Milek,
J and R.S. Seville. 2003. Species of Eimeria and Isospora (Apicomplexa:
Eimeriidae) from Shrews (Insectivora: Soricidae) from the Greater
Yellowstone
Area
,
Wyoming
,
U.S.A. Comparative Parasitology 70:72-77.
ABSTRACT:
During the summers of 1997 and 1998, shrews (Sorex spp.) from
northwestern
Wyoming
were examined for coccidia by necropsy. Because
specimens collected in 1997 were frozen, coccidian oocysts did not sporulate,
but the morphology of unsporulated oocysts collected from 3 of 19 (16%) masked
shrews (Sorex cinereus) and 7 of 29 montane shrews (Sorex monticolus)
suggests that Eimeria longirostris might be present.
In 1998, sporulated oocysts of E. longirostris were recovered from
7 of 32 (22%) masked shrews and 5 of 14 (36%) montane shrews. In addition, an
unidentified eimerian was recovered from 1 of 32 (3%) masked shrews, and Isospora
brevicauda from 2 of 14 (14%)
montane shrews. The
identification of E. longirostris in masked and montane shrews in
northwestern
Wyoming
constitutes a new geographic record for this parasite. The recovery of
I.
brevicauda from montane shrews in northwestern
Wyoming
establishes new host and geographic records.
