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Helpful or a Hindrance: Co-infections with Helminths During Malaria

  • Laura E. LaylandEmail author
  • Sabine Specht
Chapter
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 828)

Abstract

A significant proportion of disease burden in resource poor tropical communities is due to parasitic infections. Such chronic ailments not only result in higher rates of morbidity and mortality but effects the overall wealth of the country too. Nevertheless, simply the presence and intensity of infection can lead to malnutrition, anaemia, poor school performances and stunted growth. Thankfully, such issues are becoming prominent in discussions about public health and with the continual improvement in diagnostics it is clear that concurrent polyparasitism remains prominent in underdeveloped rural areas. The risk factors and consequences of polyparasitism appear to depend on a multitude of factors including gender, age, geographical setting, infection intensity and the host’s overall physical health. Co-infections of Plasmodium and helminths are widespread due to the similarities in ecological requirements for disease transmission and strongly influence parasitaemia, anaemia and hepatosplenomegaly. The absolute influence on one another however remains unclear although most studies agree that ascariasis “helps” and hookworms “hinder.” The underlying aetiology also requires further investigation but it is hypothesized that the strong Th2 and regulatory networks induced by the helminths control malaria-induced pro-inflammatory reactions. This chapter surveys our current understanding about how helminths, such as schistosomes and filariae, influence Plasmodium infection in endemic areas. In addition, we provide an overview about the immune mechanisms that have been elucidated in appropriate co-infection rodent models. If our future goals are to assist individuals suffering from severe poverty, then it is essential to consider all aspects of their life-styles including the unfortunate health burden of multiple parasitic burden. Furthermore, understanding the influence of parasites will provide more appropriate control measures that include critical variations in economic and ecological factors in a particular endemic area and may reveal that not one glove fits all.

Keywords

Malaria Helminth-coinfection Filariasis Schistosomiasis Immune-regulation 

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© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Institute of Medical Microbiology, Immunology and Parasitology (IMMIP)University Hospital BonnBonnGermany

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