| parasite species associated with wild plateau pika (ochotona curzoniae) in southeastern qinghai province, china. | a survey was conducted to determine the prevalence and seasonal abundance of egg, larval, and adult stages of helminths; oocyts of protozoans; and ectoparasites of plateau pikas (ochotona curzoniae) in seven areas of southeastern qinghai province, china, during august 2006 and may 2007. fecal samples collected from 430 plateau pikas were examined by the modified mcmaster technique, which revealed that 83% of the samples contained eggs from two or more helminth species. mean fecal egg counts were ... | 2009 | 19395738 |
| the morphology and histochemistry of eggshell formation in cephaluris coloradensis, a parasite of pikas. | histochemical and histological studies of cephaluris coloradensis (nematoda: oxyuridae) a parasite of pikas (ochotonidae), show that in this species the eggs are each enclosed by three shells. the inner shell is chitin with an operculum at one end; the operculum is chemically distinct. the other two shells are lipoprotein. the inner lipoprotein shell is new, not previously reported in nematode species. it forms after the outer lipoprotein shell but beneath it, and is believed to be a product of ... | 1977 | 864569 |