Comparative Studies on the Ecology of Bi0mphalaria Pfeifferi (Krauss, 1847) in Non Endehic and Endehic Areas of Schistosoma Hansoni (Sambon. 1907) in Ethiopia.
No Thumbnail Available
Date
1983-02
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa University
Abstract
The region of Debre Berhan, Where schistosomiasis is
not endemic, Vias compared with a' well established focusof
S.mansoni, vlonji , with regard to climate, snail habitat s
and snail differences in susceptibility and growth rate.
In general rain and changes associated with it have influqnce
on the snail yopulation but this does not account for the
lack of endemic schistosomiasis. Snails from both areas
were equally susceptible to infection with §.mansoni. The
low mean temperature in Debre Berhan increased the incubation
period of the parasite. Mortality rate of Debre Berhan snails
was higher than th~£e of wonji snails while the growth rate
was vice verSI1. Despite the relatively unfavourable conditions, the
possibility of introduction of schistosomiasis to Debre
Berhan as a result of environmental modifications that may
bring changes in human activities can not be discounted.
Description
Keywords
Biology