-related SDG index in 2030 than in 2017, while country-level probabilities of attainment by 2030 varied widely by indicator. Under-5 mortality, neonatal mortality, maternal mortality ratio, and malaria indicators had the most countries with at least 95% probability of target attainment. Other indicators, including NCD mortality and suicide mortality, had no countries projected to meet corresponding SDG targets on the basis of projected mean values for 2030 but showed some probability of attainment by 2030. For some indicators, including child malnutrition, several infectious diseases, and most violence measures, the annualised rates of change required to meet SDG targets far exceeded the pace of progress achieved by any country in the recent past. We found that applying the mean global annualised rate of change to indicators without defined targets would equate to about 19% and 22% reductions in global smoking and alcohol consumption, respectively; a 47% decline in adolescent birth rates; and a more than 85% increase in health worker density per 1000 population by 2030. INTERPRETATION The GBD study offers a unique, robust platform for monitoring the health-related SDGs across demographic and geographic dimensions. Our findings underscore the importance of increased collection and analysis of disaggregated data and highlight where more deliberate design or targeting of interventions could accelerate progress in attaining the SDGs. Current projections show that many health-related SDG indicators, NCDs, NCD-related risks, and violence-related indicators will require a concerted shift away from what might have driven past gains-curative interventions in the case of NCDs-towards multisectoral, prevention-oriented policy action and investments to achieve SDG aims. Notably, several targets, if they are to be met by 2030, demand a pace of progress that no country has achieved in the recent past. The future is fundamentally uncertain, and no model can fully predict what breakthroughs or events might alter the course of the SDGs. What is clear is that our actions-or inaction-today will ultimately dictate how close the world, collectively, can get to leaving no one behind by 2030. FUNDING Bill & Melinda Gates Foundation.
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Sambala EZ, Samy AM, Sanabria J, Sanchez-Niño MD, Santos IS, Santric Milicevic MM, Sao Jose BP, Sardana M, Sarker AR, Sarmiento-Suárez R, Saroshe S, Sarrafzadegan N, Sartorius B, Sarvi S, Sathian B, Satpathy M, Sawant AR, Sawhney M, Saxena S, Schaeffner E, Schelonka K, Schneider IJC, Schwebel DC, Schwendicke F, Seedat S, Sekerija M, Sepanlou SG, Serván-Mori E, Shabaninejad H, Shackelford KA, Shafieesabet A, Shaheen AA, Shaikh MA, Shakir RA, Shams-Beyranvand M, Shamsi M, Shamsizadeh M, Sharafi H, Sharafi K, Sharif M, Sharif-Alhoseini M, Sharma J, Sharma R, She J, Sheikh A, Shi P, Shibuya K, Shigematsu M, Shiri R, Shirkoohi R, Shiue I, Shokraneh F, Shukla SR, Si S, Siabani S, Sibai AM, Siddiqi TJ, Sigfusdottir ID, Sigurvinsdottir R, Silpakit N, Silva DAS, Silva JP, Silveira DGA, Singam NSV, Singh JA, Singh NP, Singh V, Sinha DN, Sliwa K, Soares Filho AM, Sobaih BH, Sobhani S, Soofi M, Soriano JB, Soyiri IN, Sreeramareddy CT, Starodubov VI, Steiner C, Stewart LG, Stokes MA, Strong M, Subart ML, Sufiyan MB, Sulo G, Sunguya BF, Sur PJ, Sutradhar I, Sykes BL, Sylaja PN, Sylte DO, Szoeke CEI, Tabarés-Seisdedos R, Tabb KM, Tadakamadla SK, Tandon N, Tassew AA, Tassew SG, Taveira N, Tawye NY, Tehrani-Banihashemi A, Tekalign TG, Tekle MG, Temsah MH, Terkawi AS, Teshale MY, Tessema B, Teweldemedhin M, Thakur JS, Thankappan KR, Thirunavukkarasu S, Thomas N, Thomson AJ, Tilahun B, To QG, Tonelli M, Topor-Madry R, Torre AE, Tortajada-Girbés M, Tovani-Palone MR, Toyoshima H, Tran BX, Tran KB, Tripathy SP, Truelsen TC, Truong NT, Tsadik AG, Tsegay A, Tsilimparis N, Tudor Car L, Ukwaja KN, Ullah I, Usman MS, Uthman OA, Uzun SB, Vaduganathan M, Vaezi A, Vaidya G, Valdez PR, Varavikova E, Varughese S, Vasankari TJ, Vasconcelos AMN, Venketasubramanian N, Villafaina S, Violante FS, Vladimirov SK, Vlassov V, Vollset SE, Vos T, Vosoughi K, Vujcic IS, Wagnew FS, Waheed Y, Walson JL, Wang Y, Wang YP, Weiderpass E, Weintraub RG, Weldegwergs KG, Werdecker A, Westerman R, Whiteford H, Widecka J, Widecka K, Wijeratne T, Winkler AS, Wiysonge CS, Wolfe CDA, Wu S, Wyper GMA, Xu G, Yamada T, Yano Y, Yaseri M, Yasin YJ, Ye P, Yentür GK, Yeshaneh A, Yimer EM, Yip P, Yisma E, Yonemoto N, Yoon SJ, Yotebieng M, Younis MZ, Yousefifard M, Yu C, Zadnik V, Zaidi Z, Zaman SB, Zamani M, Zare Z, Zeleke MM, Zenebe ZM, Zerfu TA, Zhang X, Zhao XJ, Zhou M, Zhu J, Zimsen SRM, Zodpey S, Zoeckler L, Lopez AD, Lim SS. Population and fertility by age and sex for 195 countries and territories, 1950-2017: a systematic analysis for the Global Burden of Disease Study 2017. Lancet 2018; 392:1995-2051. [PMID: 30496106 PMCID: PMC6227915 DOI: 10.1016/s0140-6736(18)32278-5] [Citation(s) in RCA: 243] [Impact Index Per Article: 40.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Revised: 09/07/2018] [Accepted: 09/12/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND Population estimates underpin demographic and epidemiological research and are used to track progress on numerous international indicators of health and development. To date, internationally available estimates of population and fertility, although useful, have not been produced with transparent and replicable methods and do not use standardised estimates of mortality. We present single-calendar year and single-year of age estimates of fertility and population by sex with standardised and replicable methods. METHODS We estimated population in 195 locations by single year of age and single calendar year from 1950 to 2017 with standardised and replicable methods. We based the estimates on the demographic balancing equation, with inputs of fertility, mortality, population, and migration data. Fertility data came from 7817 location-years of vital registration data, 429 surveys reporting complete birth histories, and 977 surveys and censuses reporting summary birth histories. We estimated age-specific fertility rates (ASFRs; the annual number of livebirths to women of a specified age group per 1000 women in that age group) by use of spatiotemporal Gaussian process regression and used the ASFRs to estimate total fertility rates (TFRs; the average number of children a woman would bear if she survived through the end of the reproductive age span [age 10-54 years] and experienced at each age a particular set of ASFRs observed in the year of interest). Because of sparse data, fertility at ages 10-14 years and 50-54 years was estimated from data on fertility in women aged 15-19 years and 45-49 years, through use of linear regression. Age-specific mortality data came from the Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2017 estimates. Data on population came from 1257 censuses and 761 population registry location-years and were adjusted for underenumeration and age misreporting with standard demographic methods. Migration was estimated with the GBD Bayesian demographic balancing model, after incorporating information about refugee migration into the model prior. Final population estimates used the cohort-component method of population projection, with inputs of fertility, mortality, and migration data. Population uncertainty was estimated by use of out-of-sample predictive validity testing. With these data, we estimated the trends in population by age and sex and in fertility by age between 1950 and 2017 in 195 countries and territories. FINDINGS From 1950 to 2017, TFRs decreased by 49·4% (95% uncertainty interval [UI] 46·4-52·0). The TFR decreased from 4·7 livebirths (4·5-4·9) to 2·4 livebirths (2·2-2·5), and the ASFR of mothers aged 10-19 years decreased from 37 livebirths (34-40) to 22 livebirths (19-24) per 1000 women. Despite reductions in the TFR, the global population has been increasing by an average of 83·8 million people per year since 1985. The global population increased by 197·2% (193·3-200·8) since 1950, from 2·6 billion (2·5-2·6) to 7·6 billion (7·4-7·9) people in 2017; much of this increase was in the proportion of the global population in south Asia and sub-Saharan Africa. The global annual rate of population growth increased between 1950 and 1964, when it peaked at 2·0%; this rate then remained nearly constant until 1970 and then decreased to 1·1% in 2017. Population growth rates in the southeast Asia, east Asia, and Oceania GBD super-region decreased from 2·5% in 1963 to 0·7% in 2017, whereas in sub-Saharan Africa, population growth rates were almost at the highest reported levels ever in 2017, when they were at 2·7%. The global average age increased from 26·6 years in 1950 to 32·1 years in 2017, and the proportion of the population that is of working age (age 15-64 years) increased from 59·9% to 65·3%. At the national level, the TFR decreased in all countries and territories between 1950 and 2017; in 2017, TFRs ranged from a low of 1·0 livebirths (95% UI 0·9-1·2) in Cyprus to a high of 7·1 livebirths (6·8-7·4) in Niger. The TFR under age 25 years (TFU25; number of livebirths expected by age 25 years for a hypothetical woman who survived the age group and was exposed to current ASFRs) in 2017 ranged from 0·08 livebirths (0·07-0·09) in South Korea to 2·4 livebirths (2·2-2·6) in Niger, and the TFR over age 30 years (TFO30; number of livebirths expected for a hypothetical woman ageing from 30 to 54 years who survived the age group and was exposed to current ASFRs) ranged from a low of 0·3 livebirths (0·3-0·4) in Puerto Rico to a high of 3·1 livebirths (3·0-3·2) in Niger. TFO30 was higher than TFU25 in 145 countries and territories in 2017. 33 countries had a negative population growth rate from 2010 to 2017, most of which were located in central, eastern, and western Europe, whereas population growth rates of more than 2·0% were seen in 33 of 46 countries in sub-Saharan Africa. In 2017, less than 65% of the national population was of working age in 12 of 34 high-income countries, and less than 50% of the national population was of working age in Mali, Chad, and Niger. INTERPRETATION Population trends create demographic dividends and headwinds (ie, economic benefits and detriments) that affect national economies and determine national planning needs. Although TFRs are decreasing, the global population continues to grow as mortality declines, with diverse patterns at the national level and across age groups. To our knowledge, this is the first study to provide transparent and replicable estimates of population and fertility, which can be used to inform decision making and to monitor progress. FUNDING Bill & Melinda Gates Foundation.
