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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
immunology and microbiology
Schistosoma co-infection protects against brain pathology but does not prevent severe disease and death in a murine model of cerebral malaria
International Journal for Parasitology, Volume 41, No. 1, Year 2011
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Description
Co-infections of helminths and malaria parasites are common in human populations in most endemic areas. It has been suggested that concomitant helminth infections inhibit the control of malaria parasitemia but down-modulate severe malarial disease. We tested this hypothesis using a murine co-infection model of schistosomiasis and cerebral malaria. C57BL/6 mice were infected with Schistosoma mansoni and 8-9. weeks later, when Schistosoma infection was patent, mice were co-infected with Plasmodium berghei ANKA strain. We found that a concomitant Schistosoma infection increased parasitemia at the beginning of the P. berghei infection. It did not protect against P. berghei-induced weight loss and hypothermia, and P. berghei-mono-infected as well as S. mansoni-P. berghei-co-infected animals showed a high case fatality between days 6 and 8 of malarial infection. However, co-infection significantly reduced P. berghei-induced brain pathology. Over 40% of the S. mansoni-P. berghei-co-infected animals that died during this period were completely protected against haemorrhaging, plugging of blood vessels and infiltration, indicating that mortality in these animals was not related to cerebral disease. Schistosoma mansoni-P. berghei-co-infected mice had elevated plasma concentrations of IL-5 and IL-13 and on day 6 lower levels of IFN-γ, IL-10, monocyte chemoattractant protein-1 (MCP-1) and monokine induced by IFN-γ (MIG) than P. berghei-mono-infected mice. We conclude that in P. berghei infections, disease and early death are caused by distinct pathogenic mechanisms, which develop in parallel and are differentially influenced by the immune response to S. mansoni. This might explain why, in co-infected mice, death could be induced in the absence of brain pathology. © 2010 Australian Society for Parasitology Inc.
Authors & Co-Authors
Bucher, Kirsten
Germany, Tubingen
Eberhard Karls Universität Tübingen
Dietz, Klaus
Germany, Tubingen
Eberhard Karls Universität Tübingen
Lackner, Peter
Austria, Innsbruck
Medizinische Universitat Innsbruck
Fendel, Rolf
Germany, Tubingen
Eberhard Karls Universität Tübingen
Mordmüller, Benjamin G.
Germany, Tubingen
Eberhard Karls Universität Tübingen
Ben-Smith, Anne W.
Unknown Affiliation
Hoffmann, Wolfgang H.
Germany, Tubingen
Eberhard Karls Universität Tübingen
Statistics
Citations: 27
Authors: 7
Affiliations: 3
Identifiers
Doi:
10.1016/j.ijpara.2010.06.008
ISSN:
00207519
Research Areas
Infectious Diseases