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          Institute: MPI für Evolutionsbiologie     Collection: Evolutionary ecology     Display Documents

ID: 284868.0, MPI für Evolutionsbiologie / Evolutionary ecology
Resistance against heterogeneous sequential infections: experimental studies with a tapeworm and its copepod host
Authors:Kurtz, J.; Hammerschmidt, K.
Date of Publication (YYYY-MM-DD):2006-06
Title of Journal:Journal of Helminthology
Issue / Number:2
Start Page:199
End Page:206
Review Status:not specified
Audience:Not Specified
Abstract / Description:Parasite heterogeneity is thought to be an important factor influencing the likelihood and the dynamics of infection. Previous studies have demonstrated that simultaneous exposure of hosts to a heterogeneous mixture of parasites might increase infection success. Here this view is extended towards the effect of parasite heterogeneity on subsequent infections. Using a system of the tapeworm Schistocephalus solidus and its copepod intermediate host, heterogeneity of the tapeworm surface carbohydrates is investigated, i.e. structures that are potentially recognized by the invertebrate host's immune system. With lectin labelling, a significant proportion of variation in surface carbohydrates is related to differences in worm sibships (i.e. families). Tapeworm sibships were used for experimental exposure of copepods to either homogeneous combinations of tapeworm larvae, i.e. worms derived from the same sibship or heterogeneous mixtures of larvae, and copepods were subsequently challenged with an unrelated larva to study re-infection. Contrary to expectation, neither an effect of parasite heterogeneity on the current infection, nor on re-infection were found. The effect of parasitic heterogeneity on host immunity is therefore complex, potentially involving increased cross-protection on the one hand, with higher costs of raising a more heterogeneous immune response on the other.
External Publication Status:published
Document Type:Article
Affiliations:MPI für Limnologie/Abt. Evolutionsökologie
External Affiliations:ETH Zentrum, ETH Zürich, CHN J12-1,Univ Str 16, Zürich, CH-8092 Switzerland
Identifiers:ISSN:0022-149X [ID-No:1]
DOI:10.1079/JOH2006349 [ID-No:2]
LOCALID:2469/s 38498 [Listen-Nummer/S-Nummer]
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