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Platts-Mills JA, Liu J, Rogawski ET, Kabir F, Lertsethtakarn P, Siguas M, Khan SS, Praharaj I, Murei A, Nshama R, Mujaga B, Havt A, Maciel IA, McMurry TL, Operario DJ, Taniuchi M, Gratz J, Stroup SE, Roberts JH, Kalam A, Aziz F, Qureshi S, Islam MO, Sakpaisal P, Silapong S, Yori PP, Rajendiran R, Benny B, McGrath M, McCormick BJJ, Seidman JC, Lang D, Gottlieb M, Guerrant RL, Lima AAM, Leite JP, Samie A, Bessong PO, Page N, Bodhidatta L, Mason C, Shrestha S, Kiwelu I, Mduma ER, Iqbal NT, Bhutta ZA, Ahmed T, Haque R, Kang G, Kosek MN, Houpt ER. Use of quantitative molecular diagnostic methods to assess the aetiology, burden, and clinical characteristics of diarrhoea in children in low-resource settings: a reanalysis of the MAL-ED cohort study. Lancet Glob Health 2018; 6:e1309-e1318. [PMID: 30287127 PMCID: PMC6227251 DOI: 10.1016/s2214-109x(18)30349-8] [Citation(s) in RCA: 215] [Impact Index Per Article: 35.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 06/28/2018] [Accepted: 07/11/2018] [Indexed: 12/17/2022]
Abstract
Background Optimum management of childhood diarrhoea in low-resource settings has been hampered by insufficient data on aetiology, burden, and associated clinical characteristics. We used quantitative diagnostic methods to reassess and refine estimates of diarrhoea aetiology from the Etiology, Risk Factors, and Interactions of Enteric Infections and Malnutrition and the Consequences for Child Health and Development (MAL-ED) cohort study. Methods We re-analysed stool specimens from the multisite MAL-ED cohort study of children aged 0–2 years done at eight locations (Dhaka, Bangladesh; Vellore, India; Bhaktapur, Nepal; Naushero Feroze, Pakistan; Venda, South Africa; Haydom, Tanzania; Fortaleza, Brazil; and Loreto, Peru), which included active surveillance for diarrhoea and routine non-diarrhoeal stool collection. We used quantitative PCR to test for 29 enteropathogens, calculated population-level pathogen-specific attributable burdens, derived stringent quantitative cutoffs to identify aetiology for individual episodes, and created aetiology prediction scores using clinical characteristics. Findings We analysed 6625 diarrhoeal and 30 968 non-diarrhoeal surveillance stools from 1715 children. Overall, 64·9% of diarrhoea episodes (95% CI 62·6–71·2) could be attributed to an aetiology by quantitative PCR compared with 32·8% (30·8–38·7) using the original study microbiology. Viral diarrhoea (36·4% of overall incidence, 95% CI 33·6–39·5) was more common than bacterial (25·0%, 23·4–28·4) and parasitic diarrhoea (3·5%, 3·0–5·2). Ten pathogens accounted for 95·7% of attributable diarrhoea: Shigella (26·1 attributable episodes per 100 child-years, 95% CI 23·8–29·9), sapovirus (22·8, 18·9–27·5), rotavirus (20·7, 18·8–23·0), adenovirus 40/41 (19·0, 16·8–23·0), enterotoxigenic Escherichia coli (18·8, 16·5–23·8), norovirus (15·4, 13·5–20·1), astrovirus (15·0, 12·0–19·5), Campylobacter jejuni or C coli (12·1, 8·5–17·2), Cryptosporidium (5·8, 4·3–8·3), and typical enteropathogenic E coli (5·4, 2·8–9·3). 86·2% of the attributable incidence for Shigella was non-dysenteric. A prediction score for shigellosis was more accurate (sensitivity 50·4% [95% CI 46·7–54·1], specificity 84·0% [83·0–84·9]) than current guidelines, which recommend treatment only of bloody diarrhoea to cover Shigella (sensitivity 14·5% [95% CI 12·1–17·3], specificity 96·5% [96·0–97·0]). Interpretation Quantitative molecular diagnostics improved estimates of pathogen-specific burdens of childhood diarrhoea in the community setting. Viral causes predominated, including a substantial burden of sapovirus; however, Shigella had the highest overall burden with a high incidence in the second year of life. These data could improve the management of diarrhoea in these low-resource settings. Funding Bill & Melinda Gates Foundation.
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Affiliation(s)
- James A Platts-Mills
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, USA.
| | - Jie Liu
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, USA
| | - Elizabeth T Rogawski
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, USA; Department of Public Health Sciences, University of Virginia, Charlottesville, VA, USA
| | | | | | | | - Shaila S Khan
- International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh
| | | | | | | | - Buliga Mujaga
- Kilimanjaro Clinical Research Institute, Moshi, Tanzania
| | | | | | - Timothy L McMurry
- Department of Public Health Sciences, University of Virginia, Charlottesville, VA, USA
| | - Darwin J Operario
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, USA
| | - Mami Taniuchi
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, USA
| | - Jean Gratz
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, USA
| | - Suzanne E Stroup
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, USA
| | - James H Roberts
- Department of Public Health Sciences, University of Virginia, Charlottesville, VA, USA
| | | | | | | | - M Ohedul Islam
- International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh
| | - Pimmada Sakpaisal
- Armed Forces Research Institute of Medical Sciences (AFRIMS), Bangkok, Thailand
| | - Sasikorn Silapong
- Armed Forces Research Institute of Medical Sciences (AFRIMS), Bangkok, Thailand
| | - Pablo P Yori
- Asociación Benéfica PRISMA, Iquitos, Peru; Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | | | | | - Monica McGrath
- Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA; Fogarty International Center, National Institutes of Health, Bethesda, MD, USA
| | | | - Jessica C Seidman
- Fogarty International Center, National Institutes of Health, Bethesda, MD, USA
| | - Dennis Lang
- Foundation for the National Institutes of Health, Bethesda, MD, USA
| | - Michael Gottlieb
- Foundation for the National Institutes of Health, Bethesda, MD, USA
| | - Richard L Guerrant
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, USA
| | | | | | | | | | - Nicola Page
- National Institute for Communicable Diseases, Johannesburg, South Africa
| | - Ladaporn Bodhidatta
- Armed Forces Research Institute of Medical Sciences (AFRIMS), Bangkok, Thailand
| | - Carl Mason
- Armed Forces Research Institute of Medical Sciences (AFRIMS), Bangkok, Thailand
| | - Sanjaya Shrestha
- Walter Reed/AFRIMS Research Unit, Nepal, Kathmandu, Nepal; University of Bergen, Bergen, Norway
| | - Ireen Kiwelu
- Kilimanjaro Clinical Research Institute, Moshi, Tanzania
| | | | | | | | - Tahmeed Ahmed
- International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh
| | - Rashidul Haque
- International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh
| | | | - Margaret N Kosek
- Asociación Benéfica PRISMA, Iquitos, Peru; Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - Eric R Houpt
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, USA
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Rogawski ET, Liu J, Platts-Mills JA, Kabir F, Lertsethtakarn P, Siguas M, Khan SS, Praharaj I, Murei A, Nshama R, Mujaga B, Havt A, Maciel IA, Operario DJ, Taniuchi M, Gratz J, Stroup SE, Roberts JH, Kalam A, Aziz F, Qureshi S, Islam MO, Sakpaisal P, Silapong S, Yori PP, Rajendiran R, Benny B, McGrath M, Seidman JC, Lang D, Gottlieb M, Guerrant RL, Lima AAM, Leite JP, Samie A, Bessong PO, Page N, Bodhidatta L, Mason C, Shrestha S, Kiwelu I, Mduma ER, Iqbal NT, Bhutta ZA, Ahmed T, Haque R, Kang G, Kosek MN, Houpt ER. Use of quantitative molecular diagnostic methods to investigate the effect of enteropathogen infections on linear growth in children in low-resource settings: longitudinal analysis of results from the MAL-ED cohort study. Lancet Glob Health 2018; 6:e1319-e1328. [PMID: 30287125 PMCID: PMC6227248 DOI: 10.1016/s2214-109x(18)30351-6] [Citation(s) in RCA: 213] [Impact Index Per Article: 35.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 06/28/2018] [Accepted: 07/11/2018] [Indexed: 12/15/2022]
Abstract
BACKGROUND Enteropathogen infections in early childhood not only cause diarrhoea but contribute to poor growth. We used molecular diagnostics to assess whether particular enteropathogens were associated with linear growth across seven low-resource settings. METHODS We used quantitative PCR to detect 29 enteropathogens in diarrhoeal and non-diarrhoeal stools collected from children in the first 2 years of life obtained during the Etiology, Risk Factors, and Interactions of Enteric Infections and Malnutrition and the Consequences for Child Health and Development (MAL-ED) multisite cohort study. Length was measured monthly. We estimated associations between aetiology-specific diarrhoea and subclinical enteropathogen infection and quantity and attained length in 3 month intervals, at age 2 and 5 years, and used a longitudinal model to account for temporality and time-dependent confounding. FINDINGS Among 1469 children who completed 2 year follow-up, 35 622 stool samples were tested and yielded valid results. Diarrhoeal episodes attributed to bacteria and parasites, but not viruses, were associated with small decreases in length after 3 months and at age 2 years. Substantial decrements in length at 2 years were associated with subclinical, non-diarrhoeal, infection with Shigella (length-for-age Z score [LAZ] reduction -0·14, 95% CI -0·27 to -0·01), enteroaggregative Escherichia coli (-0·21, -0·37 to -0·05), Campylobacter (-0·17, -0·32 to -0·01), and Giardia (-0·17, -0·30 to -0·05). Norovirus, Cryptosporidium, typical enteropathogenic E coli, and Enterocytozoon bieneusi were also associated with small decrements in LAZ. Shigella and E bieneusi were associated with the largest decreases in LAZ per log increase in quantity per g of stool (-0·13 LAZ, 95% CI -0·22 to -0·03 for Shigella; -0·14, -0·26 to -0·02 for E bieneusi). Based on these models, interventions that successfully decrease exposure to Shigella, enteroaggregative E coli, Campylobacter, and Giardia could increase mean length of children by 0·12-0·37 LAZ (0·4-1·2 cm) at the MAL-ED sites. INTERPRETATION Subclinical infection and quantity of pathogens, particularly Shigella, enteroaggregative E coli, Campylobacter, and Giardia, had a substantial negative association with linear growth, which was sustained during the first 2 years of life, and in some cases, to 5 years. Successfully reducing exposure to certain pathogens might reduce global stunting. FUNDING Bill & Melinda Gates Foundation.
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Affiliation(s)
- Elizabeth T Rogawski
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, USA; Department of Public Health Sciences, University of Virginia, Charlottesville, VA, USA
| | - Jie Liu
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, USA
| | - James A Platts-Mills
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, USA
| | | | | | | | - Shaila S Khan
- International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh
| | | | | | | | - Buliga Mujaga
- Kilimanjaro Clinical Research Institute, Moshi, Tanzania
| | | | | | - Darwin J Operario
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, USA
| | - Mami Taniuchi
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, USA
| | - Jean Gratz
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, USA
| | - Suzanne E Stroup
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, USA
| | - James H Roberts
- Department of Public Health Sciences, University of Virginia, Charlottesville, VA, USA
| | | | | | | | - M Ohedul Islam
- International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh
| | - Pimmada Sakpaisal
- Armed Forces Research Institute of Medical Sciences (AFRIMS), Bangkok, Thailand
| | - Sasikorn Silapong
- Armed Forces Research Institute of Medical Sciences (AFRIMS), Bangkok, Thailand
| | - Pablo P Yori
- Asociación Benéfica PRISMA, Iquitos, Peru; Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | | | | | - Monica McGrath
- Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA; Fogarty International Center, National Institutes of Health, Bethesda, MD, USA
| | - Jessica C Seidman
- Fogarty International Center, National Institutes of Health, Bethesda, MD, USA
| | - Dennis Lang
- Foundation for the National Institutes of Health, Bethesda, MD, USA
| | - Michael Gottlieb
- Foundation for the National Institutes of Health, Bethesda, MD, USA
| | - Richard L Guerrant
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, USA
| | | | | | | | | | - Nicola Page
- National Institute for Communicable Diseases, Johannesburg, South Africa
| | - Ladaporn Bodhidatta
- Fogarty International Center, National Institutes of Health, Bethesda, MD, USA
| | - Carl Mason
- Armed Forces Research Institute of Medical Sciences (AFRIMS), Bangkok, Thailand
| | - Sanjaya Shrestha
- Walter Reed/AFRIMS Research Unit, Nepal, Kathmandu, Nepal; University of Bergen, Bergen, Norway
| | - Ireen Kiwelu
- Kilimanjaro Clinical Research Institute, Moshi, Tanzania
| | | | | | | | - Tahmeed Ahmed
- International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh
| | - Rashidul Haque
- International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh
| | | | - Margaret N Kosek
- Asociación Benéfica PRISMA, Iquitos, Peru; Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA
| | - Eric R Houpt
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, VA, USA.
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Church JA, Parker EPK, Kosek MN, Kang G, Grassly NC, Kelly P, Prendergast AJ. Exploring the relationship between environmental enteric dysfunction and oral vaccine responses. Future Microbiol 2018; 13:1055-1070. [PMID: 29926747 PMCID: PMC6136084 DOI: 10.2217/fmb-2018-0016] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [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] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 03/26/2018] [Indexed: 12/11/2022] Open
Abstract
Oral vaccines significantly underperform in low-income countries. One possible contributory factor is environmental enteric dysfunction (EED), a subclinical disorder of small intestinal structure and function among children living in poverty. Here, we review studies describing oral vaccine responses and EED. We identified eight studies evaluating EED and oral vaccine responses. There was substantial heterogeneity in study design and few consistent trends emerged. Four studies reported a negative association between EED and oral vaccine responses; two showed no significant association; and two described a positive correlation. Current evidence is therefore insufficient to determine whether EED contributes to oral vaccine underperformance. We identify roadblocks in the field and future research needs, including carefully designed studies those can investigate this hypothesis further.
