Cat Parasite Makes Mice Fearless Forever

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Cat Parasite Makes Mice Fearless Forever

<img src="http://media-2.web.britannica.com/eb-media/61/92861-004-40DACDE6.jpg" width="270" height="178" class  align="right" />Infection with the parasite <em>Toxoplasma gondii</em> causes rodents to lose their fear of cat odors. In mice, that fearlessness may become permanent, even after the parasite is cleared from the body, according to new research.

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