9/19/2013 7:14:42 AM
Chronic infection with the parasite Toxoplasma gondii can make mice lose their innate, hard-wired fear of cats. This loss of their innate fear may persist after the parasite is no longer detectable in their brains, suggesting that initial infection may cause permanent changes in the mechanisms underlying their fear of predators. The results are published September 18 in the open access journal PLOS ONE by Wendy Ingram and colleagues from the University of California, Berkeley.
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