Parasite-infected rodents attracted to cat odor study finds
Wednesday, August 17, 2011 - 16:30
in Biology & Nature
New research shows how a brain parasite can manipulate rodent fear responses for the parasite's own benefit. The study, authored by Patrick House and Dr. Robert Sapolsky of Stanford University and released this week in PloS One, addressed how the single-celled parasite Toxoplasma gondii makes infected rodents more likely to spend time near cat odors. The study finds Toxoplasma-infected male rats have altered activation in brain regions involved in fear and increased activation of brain regions involved in sexual attraction after exposure to cat odors. The findings may help explain the biological bases of innate fear and sexual attraction.