Accession Number : AD0293189

Title :   STUDY OF ALASKAN SCHISTOSOMES

Corporate Author : ARCTIC AEROMEDICAL LAB FORT WAINWRIGHT ALASKA

Personal Author(s) : HARKEMA,REINARD

Report Date : JUN 1953

Pagination or Media Count : 1

Abstract : The survey of Alaskan schistosomes (blood flukes) of military-medical importance resolved itself into a collection of snails which are the intermediate hosts of the worms and which release infective, penetrating cercariae. A total of seventy-six bodies of water was investigated during the summer of 1952. Sixteen were found to harbor snails infected with the itch-producing cercariae. Infested sites were in the Fairbanks area, Yukon flats, near the Tok and lower Alaska Highways. Ten species of snails were found and the two most common species, Lymnaea palustris L. stagnalis were found to harbor the cercariae. The highest incidence of schistosome cercariae was in late July and August. Natural clinical cases of schistosome dermatitis were found and the itch-producing ability of the located cercariae was demonstrated in all instances. The general syndrome of schistosome dermatitis is discussed. A limited study of the morphology of the cercariae is presented and the behavior of the liberated cercariae is iscussed. Additional morphological, ecological, and life history studies are necessary before positive identification can be made. (Author)

Descriptors :   *GASTROPODA, *SCHISTOSOMA, BIRDS, DISEASE VECTORS, DISEASES, EPIDEMIOLOGY, HUMANS, PATHOLOGY, SKIN(ANATOMY)

Distribution Statement : APPROVED FOR PUBLIC RELEASE