Accession Number : AD0774720

Title :   The Biological Control of Schistosomiasis: A Program to Develop Use of Trematode Interactions in the Snail Host in Conjunction with the Molluscicide Endod as a New Approach to the Control of Human Schistosomiasis in Egypt and Ethiopia.

Descriptive Note : Final rept. Aug 72-Oct 73,


Personal Author(s) : Heyneman,Donald ; Lee,Harry G.

Report Date : 31 DEC 1973

Pagination or Media Count : 33

Abstract : A series of 25 field stations were established from which 4000 snails were collected. These snail hosts serve as hosts of both of the endemic schistosome species (Schistosoma haematobium from Bulinus truncatus, Bu. abyssinicus, Bu. sericinus, and Bu. forskalii; and S. mansoni from Biomphalaria pfeifferi) and a number of possible trematode antagonists among the echinostome species found parasitizing these snails. About 75 collections of cercariae were made and analyzed. A species of 43-spined Echinoparyphium proved to be a widespread parasite in the various forms of Bulinus collected both in Ethiopia and Egypt. Efforts to develop this species as a biological control of S. haematobium are underway. Factors required for successful biological control are described and discussed.

Descriptors :   *Schistosomiasis, *Trematodes, *Gastropoda, Schistosoma, Parasitic diseases, Parasites, Molluscacides, Egypt, Ethiopia

Subject Categories : Biology

Distribution Statement : APPROVED FOR PUBLIC RELEASE