The Loom

Ampulex%20stinging.jpgLast year I wrote about the emerald cockroach wasp, Ampulex compressa, which injects venom into cockroaches to turn them into zombie hosts for their parasitic offspring. (More posts on Ampulex here.) The scientists I wrote about have been trying to figure out what exactly the venom does to the nervous system of their victims, and they’ve discovered that it interferes with a neurotransmitter called octopamine. New Scientist has an update. And they also have a link to a YouTube video that offers more than you may want to see of this awesome parasitic manipulation.


  1. #1 Gal Haspel
    December 5, 2007

    Ampulex and Cockroach is such a great story!

    We had some guesses about the neurophysiological mechanism but now Lior Rosenberg did a great job in this paper ( to show not only that Octopamine has this de-zombie-ing effect but also which other neuromodulators do not affect the stung cockroach.

    And mentioning evolution in action and parasitic systems, a paper in Nature reports an adaptive arms-race frozen in mud! (

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