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Affiliation(s)
- James A Church
- Zvitambo Institute for Maternal & Child Health Research, Harare, Zimbabwe
- Centre for Genomics & Child Health, Blizard Institute, Queen Mary University of London, UK
| | - Edward PK Parker
- Department of Infectious Disease Epidemiology, St Mary's Campus, Imperial College London, London, UK
| | - Margaret N Kosek
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA
| | - Gagandeep Kang
- Department of Gastrointestinal Sciences, Christian Medical College, Vellore, Tamil Nadu, India
| | - Nicholas C Grassly
- Department of Infectious Disease Epidemiology, St Mary's Campus, Imperial College London, London, UK
| | - Paul Kelly
- Centre for Genomics & Child Health, Blizard Institute, Queen Mary University of London, UK
- Tropical Gastroenterology & Nutrition group, University of Zambia School of Medicine, Lusaka, Zambia
| | - Andrew J Prendergast
- Zvitambo Institute for Maternal & Child Health Research, Harare, Zimbabwe
- Centre for Genomics & Child Health, Blizard Institute, Queen Mary University of London, UK
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA
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Lee GO, Surkan PJ, Zelner J, Paredes Olórtegui M, Peñataro Yori P, Ambikapathi R, Caulfield LE, Gilman RH, Kosek MN. Social connectedness is associated with food security among peri-urban Peruvian Amazonian communities. SSM Popul Health 2018; 4:254-262. [PMID: 29854909 PMCID: PMC5976826 DOI: 10.1016/j.ssmph.2018.02.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Revised: 02/14/2018] [Accepted: 02/15/2018] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Food insecurity is a major global public health issue. Social capital has been identified as central to maintaining food security across a wide range of low- and middle-income country contexts, but few studies have examined this relationship through sociocentric network analysis. OBJECTIVE We investigated relationships between household- and community-level social connectedness, household food security, and household income; and tested the hypothesis that social connectedness modified the relationship between income and food security. METHODS A cross-sectional census with an embedded questionnaire to capture social relationships was conducted among eleven peri-urban communities. Community connectedness was related to study outcomes of food security and per-capita income through regression models. RESULTS Of 1520 households identified, 1383 were interviewed (91.0%) and 1272 (83.9%) provided complete data. Households in the youngest communities had the most total contacts, and the highest proportion of contacts outside of the community. Household income was also associated with more outside-community contacts (0.05 more contacts per standard deviation increase in income, p<0.001).Less food secure households reported more contacts nearby (0.24 increase in household food insecurity access scale (HFIAS) for each additional contact, p<0.001). After adjusting for household-level socioeconomic status, membership in an older, larger, and better-connected community, with a greater proportion of residents engaged in rural livelihood strategies, was associated with greater food security (-0.92 decrease in HFIAS for each one-unit increase in community mean degree, p=0.008). There was no evidence that social connectedness modified the relationship between income and food security such that lower-income households benefited more from community membership than higher-income households. CONCLUSIONS Although households reported networks that spanned rural villages and urban centers, contacts within the community, with whom food was regularly shared, were most important to maintaining food security. Interventions that build within-community connectedness in peri-urban settings may increase food security.
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Affiliation(s)
- Gwenyth O. Lee
- Department of Epidemiology, School of Public Health, University of Michigan, M5071 SPH II, 1415 Washington Heights, Ann Arbor, MI 48109-2029, USA
| | - Pamela J. Surkan
- Department of International Health, the Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Jon Zelner
- Department of Epidemiology, School of Public Health, University of Michigan, M5071 SPH II, 1415 Washington Heights, Ann Arbor, MI 48109-2029, USA
| | | | - Pablo Peñataro Yori
- Department of International Health, the Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Ramya Ambikapathi
- Department of Global and Population, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Laura E. Caulfield
- Department of International Health, the Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Robert H. Gilman
- Department of International Health, the Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Margaret N. Kosek
- Department of International Health, the Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
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Exum NG, Lee GO, Olórtegui MP, Yori PP, Salas MS, Trigoso DR, Colston JM, Schwab KJ, McCormick BJJ, Kosek MN. A Longitudinal Study of Household Water, Sanitation, and Hygiene Characteristics and Environmental Enteropathy Markers in Children Less than 24 Months in Iquitos, Peru. Am J Trop Med Hyg 2018; 98:995-1004. [PMID: 29436350 PMCID: PMC5928816 DOI: 10.4269/ajtmh.17-0464] [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] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Poor child gut health, resulting from a lack of access to an improved toilet or clean water, has been proposed as a biological mechanism underlying child stunting and oral vaccine failure. Characteristics related to household sanitation, water use, and hygiene were measured among a birth cohort of 270 children from peri-urban Iquitos Peru. These children had monthly stool samples and urine samples at four time points and serum samples at (2–4) time points analyzed for biomarkers related to intestinal inflammation and permeability. We found that less storage of fecal matter near the household along with a reliable water connection were associated with reduced inflammation, most prominently the fecal biomarker myeloperoxidase (MPO) (no sanitation facility compared with those with an onsite toilet had −0.43 log MPO, 95% confidence interval [CI]: −0.74, −0.13; and households with an intermittent connection versus those with a continuous supply had +0.36 log MPO, 95% CI: 0.08, 0.63). These results provide preliminary evidence for the hypothesis that children less than 24 months of age living in unsanitary conditions will have elevated gut inflammation.
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Affiliation(s)
- Natalie G Exum
- Department of Environmental Health and Engineering, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland
| | - Gwenyth O Lee
- Department of Epidemiology, University of Michigan, Ann Arbor, Michigan
| | - Maribel Paredes Olórtegui
- Asociación Benéfica Proyectos de Informática, Salud, Medicina, y Agricultura (A.B. PRISMA), Iquitos, Peru.,Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Pablo Peñataro Yori
- Asociación Benéfica Proyectos de Informática, Salud, Medicina, y Agricultura (A.B. PRISMA), Iquitos, Peru.,Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Mery Siguas Salas
- Asociación Benéfica Proyectos de Informática, Salud, Medicina, y Agricultura (A.B. PRISMA), Iquitos, Peru
| | - Dixner Rengifo Trigoso
- Asociación Benéfica Proyectos de Informática, Salud, Medicina, y Agricultura (A.B. PRISMA), Iquitos, Peru
| | - Josh M Colston
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Kellogg J Schwab
- Department of Epidemiology, University of Michigan, Ann Arbor, Michigan
| | | | - Margaret N Kosek
- Asociación Benéfica Proyectos de Informática, Salud, Medicina, y Agricultura (A.B. PRISMA), Iquitos, Peru.,Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
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69
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François R, Yori PP, Rouhani S, Siguas Salas M, Paredes Olortegui M, Rengifo Trigoso D, Pisanic N, Burga R, Meza R, Meza Sanchez G, Gregory MJ, Houpt ER, Platts-Mills JA, Kosek MN. The other Campylobacters: Not innocent bystanders in endemic diarrhea and dysentery in children in low-income settings. PLoS Negl Trop Dis 2018; 12:e0006200. [PMID: 29415075 PMCID: PMC5819825 DOI: 10.1371/journal.pntd.0006200] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [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: 09/22/2017] [Revised: 02/20/2018] [Accepted: 12/31/2017] [Indexed: 12/13/2022] Open
Abstract
Background Campylobacter is one of the main causes of gastroenteritis worldwide. Most of the current knowledge about the epidemiology of this food-borne infection concerns two species, C. coli and C. jejuni. Recent studies conducted in developing countries and using novel diagnostic techniques have generated evidence of the increasing burden and importance of other Campylobacter species, i.e. non-C. coli/jejuni. We performed a nested case-control study to compare the prevalence of C. coli/jejuni and other Campylobacter in children with clinical dysentery and severe diarrhea as well as without diarrhea to better understand the clinical importance of infections with Campylobacter species other than C. coli/jejuni. Methodology/Principal findings Our nested case-control study of 439 stool samples included dysenteric stools, stools collected during severe diarrhea episodes, and asymptomatic stools which were systematically selected to be representative of clinical phenotypes from 9,160 stools collected during a birth cohort study of 201 children followed until two years of age. Other Campylobacter accounted for 76.4% of the 216 Campylobacter detections by qPCR and were more prevalent than C. coli/jejuni across all clinical groups. Other Campylobacter were also more prevalent than C. coli/jejuni across all age groups, with older children bearing a higher burden of other Campylobacter. Biomarkers of intestinal inflammation and injury (methylene blue, fecal occult test, myeloperoxidase or MPO) showed a strong association with dysentery, but mixed results with infection. MPO levels were generally higher among children infected with C. coli/jejuni, but Shigella-infected children suffering from dysentery recorded the highest levels (26,224 ng/mL); the lowest levels (10,625 ng/mL) were among asymptomatic children infected with other Campylobacter. Adjusting for age, sex, and Shigella infection, dysentery was significantly associated with C. coli/jejuni but not with other Campylobacter, whereas severe diarrhea was significantly associated with both C. coli/jejuni and other Campylobacter. Compared to asymptomatic children, children suffering from dysentery had a 14.6 odds of C. coli/jejuni infection (p-value < 0.001, 95% CI 5.5–38.7) but were equally likely to have other Campylobacter infections–odds ratio of 1.3 (0.434, 0.7–2.4). Children suffering from severe diarrhea were more likely than asymptomatic children to test positive for both C. coli/jejuni and other Campylobacter–OR of 2.8 (0.034, 1.1–7.1) and 1.9 (0.018, 1.1–3.1), respectively. Compared to the Campylobacter-free group, the odds of all diarrhea given C. coli/jejuni infection and other Campylobacter infection were 8.8 (<0.001, 3.0–25.7) and 2.4 (0.002, 1.4–4.2), respectively. Eliminating other Campylobacter in this population would eliminate 24.9% of the diarrhea cases, which is almost twice the population attributable fraction of 15.1% due to C. coli/jejuni. Conclusions/Significance Eighty-seven percent of the dysentery and 59.5% of the severe diarrhea samples were positive for Campylobacter, Shigella, or both, emphasizing the importance of targeting these pathogens to limit the impact of dysentery and severe diarrhea in children. Notably, the higher prevalence of other Campylobacter compared to C. coli/jejuni, their increasing burden during early childhood, and their association with severe diarrhea highlight the importance of these non-C. coli/jejuni Campylobacter species and suggest a need to clarify their importance in the etiology of clinical disease across different epidemiological contexts. Campylobacter is a major public health concern in developed and developing countries. C. coli and C. jejuni have long been considered to be the major disease-causing species, and clinical microbiologic approaches target these two species. However, less selective diagnostic approaches have shown the increasing importance of other Campylobacter species (i.e. non-C. coli/jejuni). Our case-control study investigated the association between diarrhea, C. coli/jejuni, and other Campylobacter among 439 stool samples from 201 children in peri-urban communities in Loreto, Peru. Three quarters of the 216 Campylobacter detections were associated with other Campylobacter, whose prevalence increased with age and was greater than that of C. coli/jejuni in all age and clinical groups (dysentery, severe diarrhea, and asymptomatic). Despite their lower prevalence, C. coli/jejuni were more strongly associated with higher levels of myeloperoxidase, clinical dysentery, and the presence of leukocytes and blood in the stool compared to other Campylobacter. Other Campylobacter were equally likely as C. coli/jejuni to be detected in severe diarrhea cases–odds ratio of 1.9 (p-value = 0.018, 95% CI 1.1–3.1) and 2.8 (0.034, 1.1–7.1), respectively. Removing C. coli/jejuni in this population would eliminate 15.1% of diarrhea compared to 24.9% if other Campylobacter were eliminated.
