| sarcocystis campestris from naturally infected 13-lined ground squirrels, spermophilus tridecemlineatus tridecemlineatus, from nebraska. | grossly visible sarcocysts were seen in the skeletal muscles of 1 of 12 13-lined ground squirrels, spermophilus tridecemlineatus tridecemlineatus, collected in nebraska. the tissue cyst wall was up to 5.0 microm thick and contained spikelike projections. transmission electron microscopy of tissue cysts revealed they were similar to sarcocystis campestris cawthorn, wobeser, and gajadhar, 1983, previously known only from experimental infections in richardson's ground squirrel spermophilus richards ... | 2000 | 11128502 |