Toxoplasmosis as a suspected cause of abortion in a Greenland muskox (Ovibos moshatus wardi).

Toxoplasma gondii tachyzoites were seen in the placenta of a late-term aborted Greenland muskox (Ovibos moschatus wardi) fetus in a captive herd at the San Francisco Zoo. The organism stained with anti-T. gondii polyclonal rabbit serum but not with anti-Neospora caninum serum. The dam had a Toxoplasma titer of > or =1:3,200 at the time of abortion and in each of the previous 3 yr (modified agglutination test). The muskox is a new host record for T. gondii.