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Related Experiment Video

Updated: Jan 30, 2026

In vivo Imaging of Transgenic Leishmania Parasites in a Live Host

In vivo Imaging of Transgenic Leishmania Parasites in a Live Host

Published on: July 27, 2010

Parasite manipulation of host behavior.

David P Hughes¹, Frederic Libersat²

¹Department of Entomology, Pennsylvania State University, University Park, PA 16802, USA; Department of Biology, Pennsylvania State University, University Park, PA 16802, USA.

Current Biology : CB

|January 23, 2019

Summary

This summary is machine-generated.

Parasites can control animal behavior to boost gene transmission, a phenomenon known as the extended phenotype. This means observed animal behaviors can be influenced by the genes of the parasites they host.

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Area of Science:

Parasitology
Behavioral Ecology
Evolutionary Biology

Background:

Some parasites manipulate host behavior to increase their own transmission rates.
The concept of the extended phenotype, proposed by Richard Dawkins, suggests that an organism's genes can influence the external environment, including host behavior.

Purpose of the Study:

To explore the concept of the extended phenotype in the context of host-parasite interactions.
To highlight how parasite genes can shape host behavior for transmission advantage.

Main Methods:

Conceptual analysis of existing literature on host-parasite interactions and behavioral manipulation.
Review of case studies illustrating parasite-driven behavioral changes in hosts.

Main Results:

Parasite-induced behavioral changes in hosts can significantly enhance parasite transmission success.
Host behavior can be viewed as an extended phenotype of the parasite, reflecting the influence of parasite genes.

Conclusions:

The extended phenotype provides a framework for understanding how parasites can exert control over host behavior.
Recognizing behavior as an extended phenotype is crucial for comprehending parasite evolution and host-parasite dynamics.