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Affiliation(s)
- Ruthly François
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
| | - Pablo Peñataro Yori
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
- Biomedical Research, Asociación Benéfica PRISMA, Iquitos, Peru
| | - Saba Rouhani
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
| | | | | | | | - Nora Pisanic
- Department of Environmental Health and Engineering, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
| | - Rosa Burga
- Bacteriology Department, Naval Medical Research Unit-6 (NAMRU-6), Lima, Peru
| | - Rina Meza
- Bacteriology Department, Naval Medical Research Unit-6 (NAMRU-6), Lima, Peru
| | - Graciela Meza Sanchez
- Facultad de Medicina Humana, Universidad Nacional de la Amazonía Peruana, Iquitos, Peru
| | - Michael J. Gregory
- Bacteriology Department, Naval Medical Research Unit-6 (NAMRU-6), Lima, Peru
| | - Eric R. Houpt
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, United States of America
| | - James A. Platts-Mills
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, United States of America
| | - Margaret N. Kosek
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, United States of America
- Biomedical Research, Asociación Benéfica PRISMA, Iquitos, Peru
- Division of Infectious Diseases, Johns Hopkins School of Medicine, Baltimore, United States of America
- * E-mail:
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70
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Richard SA, McCormick BJJ, Seidman JC, Rasmussen Z, Kosek MN, Rogawski ET, Petri W, Bose A, Mduma E, Maciel BLL, Chandyo RK, Bhutta Z, Turab A, Bessong P, Mahfuz M, Caulfield LE, On Behalf Of The Mal-Ed Network Investigators. Relationships among Common Illness Symptoms and the Protective Effect of Breastfeeding in Early Childhood in MAL-ED: An Eight-Country Cohort Study. Am J Trop Med Hyg 2018; 98:904-912. [PMID: 29380724 PMCID: PMC5930868 DOI: 10.4269/ajtmh.17-0457] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [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] [Indexed: 12/29/2022] Open
Abstract
Children in low-income countries experience multiple illness symptoms in early childhood. Breastfeeding is protective against diarrhea and respiratory infections, and these illnesses are thought to be risk factors of one another, but these relationships have not been explored simultaneously. In the eight-site MAL-ED study, 1,731 infants were enrolled near birth and followed for 2 years. We collected symptoms and diet information through twice-weekly household visits. Poisson regression was used to determine if recent illness history was associated with incidence of diarrhea or acute lower respiratory infections (ALRI), accounting for exclusive breastfeeding. Recent diarrhea was associated with higher risk of incident diarrhea after the first 6 months of life (relative risk [RR] 1.10, 95% confidence interval [CI] 1.04, 1.16) and with higher risk of incident ALRI in the 3- to 5-month period (RR 1.23, 95% CI 1.03, 1.47). Fever was a consistent risk factor for both diarrhea and ALRI. Exclusive breastfeeding 0-6 months was protective against diarrhea (0-2 months: RR 0.39, 95% CI 0.32, 0.49; 3-5 months: RR 0.83, 95% CI 0.75, 0.93) and ALRI (3-5 months: RR 0.81, 95% CI 0.68, 0.98). Children with recent illness who were exclusively breastfed were half as likely as those not exclusively breastfed to experience diarrhea in the first 3 months of life. Recent illness was associated with greater risk of new illness, causing illnesses to cluster within children, indicating that specific illness-prevention programs may have benefits for preventing other childhood illnesses. The results also underscore the importance of exclusive breastfeeding in the first 6 months of life for disease prevention.
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Affiliation(s)
- Stephanie A Richard
- Fogarty International Center/National Institutes of Health, Bethesda, Maryland
| | | | - Jessica C Seidman
- Fogarty International Center/National Institutes of Health, Bethesda, Maryland
| | - Zeba Rasmussen
- Fogarty International Center/National Institutes of Health, Bethesda, Maryland
| | | | | | | | | | | | | | | | | | - Ali Turab
- Aga Khan University, Karachi, Pakistan
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71
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Olortegui MP, Rouhani S, Yori PP, Salas MS, Trigoso DR, Mondal D, Bodhidatta L, Platts-Mills J, Samie A, Kabir F, Lima A, Babji S, Shrestha SK, Mason CJ, Kalam A, Bessong P, Ahmed T, Mduma E, Bhutta ZA, Lima I, Ramdass R, Moulton LH, Lang D, George A, Zaidi AK, Kang G, Houpt ER, Kosek MN. Astrovirus Infection and Diarrhea in 8 Countries. Pediatrics 2018; 141:peds.2017-1326. [PMID: 29259078 PMCID: PMC9923568 DOI: 10.1542/peds.2017-1326] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/12/2017] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND AND OBJECTIVES Astroviruses are important drivers of viral gastroenteritis but remain understudied in community settings and low- and middle-income countries. We present data from 8 countries with high prevalence of diarrhea and undernutrition to describe astrovirus epidemiology and assess evidence for protective immunity among children 0 to 2 years of age. METHODS We used 25 898 surveillance stools and 7077 diarrheal stools contributed by 2082 children for enteropathogen testing, and longitudinal statistical analysis to describe incidence, risk factors, and protective immunity. RESULTS Thirty-five percent of children experienced astrovirus infections. Prevalence in diarrheal stools was 5.6%, and severity exceeded all enteropathogens except rotavirus. Incidence of infection and diarrhea were 2.12 and 0.88 episodes per 100 child-months, respectively. Children with astrovirus infection had 2.30 times the odds of experiencing diarrhea after adjustment for covariates (95% confidence interval [CI], 2.01-2.62; P < .001). Undernutrition was a risk factor: odds of infection and diarrhea were reduced by 10% and 13%, respectively, per increase in length-for-age z score (infection: odds ratio, 0.90 [95% CI, 0.85-0.96]; P < .001; diarrhea: odds ratio, 0.87 [95% CI, 0.79-0.96]; P = .006). Some evidence of protective immunity to infection was detected (hazard ratio, 0.84 [95% CI, 0.71-1.00], P = .052), although this was heterogeneous between sites and significant in India and Peru. CONCLUSIONS Astrovirus is an overlooked cause of diarrhea among vulnerable children worldwide. With the evidence presented here, we highlight the need for future research as well as the potential for astrovirus to be a target for vaccine development.
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Affiliation(s)
| | - Saba Rouhani
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Pablo Peñataro Yori
- Asociación Benéfica PRISMA, Iquitos, Peru;,Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | | | | | | | | | - James Platts-Mills
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, Virginia
| | | | | | - Aldo Lima
- Universidade Federal do Ceará, Fortaleza, Brazil
| | | | - Sanjaya Kumar Shrestha
- Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand;,Centre for International Health, University of Bergen, Bergen, Norway
| | - Carl J. Mason
- Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | - Adil Kalam
- Aga Khan University, Naushahro Feroze, Pakistan
| | | | | | | | | | - Ila Lima
- Universidade Federal do Ceará, Fortaleza, Brazil
| | | | - Lawrence H. Moulton
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Dennis Lang
- Fogarty International Center, National Institutes of Health, Bethesda, Maryland; and,Foundation for the National Institutes of Health, Bethesda, Maryland
| | | | | | | | - Eric R. Houpt
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, Virginia
| | - Margaret N. Kosek
- Asociación Benéfica PRISMA, Iquitos, Peru;,Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland;,Address correspondence to Margaret N. Kosek, MD, Department of International Health, Johns Hopkins Bloomberg School of Public Health, 615 N Wolfe St, Baltimore, MD 21205. E-mail
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72
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Mohan VR, Karthikeyan R, Babji S, McGrath M, Shrestha S, Shrestha J, Mdumah E, Amour C, Samie A, Nyathi E, Haque R, Qureshi S, Yori PP, Lima AAM, Bodhidatta L, Svensen E, Bessong P, Ahmed T, Seidman JC, Zaidi AKM, Kosek MN, Guerrant RL, Gratz J, Platts-Mills JA, Lang DR, Gottlieb M, Houpt ER, Kang G. Rotavirus Infection and Disease in a Multisite Birth Cohort: Results From the MAL-ED Study. J Infect Dis 2017; 216:305-316. [PMID: 28472348 DOI: 10.1093/infdis/jix199] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [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: 01/07/2017] [Accepted: 04/27/2017] [Indexed: 12/14/2022] Open
Abstract
Background In a multicountry birth cohort study, we describe rotavirus infection in the first 2 years of life in sites with and without rotavirus vaccination programs. Methods Children were recruited by 17 days of age and followed to 24 months with collection of monthly surveillance and diarrheal stools. Data on sociodemographics, feeding, and illness were collected at defined intervals. Stools were tested for rotavirus and sera for antirotavirus immunoglobulins by enzyme immunoassays. Results A total of 1737 children contributed 22646 surveillance and 7440 diarrheal specimens. Overall, rotavirus was detected in 5.5% (408/7440) of diarrheal stools, and 344 (19.8%) children ever had rotavirus gastroenteritis. Household overcrowding and a high pathogen load were consistent risk factors for infection and disease. Three prior infections conferred 74% (P < .001) protection against subsequent infection in sites not using vaccine. In Peru, incidence of rotavirus disease was relatively higher during the second year of life despite high vaccination coverage. Conclusions Rotavirus infection and disease were common, but with significant heterogeneity by site. Protection by vaccination may not be sustained in the second year of life in settings with high burdens of transmission and poor response to oral vaccines.
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Affiliation(s)
| | | | - Sudhir Babji
- Division of Gastrointestinal Sciences, Christian Medical College, Vellore, India
| | - Monica McGrath
- Fogarty International Center, National Institutes of Health, Bethesda, Maryland
| | - Sanjaya Shrestha
- Walter Reed/Armed Forces Research Institute of Medical Sciences (AFRIMS) Research Unit Nepal.,Centre for International Health, University of Bergen, Norway
| | - Jasmin Shrestha
- Walter Reed/Armed Forces Research Institute of Medical Sciences (AFRIMS) Research Unit Nepal.,Centre for International Health, University of Bergen, Norway
| | | | | | | | | | - Rashidul Haque
- International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh
| | | | - Pablo Peñataro Yori
- Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland.,Asociación Benéfica PRISMA, Iquitos, Peru
| | - Aldo A M Lima
- Clinical Research Unit and Institute of Biomedicine, Federal University of Ceara, Fortaleza, Brazil
| | - Ladaporn Bodhidatta
- Walter Reed/Armed Forces Research Institute of Medical Sciences (AFRIMS) Research Unit Nepal.,Centre for International Health, University of Bergen, Norway
| | | | | | - Tahmeed Ahmed
- International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh
| | - Jessica C Seidman
- Fogarty International Center, National Institutes of Health, Bethesda, Maryland
| | | | - Margaret N Kosek
- Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland.,Asociación Benéfica PRISMA, Iquitos, Peru
| | - Richard L Guerrant
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville
| | - Jean Gratz
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville
| | - James A Platts-Mills
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville
| | - Dennis R Lang
- Foundation for the National Institutes of Health, Bethesda, Maryland
| | - Michael Gottlieb
- Foundation for the National Institutes of Health, Bethesda, Maryland
| | - Eric R Houpt
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville
| | - Gagandeep Kang
- Division of Gastrointestinal Sciences, Christian Medical College, Vellore, India
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73
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Rogawski ET, Guerrant RL, Havt A, Lima IFN, Medeiros PHQS, Seidman JC, McCormick BJJ, Babji S, Hariraju D, Bodhidatta L, Shrestha J, Anania J, Maro A, Samie A, Yori PP, Qureshi S, Mahfuz M, Bessong PO, Kosek MN, Ahmed T, Bhutta ZA, Lang DR, Gottlieb M, Houpt ER, Lima AAM. Epidemiology of enteroaggregative Escherichia coli infections and associated outcomes in the MAL-ED birth cohort. PLoS Negl Trop Dis 2017; 11:e0005798. [PMID: 28742106 PMCID: PMC5542697 DOI: 10.1371/journal.pntd.0005798] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [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: 04/20/2017] [Revised: 08/03/2017] [Accepted: 07/11/2017] [Indexed: 11/23/2022] Open
Abstract
Background Enteroaggregative E. coli (EAEC) have been associated with mildly inflammatory diarrhea in outbreaks and in travelers and have been increasingly recognized as enteric pathogens in young children with and without overt diarrhea. We examined the risk factors for EAEC infections and their associations with environmental enteropathy biomarkers and growth outcomes over the first two years of life in eight low-resource settings of the MAL-ED study. Methods EAEC infections were detected by PCR gene probes for aatA and aaiC virulence traits in 27,094 non-diarrheal surveillance stools and 7,692 diarrheal stools from 2,092 children in the MAL-ED birth cohort. We identified risk factors for EAEC and estimated the associations of EAEC with diarrhea, enteropathy biomarker concentrations, and both short-term (one to three months) and long-term (to two years of age) growth. Results Overall, 9,581 samples (27.5%) were positive for EAEC, and almost all children had at least one detection (94.8%) by two years of age. Exclusive breastfeeding, higher enrollment weight, and macrolide use within the preceding 15 days were protective. Although not associated with diarrhea, EAEC infections were weakly associated with biomarkers of intestinal inflammation and more strongly with reduced length at two years of age (LAZ difference associated with high frequency of EAEC detections: -0.30, 95% CI: -0.44, -0.16). Conclusions Asymptomatic EAEC infections were common early in life and were associated with linear growth shortfalls. Associations with intestinal inflammation were small in magnitude, but suggest a pathway for the growth impact. Increasing the duration of exclusive breastfeeding may help prevent these potentially inflammatory infections and reduce the long-term impact of early exposure to EAEC. Enteroaggregative E. coli (EAEC) are pathogens that infect the intestine and can cause diarrhea. They are also commonly identified among young children in low-resource settings, who can carry the pathogen without symptomatic diarrhea. We examined the risk factors for EAEC infections and their associations with child health outcomes over the first two years of life in eight low-resource settings of the MAL-ED study. EAEC infections were detected using molecular methods in more than 30,000 stools collected from 2,092 children in the MAL-ED study. We identified risk factors for EAEC and estimated the associations of EAEC with diarrhea, markers of intestinal health, and child growth. Almost all children were infected with EAEC at least once by two years of age. Exclusive breastfeeding, higher enrollment weight, and recent macrolide antibiotic use were protective against these infections. Although not associated with diarrhea in these children, EAEC infections were associated with intestinal inflammation and reduced length at two years of age. EAEC may impact child development, even in the absence of diarrhea, by causing intestinal inflammation and impairing child growth.
