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Starving the Enemy? Feeding Behavior Shapes Host-Parasite Interactions
Jessica L Hite1, Alaina C Pfenning1, Clayton E Cressler1
1School of Biological Sciences, University of Nebraska, Lincoln, NE 68588, USA.
Trends in Ecology & Evolution
|October 13, 2019
Summary
Illness-mediated anorexia, or appetite loss during infection, can be a host defense or parasite manipulation. Understanding its ecological role is key to managing disease dynamics and evolution.
Area of Science:
- Ecology
- Evolutionary Biology
- Parasitology
Background:
- Illness-mediated anorexia is traditionally viewed as a detrimental byproduct of infection.
- Its ecological influences, disease impact, and evolutionary origins are not well understood.
- Current medical practices often counteract this anorexia.
Purpose of the Study:
- To investigate anorexia as a host defense mechanism against infection.
- To explore how parasites manipulate anorexia for their transmission.
- To analyze the impact of anorexia magnitude on disease dynamics and virulence evolution.
Main Methods:
- Exploration of host-parasite interactions regarding anorexia.
- Development and application of a coevolutionary model.
- Analysis of ecological factors influencing illness-mediated anorexia.
Main Results:
- Anorexia serves dual roles: host defense and parasite manipulation.
- The magnitude of anorexia significantly impacts disease dynamics.
- Shifts in anorexia affect virulence evolution.
Conclusions:
- Anorexia is an ecologically significant factor in host-parasite dynamics.
- Exploiting anorexia offers potential for improved disease management strategies.
- An interdisciplinary approach is recommended to mitigate unintended consequences of anorexia manipulation.
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