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Ahmed AMS, Soares Magalhaes RJ, Long KZ, Ahmed T, Alam MA, Hossain MI, Islam MM, Mahfuz M, Mondal D, Haque R, Mamun AA. Association of vitamin D status with incidence of enterotoxigenic, enteropathogenic and enteroaggregative Escherichia coli diarrhoea in children of urban Bangladesh. Trop Med Int Health 2016; 21:973-984. [PMID: 27253178 DOI: 10.1111/tmi.12731] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
OBJECTIVE To evaluate the association between vitamin D status and diarrhoeal episodes by enterotoxigenic (ETEC), enteropathogenic (EPEC) and enteroaggregative (EAEC) E. coli in underweight and normal-weight children aged 6-24 months in urban Bangladesh. METHODS Cohorts of 446 normal-weight and 466 underweight children were tested separately for ETEC, EPEC and EAEC from diarrhoeal stool samples collected during 5 months of follow-up while considering vitamin D status at enrolment as the exposure. Cox proportional hazards models with unordered failure events of the same type were used to determine diarrhoeal risk factors after adjusting for sociodemographic and concurrent micronutrient status. RESULTS Vitamin D status was not independently associated with the risk of incidence of ETEC, EPEC and EAEC diarrhoea in underweight children, but moderate-to-severe retinol deficiency was associated with reduced risk for EPEC diarrhoea upon adjustment. Among normal-weight children, insufficient vitamin D status and moderate-to-severe retinol deficiency were independently associated with 44% and 38% reduced risk of incidence of EAEC diarrhoea, respectively. These children were at higher risk of ETEC diarrhoea with vitamin D deficiency status when adjusted for micronutrient status only. CONCLUSION This study demonstrates for the first time that normal-weight children with insufficient vitamin D status have a reduced risk of EAEC diarrhoea than children with sufficient status. Moderate-to-severe deficiency of serum retinol is associated with reduced risk of EPEC and EAEC diarrhoea in underweight and normal-weight children.
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Affiliation(s)
- A M S Ahmed
- School of Public Health, The University of Queensland, Brisbane, Qld, Australia.,Nutrition and Clinical Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - R J Soares Magalhaes
- School of Veterinary Science, The University of Queensland, Gatton, Qld, Australia.,Child Health Research Centre, The University of Queensland, Brisbane, Qld, Australia
| | - K Z Long
- Child Health Research Centre, The University of Queensland, Brisbane, Qld, Australia.,Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland
| | - T Ahmed
- Nutrition and Clinical Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - Md A Alam
- Nutrition and Clinical Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - Md I Hossain
- Nutrition and Clinical Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - Md M Islam
- Nutrition and Clinical Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - M Mahfuz
- Nutrition and Clinical Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - D Mondal
- Nutrition and Clinical Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - R Haque
- Nutrition and Clinical Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
| | - A A Mamun
- School of Public Health, The University of Queensland, Brisbane, Qld, Australia.,Nutrition and Clinical Services Division, International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh
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Ahmed AMS, Magalhaes RJS, Ahmed T, Long KZ, Hossain M, Islam MM, Mahfuz M, Gaffar SMA, Sharmeen A, Haque R, Guerrant RL, Petri WA, Mamun AA. Vitamin-D status is not a confounder of the relationship between zinc and diarrhoea: a study in 6-24-month-old underweight and normal-weight children of urban Bangladesh. Eur J Clin Nutr 2016; 70:620-8. [PMID: 26956127 DOI: 10.1038/ejcn.2016.7] [Citation(s) in RCA: 4] [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] [Received: 07/15/2015] [Revised: 10/23/2015] [Accepted: 11/26/2015] [Indexed: 12/20/2022]
Abstract
BACKGROUND/OBJECTIVE The role of micronutrients particularly zinc in childhood diarrhoea is well established. Immunomodulatory functions of vitamin-D in diarrhoea and its role in the effect of other micronutrients are not well understood. This study aimed to investigate whether vitamin-D directly associated or confounded the association between other micronutrient status and diarrhoeal incidence and severity in 6-24-month underweight and normal-weight children in urban Bangladesh. SUBJECTS/METHODS Multivariable generalised estimating equations were used to estimate incidence rate ratios for incidence (Poisson) and severity (binomial) of diarrhoea on cohorts of 446 normal-weight and 466 underweight children. Outcomes of interest included incidence and severity of diarrhoea, measured daily during a follow-up period of 5 months. The exposure of interest was vitamin-D status at enrolment. RESULTS Normal-weight and underweight children contributed 62 117 and 62 967 day observation, with 14.2 and 12.8 days/child/year of diarrhoea, respectively. None of the models showed significant associations of vitamin-D status with diarrhoeal morbidity. In the final model, zinc-insufficient normal-weight children had 1.3 times more days of diarrhoea than sufficient children (P<0.05). Again zinc insufficiency and mother's education (1-5 and >5 years) had 1.8 and 2.3 times more risk of severe diarrhoea. In underweight children, older age and female had 24-63 and 17% fewer days of diarrhoea and 52-54 and 31% fewer chances of severe diarrhoea. CONCLUSION Vitamin-D status was not associated with incidence and severity of diarrhoea in study children. Role of zinc in diarrhoea was only evident in normal-weight children. Our findings demonstrate that vitamin-D is not a confounder of the relationship between zinc and diarrhoea.