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Affiliation(s)
- Elizabeth T. Rogawski
- Department of Public Health Sciences, University of Virginia, Charlottesville, Virginia, United States of America
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, Virginia, United States of America
- * E-mail:
| | - Richard L. Guerrant
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, Virginia, United States of America
| | - Alexandre Havt
- Clinical Research Unit and Institute of Biomedicine, Federal University of Ceara, Fortaleza, Brazil
| | - Ila F. N. Lima
- Clinical Research Unit and Institute of Biomedicine, Federal University of Ceara, Fortaleza, Brazil
| | - Pedro H. Q. S. Medeiros
- Clinical Research Unit and Institute of Biomedicine, Federal University of Ceara, Fortaleza, Brazil
| | - Jessica C. Seidman
- Fogarty International Center, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Benjamin J. J. McCormick
- Fogarty International Center, National Institutes of Health, Bethesda, Maryland, United States of America
| | - Sudhir Babji
- Division of Gastrointestinal Sciences, Christian Medical College, Vellore, India
| | - Dinesh Hariraju
- Division of Gastrointestinal Sciences, Christian Medical College, Vellore, India
| | - Ladaporn Bodhidatta
- Department of Enteric Diseases, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | | | - Japhat Anania
- Haydom Global Health Research Center, Haydom Lutheran Hospital, Haydom, Tanzania
| | - Athanasia Maro
- Haydom Global Health Research Center, Haydom Lutheran Hospital, Haydom, Tanzania
| | - Amidou Samie
- Department of Microbiology, University of Venda, Thohoyandou, South Africa
| | | | - Shahida Qureshi
- Department of Paediatrics and Child Health, Aga Khan University, Karachi, Pakistan
| | - Mustafa Mahfuz
- Nutrition and Clinical Services Division, International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh
| | - Pascal O. Bessong
- Department of Microbiology, University of Venda, Thohoyandou, South Africa
| | - Margaret N. Kosek
- Asociación Benéfica PRISMA, Iquitos, Peru
- Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland, United States of America
| | - Tahmeed Ahmed
- Nutrition and Clinical Services Division, International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh
| | - Zulfiqar A. Bhutta
- Department of Paediatrics and Child Health, Aga Khan University, Karachi, Pakistan
| | - Dennis R. Lang
- Foundation for the National Institutes of Health, Bethesda, Maryland, United States of America
| | - Michael Gottlieb
- Foundation for the National Institutes of Health, Bethesda, Maryland, United States of America
| | - Eric R. Houpt
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, Virginia, United States of America
| | - Aldo A. M. Lima
- Clinical Research Unit and Institute of Biomedicine, Federal University of Ceara, Fortaleza, Brazil
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Lee GO, McCormick BJJ, Seidman JC, Kosek MN, Haque R, Olortegui MP, Lima AAM, Bhutta ZA, Kang G, Samie A, Amour C, Mason CJ, Ahmed T, Yori PP, Oliveira DB, Alam D, Babji S, Bessong P, Mduma E, Shrestha SK, Ambikapathi R, Lang DR, Gottlieb M, Guerrant RL, Caulfield LE. Infant Nutritional Status, Feeding Practices, Enteropathogen Exposure, Socioeconomic Status, and Illness Are Associated with Gut Barrier Function As Assessed by the Lactulose Mannitol Test in the MAL-ED Birth Cohort. Am J Trop Med Hyg 2017; 97:281-290. [PMID: 28719336 PMCID: PMC5508897 DOI: 10.4269/ajtmh.16-0830] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2016] [Accepted: 01/31/2017] [Indexed: 12/20/2022] Open
Abstract
The lactulose mannitol (LM) dual sugar permeability test is the most commonly used test of environmental enteropathy in developing countries. However, there is a large but conflicting literature on its association with enteric infection and host nutritional status. We conducted a longitudinal cohort using a single field protocol and comparable laboratory procedures to examine intestinal permeability in multiple, geographically diverse pediatric populations. Using a previously published systematic review to guide the selection of factors potentially associated with LM test results, we examined the relationships between these factors and mucosal breach, represented by percent lactulose excretion; absorptive area, represented by percent mannitol excretion; and gut barrier function, represented by the L/M ratio. A total of 6,602 LM tests were conducted in 1,980 children at 3, 6, 9, and 15 months old; percent lactulose excretion, percent mannitol excretion, and the L/M ratio were expressed as age- and sex-specific normalized values using the Brazil cohort as the reference population. Among the factors considered, recent severe diarrhea, lower socioeconomic status, and recent asymptomatic enteropathogen infections were associated with decreased percent mannitol excretion and higher L/M ratios. Poorer concurrent weight-for-age, infection, and recent breastfeeding were associated with increased percent lactulose excretion and increased L/M ratios. Our results support previously reported associations between the L/M ratio and factors related to child nutritional status and enteropathogen exposure. These results were remarkably consistent across sites and support the hypothesis that the frequency of these exposures in communities living in poverty leads to alterations in gut barrier function.
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Affiliation(s)
- Gwenyth O. Lee
- Fogarty International Center, National Institutes of Health, Bethesda, Maryland
- Department of Epidemiology, University of Michigan School of Public Health, Ann Arbor, Michigan
| | | | - Jessica C. Seidman
- Fogarty International Center, National Institutes of Health, Bethesda, Maryland
| | - Margaret N. Kosek
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | | | | | - Aldo A. M. Lima
- Institute of Biomedicine, Federal University of Ceara, Fortaleza, Brazil
| | - Zulfiqar A. Bhutta
- Center of Excellence in Women and Child Health, the Aga Khan University, Karachi, Pakistan
| | - Gagandeep Kang
- Division of Gastrointestinal Sciences, Christian Medical College, Vellore, India
| | - Amidou Samie
- Department of Microbiology, University of Venda, Thohoyandou, South Africa
| | | | - Carl J. Mason
- Walter Reed/Armed Forces Research Institute of Medical Sciences, Kathmandu, Nepal
| | | | - Pablo Peñataro Yori
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | | | - Didar Alam
- Center of Excellence in Women and Child Health, the Aga Khan University, Karachi, Pakistan
| | - Sudhir Babji
- Division of Gastrointestinal Sciences, Christian Medical College, Vellore, India
| | - Pascal Bessong
- Department of Microbiology, University of Venda, Thohoyandou, South Africa
| | | | - Sanjaya K. Shrestha
- Walter Reed/Armed Forces Research Institute of Medical Sciences, Kathmandu, Nepal
| | - Ramya Ambikapathi
- Fogarty International Center, National Institutes of Health, Bethesda, Maryland
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Dennis R. Lang
- Fogarty International Center, National Institutes of Health, Bethesda, Maryland
- Foundation for the NIH, Bethesda, Maryland
| | | | - Richard L. Guerrant
- Division of Infectious Diseases, University of Virginia, Charlottesville, Virginia
| | - Laura E. Caulfield
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
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Colston JM, Peñataro Yori P, Colantuoni E, Moulton LH, Ambikapathi R, Lee G, Rengifo Trigoso D, Siguas Salas M, Kosek MN. A methodologic framework for modeling and assessing biomarkers of environmental enteropathy as predictors of growth in infants: an example from a Peruvian birth cohort. Am J Clin Nutr 2017; 106:245-255. [PMID: 28592604 DOI: 10.3945/ajcn.116.151886] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [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: 02/03/2017] [Accepted: 05/09/2017] [Indexed: 11/14/2022] Open
Abstract
Background: Environmental enteropathy (EE) impairs the gut's absorptive capacity and immune function and causes decelerations in statural growth that manifest gradually over time.Objective: To illustrate an approach for assessing emerging biomarkers of EE, we separately assessed the associations between 3 such markers and subsequent nutritional status.Design: Stool samples were routinely collected between January 2010 and November 2014 from a cohort of 303 Peruvian infants and analyzed for concentrations of the biomarkers α-1-antitrypsin (AAT), myeloperoxidase, and neopterin. For each marker, a mixed-effects linear regression model was fitted for length-for-age z scores (LAZs) obtained from anthropometric assessments that incorporated covariate predictors, polynomial terms for age, and product interaction terms to test associations over varying lag lengths. The biomarkers' contribution to the models was assessed with the use of the likelihood ratio test and partial R2 statistics.Results: Test statistics for the combined inclusion of the 4-model terms that involved the biomarker were highly statistically significant for AAT (28.71; P < 0.0001) and myeloperoxidase (62.79; P < 0.0001) over a 3-mo lag and moderately so for neopterin (13.97; P = 0.0074). AAT and myeloperoxidase seemed to interact strongly with age, with the magnitude and direction of the effect varying considerably over the first 3 y of life. The largest proportion of the variance explained by any biomarker (2.8%) and the largest difference in LAZ predicted between the 5th and 95th percentile (0.25) was by myeloperoxidase over a 2-mo lag.Conclusions: Of the 3 fecal biomarkers studied, 2 that related to intestinal function-AAT and myeloperoxidase-were associated with small but highly statistically significant differences in future statural growth trajectories in infants in this cohort, lending further evidence to the EE hypothesis that increased gut permeability and inflammation adversely affects subsequent nutritional status. This association exhibited a complex interaction with age. This trial was registered at clinicaltrials.gov as NCT02441426.
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Affiliation(s)
| | | | | | - Lawrence H Moulton
- Departments of International Health and.,Biostatistics, Johns Hopkins School of Public Health, Baltimore, MD
| | | | - Gwenyth Lee
- Department of Epidemiology, University of Michigan, Ann Arbor, MI; and
| | - Dixner Rengifo Trigoso
- Biomedical Research Unit, Asociación Benéfica PRISMA (PRISMA Charitable Association), Iquitos, Peru
| | - Mery Siguas Salas
- Biomedical Research Unit, Asociación Benéfica PRISMA (PRISMA Charitable Association), Iquitos, Peru
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Rogawski ET, Bartelt LA, Platts-Mills JA, Seidman JC, Samie A, Havt A, Babji S, Trigoso DR, Qureshi S, Shakoor S, Haque R, Mduma E, Bajracharya S, Gaffar SMA, Lima AAM, Kang G, Kosek MN, Ahmed T, Svensen E, Mason C, Bhutta ZA, Lang DR, Gottlieb M, Guerrant RL, Houpt ER, Bessong PO. Determinants and Impact of Giardia Infection in the First 2 Years of Life in the MAL-ED Birth Cohort. J Pediatric Infect Dis Soc 2017; 6:153-160. [PMID: 28204556 PMCID: PMC5907871 DOI: 10.1093/jpids/piw082] [Citation(s) in RCA: 99] [Impact Index Per Article: 14.1] [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: 08/12/2016] [Accepted: 11/28/2016] [Indexed: 11/13/2022]
Abstract
BACKGROUND. Giardia are among the most common enteropathogens detected in children in low-resource settings. We describe here the epidemiology of infection with Giardia in the first 2 years of life in the Etiology, Risk Factors, and Interactions of Enteric Infections and Malnutrition and the Consequences for Child Health and Development Project (MAL-ED), a multisite birth-cohort study. METHODS. From 2089 children, 34916 stool samples collected during monthly surveillance and episodes of diarrhea were tested for Giardia using an enzyme immunoassay. We quantified the risk of Giardia detection, identified risk factors, and assessed the associations with micronutrients, markers of gut inflammation and permeability, diarrhea, and growth using multivariable linear regression. RESULTS. The incidence of at least 1 Giardia detection varied according to site (range, 37.7%-96.4%) and was higher in the second year of life. Exclusive breastfeeding (HR for first Giardia detection in a monthly surveillance stool sample, 0.46 [95% confidence interval (CI), 0.28-0.75]), higher socioeconomic status (HR, 0.74 [95% CI, 0.56-0.97]), and recent metronidazole treatment (risk ratio for any surveillance stool detection, 0.69 [95% CI, 0.56-0.84]) were protective. Persistence of Giardia (consecutive detections) in the first 6 months of life was associated with reduced subsequent diarrheal rates in Naushahro Feroze, Pakistan but not at any other site. Giardia detection was also associated with an increased lactulose/mannitol ratio. Persistence of Giardia before 6 months of age was associated with a -0.29 (95% CI, -0.53 to -0.05) deficit in weight-for-age z score and -0.29 (95% CI, -0.64 to 0.07) deficit in length-for-age z score at 2 years. CONCLUSIONS. Infection with Giardia occurred across epidemiological contexts, and repeated detections in 40% of the children suggest that persistent infections were common. Early persistent infection with Giardia, independent of diarrhea, might contribute to intestinal permeability and stunted growth.
