Abstract
The control of the snail vectors of schistosomiasis by aerial application of the molluscicide N-trityl morpholine was carried out in a 80 000 ha area from 1974 to 1977. The effect of this molluscicide regimen on transmission of Schistosoma mansoni was monitored by longitudinal surveys in a number of schools and in pre-school-age children. A cross-sectional school survey was carried out in 1977.There was no significant difference in incidence between the treated area and an adjacent untreated area as measured by the longitudinal school survey, the longitudinal village survey, or the cross-sectional survey. Consideration of egg output and prevalence (as determined by ELISA test) also failed to reveal any difference between the two areas.The initial prevalence and intensity in the subjects selected from the treated area were higher than in the untreated area, and some villages showed possible transmission reduction. In general, however, the results showed a great variation in infection rates and intensity wi...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