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Affiliation(s)
- A M S Ahmed
- School of Public Health, The University of Queensland, Brisbane, QLD, Australia.,Centre for Nutrition and Food Security, International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh
| | - R J S Magalhaes
- School of Veterinary Science, The University of Queensland, Gatton, QLD, Australia.,Child Health Research Centre, The University of Queensland, Brisbane, QLD, Australia
| | - T Ahmed
- Centre for Nutrition and Food Security, International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh
| | - K Z Long
- School of Public Health, The University of Queensland, Brisbane, QLD, Australia.,Department of Epidemiology and Public Health, Swiss Tropical and Public Health Institute, Basel, Switzerland
| | - MdI Hossain
- Centre for Nutrition and Food Security, International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh
| | - M M Islam
- Centre for Nutrition and Food Security, International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh
| | - M Mahfuz
- Centre for Nutrition and Food Security, International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh
| | - S M A Gaffar
- Centre for Nutrition and Food Security, International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh
| | - A Sharmeen
- Centre for Nutrition and Food Security, International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh
| | - R Haque
- Centre for Nutrition and Food Security, International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh
| | - R L Guerrant
- Division of Infectious Diseases and International Health, Department of Internal Medicine, University of Virginia, Charlottesville, VA, USA
| | - W A Petri
- Division of Infectious Diseases and International Health, Department of Internal Medicine, University of Virginia, Charlottesville, VA, USA
| | - A A Mamun
- School of Public Health, The University of Queensland, Brisbane, QLD, Australia.,Centre for Nutrition and Food Security, International Centre for Diarrhoeal Disease Research, Bangladesh (icddr,b), Dhaka, Bangladesh
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Samadpour K, Long KZ, Hayatbakhsh R, Marks GC. Randomised comparison of the effects of Sprinkles and Foodlets with the currently recommended supplement (Drops) on micronutrient status and growth in Iranian children. Eur J Clin Nutr 2011; 65:1287-94. [PMID: 21750564 DOI: 10.1038/ejcn.2011.124] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND/OBJECTIVES Multiple micronutrient supplementation with Sprinkles powder and crushable Foodlets tablets may be effective means of controlling micronutrient deficiencies in infants. Their efficacy has not been tested in countries like Iran where wheat as the staple food may affect nutrient bioavailability. This study aimed to compare the efficacy of Sprinkles, Foodlets and the current supplement (Drops) for improving micronutrient status and growth among Iranian infants. SUBJECTS/METHODS Infants of 6-18 months of age, living in an urban district of Iran were randomised to receive daily Sprinkles (n=120), Foodlets (n=121) or Drops (n=121) for 4 months. Haemoglobin (Hb), serum ferritin, serum retinol, serum zinc, 25(OH) D concentration and anthropometry were assessed at baseline and at 4 months. RESULTS Iron status improved with all treatments. Drops showed significantly greater changes in Hb and serum ferritin, though changes in anaemia prevalence were not different across groups. Infants having Foodlets and Sprinkles had significantly greater reductions in proportion of children with zinc deficiency compared with Drops. No significant differences in treatment effects were observed for mean serum 25(OH) D and retinol, or for growth of infants across groups. CONCLUSION The study was the first efficacy trial with Sprinkles and Foodlets in the Middle East where wheat or rice is the principal complementary foods. Differences across treatment groups were largely consistent with supplement micronutrient composition for iron and zinc, with no benefit in this population for serum retinol, 25(OH) D, growth or anthropometric status. The trial identified trade-offs in combining multiple micronutrients in a single delivery mechanism.
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Affiliation(s)
- K Samadpour
- School of Population Health, The University of Queensland, Brisbane, Queensland, Australia
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Long KZ, Wood JW, Vasquez Gariby E, Weiss KM, Mathewson JJ, de la Cabada FJ, DuPont HL, Wilson RA. Proportional hazards analysis of diarrhea due to enterotoxigenic Escherichia coli and breast feeding in a cohort of urban Mexican children. Am J Epidemiol 1994; 139:193-205. [PMID: 8296786 DOI: 10.1093/oxfordjournals.aje.a116981] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Ninety-eight women-infant pairs were followed for up to 50 weeks in the northern part of Guadalajara, Mexico, from August 1986 to July 1987 as part of a community-based, prospective study of the relation between infant feeding patterns and enterotoxigenic Escherichia coli producing heat-labile toxin (LT-ETEC) diarrheal disease. Strictly formula-fed children had an incidence of diarrhea over three times that of strictly breast-fed infants and twice that of breast-fed and supplementally fed children. Strictly formula-fed infants colonized by LT-ETEC were symptomatic for diarrhea nearly three times as often as strictly breast-fed infants and twice as often as infants receiving a mixed diet. The fitting of parametric hazard models to durations until LT-ETEC colonization revealed that the hazard for the first colonization was time invariant. The hazard of diarrhea increased by 400-500% during the rainy season or among children 3 months of age or older who received avena, a barley drink. The best-fitting hazard models to durations until symptomatic expression of LT-ETEC infection all increased through time. This hazard was inversely impacted by the overall amount of LT-ETEC-specific, immunoglobulin A antibodies the infant received via the mother's breast milk and by the provision of traditional medicinal teas.
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Affiliation(s)
- K Z Long
- Division of Population Dynamics and Epidemiology, Instituto Nacional de Salud Publica, Secretaria de Salud y Asistencia, Cuernavaca, Morelos, Mexico
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