Document Detail

Virulence reaction norms across a food gradient.
MedLine Citation:
PMID:  15209108     Owner:  NLM     Status:  MEDLINE    
Host-parasite interactions involve competition for nutritional resources between hosts and the parasites growing within them. Consuming part of a host's resources is one cause of a parasite's virulence, i.e. part of the fitness cost imposed on the host by the parasite. The influence of a host's nutritional conditions on the virulence of a parasite was experimentally tested using the mosquito Aedes aegypti and the microsporidian parasite Vavraia culicis. A condition-dependent expression of virulence was found and a positive relation between virulence and transmissibility was established. Spore production was positively influenced by host food availability, indicating that the parasite's within-host growth is limited by host condition. We also investigated how the fitness of each partner varied across the nutritional gradient and demonstrated that the sign of the correlation between host fitness and parasite fitness depended on the amount of nutritional resources available to the host.
Stephanie Bedhomme; Philip Agnew; Christine Sidobre; Yannis Michalakis
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Proceedings. Biological sciences / The Royal Society     Volume:  271     ISSN:  0962-8452     ISO Abbreviation:  Proc. Biol. Sci.     Publication Date:  2004 Apr 
Date Detail:
Created Date:  2004-06-22     Completed Date:  2004-07-20     Revised Date:  2009-11-18    
Medline Journal Info:
Nlm Unique ID:  101245157     Medline TA:  Proc Biol Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  739-44     Citation Subset:  IM    
Centre d'Etudes sur le Polymorphisme des Microorganismes, UMR CNRS-IRD 9926, 911 avenue d'Agropolis BP 64501, 34394 Montpellier 5, France.
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MeSH Terms
Aedes / parasitology*,  physiology
Animal Nutritional Physiological Phenomena
Body Constitution
Competitive Behavior / physiology*
Host-Parasite Interactions
Microsporidia / growth & development*,  pathogenicity*
Models, Biological*
Virulence / physiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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