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Affiliation(s)
- Elizabeth T. Rogawski
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville
| | - Luther A. Bartelt
- Division of Infectious Diseases, University of North Carolina-Chapel Hill
| | - James A. Platts-Mills
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville
| | - Jessica C. Seidman
- Fogarty International Center, National Institutes of Health, Bethesda, Maryland
| | | | - Alexandre Havt
- Clinical Research Unit and Institute of Biomedicine, Federal University of Ceara, Fortaleza, Brazil
| | | | | | | | | | - Rashidul Haque
- International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh
| | | | | | | | - Aldo A. M. Lima
- Clinical Research Unit and Institute of Biomedicine, Federal University of Ceara, Fortaleza, Brazil
| | | | - Margaret N. Kosek
- Asociación Benéfica PRISMA, Iquitos, Peru;,Bloomberg School of Public Health, Johns Hopkins University, Baltimore, Maryland
| | - Tahmeed Ahmed
- International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh
| | | | - Carl Mason
- Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand; and
| | | | - Dennis R. Lang
- Foundation for the National Institutes of Health, Bethesda, Maryland
| | - Michael Gottlieb
- Foundation for the National Institutes of Health, Bethesda, Maryland
| | - Richard L. Guerrant
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville
| | - Eric R. Houpt
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville
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Kosek MN. Causal Pathways from Enteropathogens to Environmental Enteropathy: Findings from the MAL-ED Birth Cohort Study. EBioMedicine 2017; 18:109-117. [PMID: 28396264 PMCID: PMC5405169 DOI: 10.1016/j.ebiom.2017.02.024] [Citation(s) in RCA: 155] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2016] [Revised: 02/09/2017] [Accepted: 02/23/2017] [Indexed: 01/23/2023] Open
Abstract
Children living in these settings had a high prevalence of enteropathogens, high levels of intestinal inflammation, abnormal intestinal permeability, high markers of systemic inflammation, and postnatal acquired linear growth deficits when compared to children living in the US or Europe This study contributes empiric evidence to demonstrate that enteric infection alters both fecal markers of inflammation and permeability Current markers of enteropathy fail to account for a large portion of the observed shortfalls in linear growth in these populations, and markers of systemic inflammation appear as the most promising predictive biomarkers for identifying linear growth failure in children
Environmental enteropathy (EE) is hypothesized as a mediator of growth faltering, but few prospective studies have evaluated pathways linking enteropathogen exposure, intestinal inflammation and permeability, and growth. The MAL-ED study represents a novel analytical framework and explicitly evaluates multiple putative EE pathways in combination and using an unprecedented quantity of data. Despite evidence that gut inflammation and altered gut permeability are frequently present and that associations between enteropathogen exposure and gut dysfunction exist, the observed attributable effects of EE on growth faltering in young children were small. Background Environmental enteropathy (EE), the adverse impact of frequent and numerous enteric infections on the gut resulting in a state of persistent immune activation and altered permeability, has been proposed as a key determinant of growth failure in children in low- and middle-income populations. A theory-driven systems model to critically evaluate pathways through which enteropathogens, gut permeability, and intestinal and systemic inflammation affect child growth was conducted within the framework of the Etiology, Risk Factors and Interactions of Enteric Infections and Malnutrition and the Consequences for Child Health and Development (MAL-ED) birth cohort study that included children from eight countries. Methods Non-diarrheal stool samples (N = 22,846) from 1253 children from multiple sites were evaluated for a panel of 40 enteropathogens and fecal concentrations of myeloperoxidase, alpha-1-antitrypsin, and neopterin. Among these same children, urinary lactulose:mannitol (L:M) (N = 6363) and plasma alpha-1-acid glycoprotein (AGP) (N = 2797) were also measured. The temporal sampling design was used to create a directed acyclic graph of proposed mechanistic pathways between enteropathogen detection in non-diarrheal stools, biomarkers of intestinal permeability and inflammation, systemic inflammation and change in length- and weight- for age in children 0–2 years of age. Findings Children in these populations had frequent enteric infections and high levels of both intestinal and systemic inflammation. Higher burdens of enteropathogens, especially those categorized as being enteroinvasive or causing mucosal disruption, were associated with elevated biomarker concentrations of gut and systemic inflammation and, via these associations, indirectly associated with both reduced linear and ponderal growth. Evidence for the association with reduced linear growth was stronger for systemic inflammation than for gut inflammation; the opposite was true of reduced ponderal growth. Although Giardia was associated with reduced growth, the association was not mediated by any of the biomarkers evaluated. Interpretation The large quantity of empirical evidence contributing to this analysis supports the conceptual model of EE. The effects of EE on growth faltering in young children were small, but multiple mechanistic pathways underlying the attribution of growth failure to asymptomatic enteric infections had statistical support in the analysis. The strongest evidence for EE was the association between enteropathogens and linear growth mediated through systemic inflammation. Funding Bill & Melinda Gates Foundation.
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78
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McCormick BJJ, Lee GO, Seidman JC, Haque R, Mondal D, Quetz J, Lima AAM, Babji S, Kang G, Shrestha SK, Mason CJ, Qureshi S, Bhutta ZA, Olortegui MP, Yori PP, Samie A, Bessong P, Amour C, Mduma E, Patil CL, Guerrant RL, Lang DR, Gottlieb M, Caulfield LE, Kosek MN. Dynamics and Trends in Fecal Biomarkers of Gut Function in Children from 1-24 Months in the MAL-ED Study. Am J Trop Med Hyg 2016; 96:465-472. [PMID: 27994110 PMCID: PMC5303054 DOI: 10.4269/ajtmh.16-0496] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [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: 06/17/2016] [Accepted: 09/06/2016] [Indexed: 12/28/2022] Open
Abstract
Growth and development shortfalls that are disproportionately prevalent in children living in poor environmental conditions are postulated to result, at least in part, from abnormal gut function. Using data from The Etiology, Risk Factors, and Interactions of Enteric Infections and Malnutrition and the Consequences for Child Health and Development (MAL-ED) longitudinal cohort study, we examine biomarkers of gut inflammation and permeability in relation to environmental exposures and feeding practices. Trends in the concentrations of three biomarkers, myeloperoxidase (MPO), neopterin (NEO), and α-1-antitrypsin (AAT), are described from fecal samples collected during the first 2 years of each child's life. A total of 22,846 stool samples were processed during the longitudinal sampling of 2,076 children 0–24 months of age. Linear mixed models were constructed to examine the relationship between biomarker concentrations and recent food intake, symptoms of illness, concurrent enteropathogen infection, and socioeconomic status. Average concentrations of MPO, NEO, and AAT were considerably higher than published references for healthy adults. The concentration of each biomarker tended to decrease over the first 2 years of life and was highly variable between samples from each individual child. Both MPO and AAT were significantly elevated by recent breast milk intake. All three biomarkers were associated with pathogen presence, although the strength and direction varied by pathogen. The interpretation of biomarker concentrations is subject to the context of their collection. Herein, we identify that common factors (age, breast milk, and enteric infection) influence the concentration of these biomarkers. Within the context of low- and middle-income communities, we observe concentrations that indicate gut abnormalities, but more appropriate reference standards are needed.
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Affiliation(s)
| | - Gwenyth O Lee
- Tulane University, New Orleans, Louisiana.,Fogarty International Center/National Institutes of Health, Bethesda, Maryland
| | - Jessica C Seidman
- Fogarty International Center/National Institutes of Health, Bethesda, Maryland
| | - Rashidul Haque
- International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh
| | - Dinesh Mondal
- International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh
| | | | | | | | | | - Sanjaya K Shrestha
- Walter Reed/Armed Forces Research Institute of Medical Science (AFRIMS) Research Unit, Kathmandu, Nepal
| | - Carl J Mason
- Walter Reed/Armed Forces Research Institute of Medical Science (AFRIMS) Research Unit, Kathmandu, Nepal
| | | | | | - Maribel Paredes Olortegui
- Asociacion Benéfica Proyectos en Informatica, Salud, Medicina, y Agricultura (A. B. PRISMA), Iquitos, Peru
| | - Pablo Peñataro Yori
- Asociacion Benéfica Proyectos en Informatica, Salud, Medicina, y Agricultura (A. B. PRISMA), Iquitos, Peru
| | | | | | | | | | | | | | - Dennis R Lang
- Foundation for the National Institutes of Health, Bethesda, Maryland.,Fogarty International Center/National Institutes of Health, Bethesda, Maryland
| | - Michael Gottlieb
- Foundation for the National Institutes of Health, Bethesda, Maryland
| | - Laura E Caulfield
- Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Margaret N Kosek
- Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
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79
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Rogawski ET, Platts-Mills JA, Seidman JC, John S, Mahfuz M, Ulak M, Shrestha SK, Soofi SB, Yori PP, Mduma E, Svensen E, Ahmed T, Lima AA, Bhutta ZA, Kosek MN, Lang DR, Gottlieb M, Zaidi AK, Kang G, Bessong PO, Houpt ER, Guerrant RL. Use of antibiotics in children younger than two years in eight countries: a prospective cohort study. Bull World Health Organ 2016; 95:49-61. [PMID: 28053364 PMCID: PMC5180352 DOI: 10.2471/blt.16.176123] [Citation(s) in RCA: 122] [Impact Index Per Article: 15.3] [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: 04/21/2016] [Revised: 08/31/2016] [Accepted: 10/03/2016] [Indexed: 12/29/2022] Open
Abstract
OBJECTIVE To describe the frequency and factors associated with antibiotic use in early childhood, and estimate the proportion of diarrhoea and respiratory illnesses episodes treated with antibiotics. METHODS Between 2009 and 2014, we followed 2134 children from eight sites in Bangladesh, Brazil, India, Nepal, Pakistan, Peru, South Africa and the United Republic of Tanzania, enrolled in the MAL-ED birth cohort study. We documented all antibiotic use from mothers' reports at twice-weekly visits over the children's first two years of life. We estimated the incidence of antibiotic use and the associations of antibiotic use with child and household characteristics. We described treatment patterns for diarrhoea and respiratory illnesses, and identified factors associated with treatment and antibiotic class. FINDINGS Over 1 346 388 total days of observation, 16 913 courses of antibiotics were recorded (an incidence of 4.9 courses per child per year), with the highest use in South Asia. Antibiotic treatment was given for 375/499 (75.2%) episodes of bloody diarrhoea and for 4274/9661 (44.2%) episodes of diarrhoea without bloody stools. Antibiotics were used in 2384/3943 (60.5%) episodes of fieldworker-confirmed acute lower respiratory tract illness as well as in 6608/16742 (39.5%) episodes of upper respiratory illness. Penicillins were used most frequently for respiratory illness, while antibiotic classes for diarrhoea treatment varied within and between sites. CONCLUSION Repeated antibiotic exposure was common early in life, and treatment of non-bloody diarrhoea and non-specific respiratory illnesses was not consistent with international recommendations. Rational antibiotic use programmes may have the most impact in South Asia, where antibiotic use was highest.
