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Two-host parasite

Dr. Peter W. Pappas pappas.3 at osu.edu
Tue Oct 26 06:04:07 EST 1999

I have never heard that mice infected with Toxoplasma gondii undergo such
behavioral changes.  Perhaps you are talking about ants infected with
metacercariae of Dicrocoelium dendriticum (an parasitic flatworm of
herbivores, and a "classic" example of how parasites manipulate host

If you want more detailed information on the life cycle of Toxoplasma
gondii, and how this parasite is transmitted between hosts, I suggest that
you try the following URL -


Dr. Peter W. Pappas
Department of EEOB
The Ohio State University
1735 Neil Avenue
Columbus, OH  43210
Phone: 614-292-2746
FAX: 614-292-2030
e-mail: pappas.3 at osu.edu
Russell Farris <tryggvi at email.msn.com> wrote in message
news:#WWjJG2H$GA.337 at cpmsnbbsa05...
> Someone posted on here some time ago that mice with Toxoplasma gondii
> infections would climb to the top of weeds where cats would see them. How
> the T. gondii got back to the mice was not explained. T. gondii is, I
> a protozoan.
> Russ Farris
> <NOSPAMggpurvis at webhart.net> wrote in message
> news:3813f279.277725769 at news.psi.ca...
> >   I had an article from end of June this year, forget the source,
> > about a parasite which completes its cycle using two hosts: in this
> > case a cat and a rat.   The file got corrupted and now I'm having a
> > bit of trouble finding information about this.  Thought someone here
> > would be able to help.
> >   The parasite, I think, begins its cycle on a rat.  Somehow, the rat
> > becomes affected by the parasite and becomes bolder than normal,
> > confrontational where it should really be avoiding confrontation.  As
> > a result, more run-ins with larger animals like cats take place.  The
> > cat, eating the cadaver, ingests the parasite, where it proceeds with
> > another part of its life cycle.  Finally -- I think this is right --
> > rats pick up the parasite once again from the cat's spore.
> >   Anyway, for any and all assistance in tracking this information,
> > thank's in advance.
> >
> > Greg

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