Parasitological investigations undertaken on St. Lawrence Island (North East Cape) during part of the summer of 1954 revealed a high incidence of alveolar echinococcosis. Of 198 field mice (Microtus oeconomous and Clethrionomys rutilus) examined, 33 harbored the Echinococcus parasite. Such infections, usually confined to the liver, ranged in appearance from a focus that was barely perceptible to an infection that almost completely filled the abdominal cavity. Two of 12 ground squirrels (Citellus undulatus) were infected with Echinococcus. In one of these animals, a massive infection had destroyed three-fourths of the right lobe of the liver. Of four shrews (Sorex jacksoni) examined, one was heavily infected with Echinococcus. The appearance of the cystic formations in this animal was similar to that observed in field mice.
Cited in: Fortuine, Robert. 1968. The Health of the Eskimos: a bibliography 1857-1967. Dartmouth College Libraries. Citation number 934.
A survey of the helminth parasites of Alaskan rodents has been carried on by the writer since the winter of 1948-49, as a continuation of an investigation begun in the central United States in 1942. Results of this work indicate that, despite the size of the Territory of Alaska, the survey is complete enough to furnish a reasonable knowledge of the species of helminths parasitic in microtine rodents in Alaska. Information derived from previous investigations serves as a standard against which the completeness of the present work may be judged. In the writer'sopinion, the continuation of this work on a survey basis is impractical, and it is the purpose of this paper to report qualitatively the results obtained to date. Main emphasis has been placed here on the taxonomic consideration of the helminthspecies collected. Ecological and zoogeographical observations will be presented in another publication.