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Affiliation(s)
- Elizabeth T Rogawski
- Division of Infectious Diseases and International Health, University of Virginia, PO Box 801379, Carter Harrison Research Bldg MR-6, 345 Crispell Drive, Room 2520, Charlottesville, Virginia 22908-1379, United States of America (USA)
| | - James A Platts-Mills
- Division of Infectious Diseases and International Health, University of Virginia, PO Box 801379, Carter Harrison Research Bldg MR-6, 345 Crispell Drive, Room 2520, Charlottesville, Virginia 22908-1379, United States of America (USA)
| | - Jessica C Seidman
- Fogarty International Center, National Institutes of Health, Bethesda, USA
| | | | - Mustafa Mahfuz
- International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh
| | - Manjeswori Ulak
- Institute of Medicine, Tribhuvan University, Kathmandu, Nepal
| | | | | | | | - Estomih Mduma
- Haydom Lutheran Hospital, Haydom, United Republic of Tanzania
| | | | - Tahmeed Ahmed
- International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh
| | - Aldo Am Lima
- Clinical Research Unit and Institute of Biomedicine, Federal University of Ceara, Fortaleza, Brazil
| | | | - Margaret N Kosek
- Bloomberg School of Public Health, Johns Hopkins University, Baltimore, USA
| | - Dennis R Lang
- Foundation for the National Institutes of Health, Bethesda, USA
| | | | | | | | | | - Eric R Houpt
- Division of Infectious Diseases and International Health, University of Virginia, PO Box 801379, Carter Harrison Research Bldg MR-6, 345 Crispell Drive, Room 2520, Charlottesville, Virginia 22908-1379, United States of America (USA)
| | - Richard L Guerrant
- Division of Infectious Diseases and International Health, University of Virginia, PO Box 801379, Carter Harrison Research Bldg MR-6, 345 Crispell Drive, Room 2520, Charlottesville, Virginia 22908-1379, United States of America (USA)
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80
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Kosek MN, Mduma E, Kosek PS, Lee GO, Svensen E, Pan WKY, Olortegui MP, Bream JH, Patil C, Asayag CR, Sanchez GM, Caulfield LE, Gratz J, Yori PP. Plasma Tryptophan and the Kynurenine-Tryptophan Ratio are Associated with the Acquisition of Statural Growth Deficits and Oral Vaccine Underperformance in Populations with Environmental Enteropathy. Am J Trop Med Hyg 2016; 95:928-937. [PMID: 27503512 PMCID: PMC5062803 DOI: 10.4269/ajtmh.16-0037] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [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: 01/13/2016] [Accepted: 06/14/2016] [Indexed: 01/22/2023] Open
Abstract
Early childhood enteric infections have adverse impacts on child growth and can inhibit normal mucosal responses to oral vaccines, two critical components of environmental enteropathy. To evaluate the role of indoleamine 2,3-dioxygenase 1 (IDO1) activity and its relationship with these outcomes, we measured tryptophan and the kynurenine–tryptophan ratio (KTR) in two longitudinal birth cohorts with a high prevalence of stunting. Children in rural Peru and Tanzania (N = 494) contributed 1,251 plasma samples at 3, 7, 15, and 24 months of age and monthly anthropometrics from 0 to 36 months of age. Tryptophan concentrations were directly associated with linear growth from 1 to 8 months after biomarker assessment. A 1-SD increase in tryptophan concentration was associated with a gain in length-for-age Z-score (LAZ) of 0.17 over the next 6 months in Peru (95% confidence interval [CI] = 0.11–0.23, P < 0.001) and a gain in LAZ of 0.13 Z-scores in Tanzania (95% CI = 0.03–0.22, P = 0.009). Vaccine responsiveness data were available for Peru only. An increase in kynurenine by 1 μM was associated with a 1.63 (95% CI = 1.13–2.34) increase in the odds of failure to poliovirus type 1, but there was no association with tetanus vaccine response. A KTR of 52 was 76% sensitive and 50% specific in predicting failure of response to serotype 1 of the oral polio vaccine. KTR was associated with systemic markers of inflammation, but also interleukin-10, supporting the association between IDO1 activity and immunotolerance. These results strongly suggest that the activity of IDO1 is implicated in the pathophysiology of environmental enteropathy, and demonstrates the utility of tryptophan and kynurenine as biomarkers for this syndrome, particularly in identifying those at risk for hyporesponsivity to oral vaccines.
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Affiliation(s)
- Margaret N Kosek
- Department of International Health, Johns Hopkins School of Public Health, Baltimore, Maryland
| | - Estomih Mduma
- Global Health Research Center, Haydom Lutheran Hospital, Manyara, Tanzania
| | | | - Gwenyth O Lee
- Department of Global Community Health and Behavioral Sciences, Tulane University, New Orleans, Louisiana
| | | | - William K Y Pan
- Duke Global Health Institute, Nicholas School of Environment, Duke University, Durham, North Carolina
| | - Maribel Paredes Olortegui
- Asociacion Benefica Proyectos de Informática, Salud, Medicina, y Agricultura (PRISMA), Iquitos, Peru
| | - Jay H Bream
- Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Crystal Patil
- Department of Women, Children, and Family Health Science, University of Illinois at Chicago College of Nursing, Chicago, Illinois
| | | | | | - Laura E Caulfield
- Department of International Health, Johns Hopkins School of Public Health, Baltimore, Maryland
| | - Jean Gratz
- Center for Global Health, University of Virginia, Charlottesville, Virginia
| | - Pablo Peñataro Yori
- Department of International Health, Johns Hopkins School of Public Health, Baltimore, Maryland
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81
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Ambikapathi R, Kosek MN, Lee GO, Mahopo C, Patil CL, Maciel BL, Turab A, Islam MM, Ulak M, Bose A, Paredes Olortegui M, Pendergast LL, Murray-Kolb LE, Lang D, McCormick BJJ, Caulfield LE. How multiple episodes of exclusive breastfeeding impact estimates of exclusive breastfeeding duration: report from the eight-site MAL-ED birth cohort study. Matern Child Nutr 2016; 12:740-56. [PMID: 27500709 PMCID: PMC5095788 DOI: 10.1111/mcn.12352] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Revised: 06/02/2016] [Accepted: 06/07/2016] [Indexed: 11/28/2022]
Abstract
The duration of exclusive breastfeeding (EBF) is often defined as the time from birth to the first non‐breast milk food/liquid fed (EBFLONG), or it is estimated by calculating the proportion of women at a given infant age who EBF in the previous 24 h (EBFDHS). Others have measured the total days or personal prevalence of EBF (EBFPREV), recognizing that although non‐EBF days may occur, EBF can be re‐initiated for extended periods. We compared breastfeeding metrics in the MAL‐ED study; infants' breastfeeding trajectories were characterized from enrollment (median 7 days, IQR: 4, 12) to 180 days at eight sites. During twice‐weekly surveillance, caretakers were queried about infant feeding the prior day. Overall, 101 833 visits and 356 764 child days of data were collected from 1957 infants. Median duration of EBFLONG was 33 days (95% CI: 32–36), compared to 49 days based on the EBFDHS. Median EBFPREV was 66 days (95% CI: 62–70). Differences were because of the return to EBF after a non‐EBF period. The median number of returns to EBF was 2 (IQR: 1, 3). When mothers re‐initiated EBF (second episode), infants gained an additional 18.8 days (SD: 25.1) of EBF, and gained 13.7 days (SD: 18.1) (third episode). In settings where women report short gaps in EBF, programmes should work with women to return to EBF. Interventions could positively influence the duration of these additional periods of EBF and their quantification should be considered in impact evaluation studies. © 2016 John Wiley & Sons Ltd
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Affiliation(s)
- Ramya Ambikapathi
- Fogarty International Center, National Institutes of Health, Bethesda, Maryland, USA.,Center for Human Nutrition, Department of International Health, The Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Margaret N Kosek
- Center for Human Nutrition, Department of International Health, The Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Gwenyth O Lee
- Center for Human Nutrition, Department of International Health, The Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Cloupas Mahopo
- Department of Nutrition, School of Health Sciences, University of Venda, Thohoyandou, Limpopo Province, South Africa
| | - Crystal L Patil
- Department of Women, Children and Family Health Science, College of Nursing, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Bruna L Maciel
- Department of Nutrition, State University of Ceará, Fortaleza, Ceará, Brazil
| | - Ali Turab
- Department of Paediatrics and Child Health, Aga Khan University, Karachi, Pakistan
| | - M Munirul Islam
- Centre for Nutrition and Food Security, International Centre for Diarrhoeal Disease Research, Dhaka, Bangladesh
| | - Manjeswori Ulak
- Department of Child Health and Institute of Medicine, Tribhuvan University, Kathmandu, Nepal
| | | | | | - Laura L Pendergast
- School Psychology Program, Temple University, Philadelphia, Pennsylvania, USA
| | - Laura E Murray-Kolb
- Department of Nutritional Sciences, The Pennsylvania State University, State College, Pennsylvania, USA
| | - Dennis Lang
- Fogarty International Center, National Institutes of Health, Bethesda, Maryland, USA
| | | | - Laura E Caulfield
- Center for Human Nutrition, Department of International Health, The Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA.
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82
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Faubion WA, Camilleri M, Murray JA, Kelly P, Amadi B, Kosek MN, Enders F, Larson J, Grover M, Boe G, Dyer R, Singh R. Improving the detection of environmental enteric dysfunction: a lactulose, rhamnose assay of intestinal permeability in children aged under 5 years exposed to poor sanitation and hygiene. BMJ Glob Health 2016; 1:e000066. [PMID: 28588929 PMCID: PMC5321325 DOI: 10.1136/bmjgh-2016-000066] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [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: 04/18/2016] [Revised: 06/07/2016] [Accepted: 06/08/2016] [Indexed: 12/01/2022] Open
Abstract
Background Environmental enteric dysfunction (EED) is an asymptomatic intestinal disorder affecting populations living in conditions of poor sanitation and hygiene. The study tested intestinal barrier function in infants with EED. Methods We prospectively studied an advanced high-performance liquid chromatography mass spectrometry assay of urine collected after oral intake of the monosaccharide, L-rhamnose and the disaccharide, lactulose, in 112 children from three continents. Findings Compared to the US cohort (n=27), the cohorts of children from Peru (n=19) and Zambia (n=85) were older with evidence of growth impairment. The median (range) of age (months) was 8.0 (2.0 to 13.0), 27.0 (15.0 to 29.0) and 21.0 (12.0 to 36.0), respectively. The median (range) of height for age Z score was −0.1 (−1.8 to 2.4), −1.8 (−3.3 to −0.2) and −2.3 (−8.5 to 1.2), respectively. Among children with valid sugar data (n=22 USA, n=19 Peru, n=73 Zambia), there were no significant differences in the median rhamnose urine concentrations between the three groups. The median (range) lactulose concentration (µg/mL) was 6.78 (0.29 to 31.90), 47.60 (4.23 to 379.00) and 75.40 (0.67 to 873.00) in the US, Peruvian and Zambian cohorts, respectively (p<0.001). The lactulose/rhamnose ratio (LRR) was higher in cohorts from Peru (0.75, 0.15, 5.02) and Zambia (2.26, 0.08, 14.48) compared to the US (0.14, 0.06, 1.00) cohort (p<0.001). In a multivariate effect modification model, higher weight-for-age z scores were associated with lower post-dose lactulose when rhamnose excretion was constant (p=0.003). Conclusions This non-invasive two saccharide permeability protocol measures changes in intestinal permeability in children with EED and permits the identification of individuals for interventional trials.
