Effect of nutrient supplementation on the acquisition of humoral immunity to Plasmodium falciparum in young Malawian children

Autor: Priyanka Barua, Upeksha P. Chandrasiri, James G. Beeson, Kathryn G. Dewey, Kenneth Maleta, Per Ashorn, Stephen J. Rogerson
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: Malaria Journal, Vol 17, Iss 1, Pp 1-13 (2018)
Druh dokumentu: article
ISSN: 1475-2875
DOI: 10.1186/s12936-018-2224-6
Popis: Abstract Background There is evidence that suggests that undernutrition has a detrimental effect on malarial immunity in children. The aim of the study was to discover whether nutrient supplementation improved development of malarial antibody immunity in children up to 18 months of age. Methods The study was conducted with a subset of 432 Malawian children from a randomized controlled trial of nutritional supplements. The arms included pre- and postnatal small-quantity lipid-based nutrient supplements for both mother and child; prenatal supplementation with iron and folic acid; and pre- and postnatal supplementation with multiple micronutrients. Paired plasma samples were collected at 6 and 18 months of age. The levels of antibodies against merozoite surface protein 1 (MSP1 19kD) and MSP2, erythrocyte binding antigen 175 (EBA175), reticulocyte binding protein homologue 2A (Rh2A9), schizont extract and variant antigens expressed on the surface of infected erythrocytes were measured. Results At 18 months of age, 5.4% of children were parasitaemic by microscopy and 49.1% were anaemic. Antibodies to the tested merozoite antigens and schizont extract increased between 6 and 18 months and this increase was statistically significant for MSP1, MSP2 and EBA175 (p
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