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- Title
Impact of Vitamin A on Selected Gastrointestinal Pathogen Infections and Associated Diarrheal Episodes among Children in Mexico City Mexico.
- Authors
Long, Kurt Z.; Santos, Jose Ignacio; Rosado, Jorge L.; Lopez-Saucedo, Catalina; Thompson-Bonilla, Rocio; Abonce, Maricela; DuPont, Herbert L.; Hertzmark, Ellen; Estrada-Garcia, Teresa
- Abstract
Background. The overall effect of vitamin A supplementation on diarrheal disease in community trials may result from its effect on specific diarrheal pathogens. Methods. We conducted a placebo-controlled, double-blind trial of the prophylactic effect of vitamin A on gastrointestinal pathogen infections and clinical symptoms among 188 children in Mexico City, Mexico, from January 1998 to May 1999. Children 6–15 months of age were randomly assigned to receive either a vitamin A supplement (for children <12 months of age, 20,000 international units [IU] of retinol; for children ≥12 months of age, 45,000 IU of retinol) every 2 months or a placebo and were followed for up to 15 months. Stool samples, collected semimonthly, were screened for enteropathogenic Escherichia coli (EPEC), enterotoxigenic E. coli (ETEC), Shiga toxin-producing E. coli (STEC), enteroinvasive E. coli (EIEC), and Giardia lamblia. Results. Vitamin A supplementation reduced the prevalence of EPEC infections (rate ratio [RR], 0.52 [95% confidence interval {CI}, 0.23–0.86]) and led to shorter durations of both EPEC and ETEC infections. Supplementation also reduced the prevalence of EPEC-associated diarrhea (RR, 0.41 [95% CI, 0.16–1.00]), EPECassociated fever (RR, 0.15 [95% CI, 0.02–0.98]), and G. lamblia-associated fever (RR, 0.27 [95% CI, 0.13–0.80]). Finally, children who received vitamin A supplementation had shorter durations of EPEC-associated diarrhea than did children who did not receive supplementation but had longer durations of G. lamblia-associated diarrhea. Conclusions. These results suggest that the effect of vitamin A supplementation on clinical outcomes may be pathogen dependent.
- Subjects
MEXICO City (Mexico); MEXICO; VITAMIN A in human nutrition; DIARRHEA in children; VITAMIN A deficiency; GASTROINTESTINAL diseases; PATHOGENIC microorganisms
- Publication
Journal of Infectious Diseases, 2006, Vol 194, Issue 9, p1217
- ISSN
0022-1899
- Publication type
Article
- DOI
10.1086/508292