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Affiliation(s)
- W A Faubion
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
| | - M Camilleri
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
| | - J A Murray
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
| | - P Kelly
- Queen Mary, University of London, University of Zambia School of Medicine, London, UK
| | - B Amadi
- Queen Mary, University of London, University of Zambia School of Medicine, London, UK
| | - M N Kosek
- Department of International Health, John's Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - F Enders
- Biomedical Statistics and Informatics, Mayo Clinic, Rochester, Minnesota, USA
| | - J Larson
- Biomedical Statistics and Informatics, Mayo Clinic, Rochester, Minnesota, USA
| | | | - G Boe
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, Minnesota, USA
| | - R Dyer
- Immunochemical Core Laboratory, Mayo Clinic, Rochester, Minnesota, USA
| | - R Singh
- Immunochemical Core Laboratory, Mayo Clinic, Rochester, Minnesota, USA
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83
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Rouhani S, Peñataro Yori P, Paredes Olortegui M, Siguas Salas M, Rengifo Trigoso D, Mondal D, Bodhidatta L, Platts-Mills J, Samie A, Kabir F, Lima A, Babji S, Mason CJ, Kalam A, Bessong P, Ahmed T, Mduma E, Bhutta ZA, Lima I, Ramdass R, Lang D, George A, Zaidi AKM, Kang G, Houpt E, Kosek MN. Norovirus Infection and Acquired Immunity in 8 Countries: Results From the MAL-ED Study. Clin Infect Dis 2016; 62:1210-7. [PMID: 27013692 PMCID: PMC4845786 DOI: 10.1093/cid/ciw072] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [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: 09/04/2015] [Accepted: 12/22/2015] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Norovirus is an important cause of childhood diarrhea. We present data from a longitudinal, multicountry study describing norovirus epidemiology during the first 2 years of life. METHODS A birth cohort of 1457 children across 8 countries contributed 7077 diarrheal stools for norovirus testing. A subset of 199 children contributed additional asymptomatic samples (2307) and diarrheal stools (770), which were used to derive incidence rates and evaluate evidence for acquired immunity. RESULTS Across sites, 89% of children experienced at least 1 norovirus infection before 24 months, and 22.7% of all diarrheal stools were norovirus positive. Severity of norovirus-positive diarrhea was comparable to other enteropathogens, with the exception of rotavirus. Incidence of genogroup II (GII) infection was higher than genogroup I and peaked at 6-11 months across sites. Undernutrition was a risk factor for symptomatic norovirus infection, with an increase in 1 standard deviation of length-for-age z score associated with a 17% reduction (odds ratio, 0.83 [95% confidence interval, .72-.97]; P = .011) in the odds of experiencing diarrhea when norovirus was present, after accounting for genogroup, rotavirus vaccine, and age. Evidence of acquired immunity was observed among GII infections only: Children with prior GII infection were found to have a 27% reduction in the hazard of subsequent infection (hazard ratio, 0.727; P = .010). CONCLUSIONS The high prevalence of norovirus across 8 sites in highly variable epidemiologic settings and demonstration of protective immunity for GII infections provide support for investment in vaccine development.
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Affiliation(s)
| | | | | | | | | | - Dinesh Mondal
- International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka
| | | | | | | | | | - Aldo Lima
- Universidade Federal do Ceará, Fortaleza, Brazil
| | | | - Carl J Mason
- Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | - Adil Kalam
- Aga Khan University, Naushahro Feroze, Pakistan
| | | | - Tahmeed Ahmed
- International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka
| | | | | | - Ila Lima
- Universidade Federal do Ceará, Fortaleza, Brazil
| | | | - Dennis Lang
- Foundation for the National Institutes of Health, Bethesda, Maryland
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84
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Manrique P, Hoshi M, Fasabi M, Nolasco O, Yori P, Calderón M, Gilman RH, Kosek MN, Vinetz JM, Gamboa D. Assessment of an automated capillary system for Plasmodium vivax microsatellite genotyping. Malar J 2015; 14:326. [PMID: 26293655 PMCID: PMC4546211 DOI: 10.1186/s12936-015-0842-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [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: 03/24/2015] [Accepted: 08/08/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Several platforms have been used to generate the primary data for microsatellite analysis of malaria parasite genotypes. Each has relative advantages but share a limitation of being time- and cost-intensive. A commercially available automated capillary gel cartridge system was assessed in the microsatellite analysis of Plasmodium vivax diversity in the Peruvian Amazon. METHODS The reproducibility and accuracy of a commercially-available automated capillary system, QIAxcel, was assessed using a sequenced PCR product of 227 base pairs. This product was measured 42 times, then 27 P. vivax samples from Peruvian Amazon subjects were analyzed with this instrument using five informative microsatellites. Results from the QIAxcel system were compared with a Sanger-type sequencing machine, the ABI PRISM(®) 3100 Genetic Analyzer. RESULTS Significant differences were seen between the sequenced amplicons and the results from the QIAxcel instrument. Different runs, plates and cartridges yielded significantly different results. Additionally, allele size decreased with each run by 0.045, or 1 bp, every three plates. QIAxcel and ABI PRISM systems differed in giving different values than those obtained by ABI PRISM, and too many (i.e. inaccurate) alleles per locus were also seen with the automated instrument. CONCLUSIONS While P. vivax diversity could generally be estimated using an automated capillary gel cartridge system, the data demonstrate that this system is not sufficiently precise for reliably identifying parasite strains via microsatellite analysis. This conclusion reached after systematic analysis was due both to inadequate precision and poor reproducibility in measuring PCR product size.
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Affiliation(s)
- Paulo Manrique
- Malaria Laboratory, Institute of Tropical Medicine Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Peru.
| | - Mari Hoshi
- Malaria Laboratory, Institute of Tropical Medicine Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Peru.
| | | | - Oscar Nolasco
- Malaria Laboratory, Institute of Tropical Medicine Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Peru.
| | - Pablo Yori
- Department of International Health, Johns Hopkins School of Public Health, Baltimore, MD, USA.
| | - Martiza Calderón
- Division of Infectious Diseases, Department of Medicine, University of California San Diego, La Jolla, CA, USA.
| | - Robert H Gilman
- Department of International Health, Johns Hopkins School of Public Health, Baltimore, MD, USA.
| | - Margaret N Kosek
- Department of International Health, Johns Hopkins School of Public Health, Baltimore, MD, USA.
| | - Joseph M Vinetz
- Malaria Laboratory, Institute of Tropical Medicine Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Peru. .,Division of Infectious Diseases, Department of Medicine, University of California San Diego, La Jolla, CA, USA.
| | - Dionicia Gamboa
- Malaria Laboratory, Institute of Tropical Medicine Alexander von Humboldt, Universidad Peruana Cayetano Heredia, Lima, Peru. .,Departamento de Ciencias Celulares y Moleculares, Universidad Peruana Cayetano Heredia, Lima, Peru.
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85
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Mirelman AJ, Ballard SB, Saito M, Kosek MN, Gilman RH. Cost-effectiveness of norovirus vaccination in children in Peru. Vaccine 2015; 33:3084-91. [PMID: 25980428 DOI: 10.1016/j.vaccine.2015.05.004] [Citation(s) in RCA: 7] [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: 02/02/2015] [Revised: 04/28/2015] [Accepted: 05/04/2015] [Indexed: 12/11/2022]
Abstract
BACKGROUND With candidate norovirus (NV) vaccines in a rapid phase of development, assessment of the potential economic value of vaccine implementation will be necessary to aid health officials in vaccine implementation decisions. To date, no evaluations have been performed to evaluate the benefit of adopting NV vaccines for use in the childhood immunization programs of low- and middle-income countries. METHODS We used a Markov decision model to evaluate the cost-effectiveness of adding a two-dose NV vaccine to Peru's routine childhood immunization schedule using two recent estimates of NV incidence, one for a peri-urban region and one for a jungle region of the country. RESULTS Using the peri-urban NV incidence estimate, the annual cost of vaccination would be $13.0 million, offset by $2.6 million in treatment savings. Overall, this would result in 473 total DALYs averted; 526,245 diarrhea cases averted;153,735 outpatient visits averted; and 414 hospitalizations averted between birth and the fifth year of life. The incremental cost-effectiveness ratio would be $21,415 per DALY averted; $19.86 per diarrhea case; $68.23 per outpatient visit; and $26,298 per hospitalization. Using the higher jungle NV incidence rates provided a lower cost per DALY of $10,135. The incremental cost per DALY with per-urban NV incidence is greater than three times the 2012 GDP per capita of Peru but the estimate drops below this threshold using the incidence from the jungle setting. In addition to the impact of incidence, sensitivity analysis showed that vaccine price and efficacy play a strong role in determining the level of cost-effectiveness. CONCLUSIONS The introduction of a NV vaccine would prevent many healthcare outcomes in the Peru and potentially be cost-effective in scenarios with high NV incidence. The vaccine cost-effectiveness model could also be applied to the evaluation of NV vaccine cost-effectiveness in other countries. In resource-poor settings, where NV incidence rates are expected to be higher.
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Affiliation(s)
- Andrew J Mirelman
- Centre for Health Economics, University of York, Heslington, United Kingdom
| | - Sarah Blythe Ballard
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA.
| | - Mayuko Saito
- Department of Virology, Tohoku University Graduate School of Medicine, Sendai, Japan; Asociación Benéfica PRISMA, Lima, Peru
| | - Margaret N Kosek
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Robert H Gilman
- Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA; Laboratorios de Investigación y Desarrollo, Universidad Peruana Cayetano Heredia, Lima, Peru
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86
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Oberhelman RA, Kosek MN, Peñataro-Yori P, Paredes-Olórtegui M, Connolly E. A phase one safety study of Lactobacillus reuteri conducted in the Peruvian Amazon: Observations from the field. Am J Trop Med Hyg 2014; 90:777-80. [PMID: 24515943 DOI: 10.4269/ajtmh.13-0639] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Clinical research on probiotics presents challenging issues for researchers, regulators, and funding agencies, and these issues become more complex when United States federally funded research is conducted outside the United States. Here, we describe the design and results of a Phase I safety study of Lactobacillus reuteri DSM 17938 conducted as a community-based trial under the Food and Drug Administration Investigative New Drug (FDA IND) program in a small town in the Peruvian Amazon. Forty-five healthy adults 18 to 65 years of age were randomized in a 2:1 ratio to receive either Lactobacillus reuteri 10(8) organisms once daily for 5 days or an identical appearing placebo. Results showed no evidence of invasive infection resulting from probiotic administration and no differences between groups. Although we encountered several challenges in conducting an FDA-approved safety trial in this setting, the rigorously collected contextually relevant data will be very valuable to support later Phase II/III studies of L. reuteri for use in similar settings.
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Affiliation(s)
- Richard A Oberhelman
- Tulane School of Public Health and Tropical Medicine, New Orleans, Louisiana; Department of International Health, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland; Asociación Benéfica Prisma, Unidad de Investigaciones Biomédicas, Iquitos, Peru; Infant Bacterial Therapeutics AB, Gamla Brogatan 11, 111 20 Stockholm, Sweden
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Peterson KM, Buss J, Easley R, Yang Z, Korpe PS, Niu F, Ma JZ, Olortegui MP, Haque R, Kosek MN, Petri WA. REG1B as a predictor of childhood stunting in Bangladesh and Peru. Am J Clin Nutr 2013; 97:1129-33. [PMID: 23553156 PMCID: PMC3628379 DOI: 10.3945/ajcn.112.048306] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Undernutrition remains a significant problem worldwide, with environmental enteropathy implicated as a contributing factor. An understanding of the pathogenesis and identification of children at risk are critical to the design of more-effective interventions. OBJECTIVE The stool regenerating gene 1β (REG1B) protein, which is a putative measure of intestinal injury and repair, was tested as a noninvasive biomarker of future childhood stunting. DESIGN A total of 222 children from Bangladesh and 97 children from Peru, who were from impoverished communities, were followed from birth through 24 mo of age with anthropometric measures obtained every 3 mo. Stool REG1B protein concentrations were obtained by using an REG1B polyclonal-polyclonal ELISA at 3 mo of age. We tested for the ability of REG1B to forecast future anthropometric shortfalls, independent of known predictors of undernutrition of family income and baseline height and weight. RESULTS In the Bangladesh cohort of 222 children, higher REG1B concentrations at month 3 were significantly and independently associated with a growth shortfall in a linear regression analysis at months 9, 12, 18, 21, and 24 and, in the Peru cohort, at months 12, 15, 18, 21, and 24. With the use of a mixed model for repeated measurements, higher stool REG1B concentrations at 3 mo were also independently predictive of a lower future length-for-age z score through 24 mo of age (Bangladesh P = 0.006; Peru P = 0.058). CONCLUSION The ability of fecal REG1B to predict growth shortfall in independent cohorts of impoverished children from the developing world offers promise as a malnutrition biomarker and supports a role for environmental enteropathy in the pathogenesis of growth shortfall.
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