The Helminth Parasites of the Pika, Ochotona princeps princeps (Richardson, 1828), in Northern Idaho

Seesee, Floyd M.

doi:10.2307/2424031

Cited by 5 publications

(4 citation statements)

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“…At present, the number of species documented to parasitize plateau pika is greater than 40, including one trematode (Grundmann and Lombardi, 1976), six cestodes, 30 nematodes, and three arthropods (Hansen, 1948;Olsen, 1948;Rausch, 1963;Seesee, 1973). This study brings the addition of Oesophagostomum sp., Haemonchus sp., Trichuris sp., Chbertiinae sp., and Pulex sp.…”

Section: Discussionmentioning

confidence: 78%

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Parasite Species Associated With Wild Plateau Pika (Ochotona Curzoniae) in Southeastern Qinghai Province, China

Wang

et al. 2009

Journal of Wildlife Diseases

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ABSTRACT: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 generally moderate and showed the same trend irrespective of the age or sex of the pikas. The prevalence and counts of cestode eggs showed strong seasonal relationships that corresponded with the rainfall pattern in the study area during the study period. Of the 430 plateau pika examined at necropsy, 89% contained adult nematode or cestode species, but none of these contained adult trematode species or protozoans. Overall, six genera of adult nematodes including Oesophagostomum sp., Cephaluris coloradensis, Eugenuris schumakowiescsi, Haemonchus sp., Trichuris sp., and Chbertiinae sp.; three genera of adult cestodes including Schizorchis sp., Ochotonae sp., and Hymenolepis nana; three ectoparasite species including Hypoderma curzonial, Pulex sp., and Ixodes ovatus; and one proscolex stage of a cestode, Echinococcus multilocularis or Echinococcus shiquicus, were encountered during the study. Other genera examined occurred in low numbers, which did not allow any meaningful comparisons. Overall, results suggest that four parasite species, Hypoderma curzonial, Pulex sp., Ixodes ovatus Neumann, and Cephaluris coloradensis, may be regulating factors in controlling future numbers of plateau pika in this study area. These data provide evidence of a natural biologic control mechanism of plateau pika on grassland habitats, and may be of use for identifying the mechanism of transmission of parasites between plateau pika, livestock, and humans.

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Section: Discussionmentioning

confidence: 78%

“…Ixodes sp., Cephaluris sp., etc. ; Liu et al, 2002) and Ochotona princeps from North America (i.e., Dermatoxys sp., Murielus harpespiculus, Labiostomum sp., Cephaluris coloradensis, and Schizorchis ochotonae (Hansen, 1948;Olsen, 1948;Leiby, 1961;Rausch, 1963;Seesee, 1973;Grundmann and Lombardi, 1976).…”

Section: Discussionmentioning

confidence: 99%

Parasite Species Associated With Wild Plateau Pika (Ochotona Curzoniae) in Southeastern Qinghai Province, China

Wang

et al. 2009

Journal of Wildlife Diseases

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“…Species of Ohbayashinema appear to be relatively rare and local parasites based on absence in extensive survey and inventory of Oc. princeps across widespread localities in western North America (Olsen, 1948;Barrett and Worley, 1970;Seesee, 1973;Grundmann and Lombardi, 1976;Hobbs, 1980;. Further, biodiversity survey in Alaska, Northwest Territories, and the Yukon Territory, now involving in excess of 200 specimens of Oc.…”

Section: Discussionmentioning

confidence: 99%

“…Based on these host associations and geographic records, it was considered that the distribution of Ohbayashinema might be limited to species of Ochotona from the eastern Palearctic. Such a contention was supported by parasitological survey, particularly of the American pika (Ochotona princeps (Richardson, 1828)) across the intermountain regions of western North America where species of Ohbayashinema had not been represented in an otherwise diverse helminth fauna (e.g., Olsen, 1948;Barrett and Worley, 1970;Seesee, 1973;Grundmann and Lombardi, 1976;Hobbs, 1980). Notably, this fauna included Murielus harpespiculus Dikmans, 1939, andGraphidiella ochotonae Olsen, 1948, representing 2 other genera of Trichostrongylina that have Holarctic distributions in pikas (Gvozdev, 1962;Gvozdev et al, 1970;; interestingly, trichostrongyline nematodes are unknown in collared pika (Ochotona collaris (Nelson, 1893)) from Alaska and the Northwest Territories and the Yukon Territory in Canada .…”

mentioning

confidence: 99%