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Associations Between Helminth Infections, Plasmodium falciparum Parasite Carriage and Antibody Responses to Sexual and Asexual Stage Malarial Antigens

Infections with helminths and Plasmodium spp. overlap in their geographical distribution. It has been postulated that helminth infections may influence malarial transmission by altering Plasmodium falciparum gametocytogenesis. This cross-sectional study assessed the effect of helminth infections on...

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Published in:The American journal of tropical medicine and hygiene 2016-08, Vol.95 (2), p.394-400
Main Authors: Ateba-Ngoa, Ulysse, Jones, Sophie, Zinsou, Jeannot Fréjus, Honkpehedji, Josiane, Adegnika, Ayola Akim, Agobe, Jean-Claude Dejon, Massinga-Loembe, Marguerite, Mordmüller, Benjamin, Bousema, Teun, Yazdanbakhsh, Maria
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container_title The American journal of tropical medicine and hygiene
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creator Ateba-Ngoa, Ulysse
Jones, Sophie
Zinsou, Jeannot Fréjus
Honkpehedji, Josiane
Adegnika, Ayola Akim
Agobe, Jean-Claude Dejon
Massinga-Loembe, Marguerite
Mordmüller, Benjamin
Bousema, Teun
Yazdanbakhsh, Maria
description Infections with helminths and Plasmodium spp. overlap in their geographical distribution. It has been postulated that helminth infections may influence malarial transmission by altering Plasmodium falciparum gametocytogenesis. This cross-sectional study assessed the effect of helminth infections on P. falciparum gametocyte carriage and on humoral immune responses to sexual stage antigens in Gabon. Schistosoma haematobium and filarial infections as well as P. falciparum asexual forms and gametocyte carriage were determined. The antibody responses measured were to sexual (Pfs230, Pfs48/45) and asexual P. falciparum antigens (AMA1, MSP1, and GLURP). A total of 287 subjects were included. The prevalence of microscopically detectable P. falciparum asexual parasites was higher in S. haematobium-infected subjects in comparison to their uninfected counterparts (47% versus 26%, P = 0.003), but this was not different when filarial infections were considered. Plasmodium falciparum gametocyte carriage was similar between Schistosoma- or filaria-infected and uninfected subjects. We observed a significant decrease of Pfs48/45 immunoglobulin G titer in S. haematobium-infected subjects (P = 0.037), whereas no difference was seen for Pfs230 antibody titer, nor for antibodies to AMA1, MSP1, or GLURP. Our findings suggest an effect of S. haematobium on antibody responses to some P. falciparum gametocyte antigens that may have consequences for transmission-blocking immunity.
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It has been postulated that helminth infections may influence malarial transmission by altering Plasmodium falciparum gametocytogenesis. This cross-sectional study assessed the effect of helminth infections on P. falciparum gametocyte carriage and on humoral immune responses to sexual stage antigens in Gabon. Schistosoma haematobium and filarial infections as well as P. falciparum asexual forms and gametocyte carriage were determined. The antibody responses measured were to sexual (Pfs230, Pfs48/45) and asexual P. falciparum antigens (AMA1, MSP1, and GLURP). A total of 287 subjects were included. The prevalence of microscopically detectable P. falciparum asexual parasites was higher in S. haematobium-infected subjects in comparison to their uninfected counterparts (47% versus 26%, P = 0.003), but this was not different when filarial infections were considered. Plasmodium falciparum gametocyte carriage was similar between Schistosoma- or filaria-infected and uninfected subjects. We observed a significant decrease of Pfs48/45 immunoglobulin G titer in S. haematobium-infected subjects (P = 0.037), whereas no difference was seen for Pfs230 antibody titer, nor for antibodies to AMA1, MSP1, or GLURP. Our findings suggest an effect of S. haematobium on antibody responses to some P. falciparum gametocyte antigens that may have consequences for transmission-blocking immunity.</abstract><cop>United States</cop><pub>The American Society of Tropical Medicine and Hygiene</pub><pmid>27273645</pmid><doi>10.4269/ajtmh.15-0703</doi><tpages>7</tpages><oa>free_for_read</oa></addata></record>
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subjects Adolescent
Animals
Antibodies, Protozoan - biosynthesis
Antigens, Protozoan - genetics
Antigens, Protozoan - immunology
Child
Coinfection
Cross-Sectional Studies
Female
Gabon - epidemiology
Gene Expression
Humans
Immunity, Humoral
Life Cycle Stages - genetics
Life Cycle Stages - immunology
Malaria, Falciparum - epidemiology
Malaria, Falciparum - immunology
Malaria, Falciparum - parasitology
Male
Membrane Glycoproteins - genetics
Membrane Glycoproteins - immunology
Membrane Proteins - genetics
Membrane Proteins - immunology
Merozoite Surface Protein 1 - genetics
Merozoite Surface Protein 1 - immunology
Plasmodium falciparum
Plasmodium falciparum - genetics
Plasmodium falciparum - growth & development
Plasmodium falciparum - immunology
Protozoan Proteins - genetics
Protozoan Proteins - immunology
Schistosoma haematobium
Schistosoma haematobium - genetics
Schistosoma haematobium - growth & development
Schistosoma haematobium - immunology
Schistosomiasis haematobia - epidemiology
Schistosomiasis haematobia - immunology
Schistosomiasis haematobia - parasitology
title Associations Between Helminth Infections, Plasmodium falciparum Parasite Carriage and Antibody Responses to Sexual and Asexual Stage Malarial Antigens
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