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  • Title: Community acceptability of the use of low-dose niclosamide (Bayluscide), as a molluscicide in the control of human schistosomiasis in Sahelian Cameroon.
    Author: Takougang I, Meli J, Wabo Poné J, Angwafo F.
    Journal: Ann Trop Med Parasitol; 2007 Sep; 101(6):479-86. PubMed ID: 17716430.
    Abstract:
    Although field trials of the application of molluscicides for the control of human schistosomiasis have been conducted in several settings, the acceptability of molluscide use at the community level has been poorly documented. The death and putrefaction of aquatic organisms in water treated with niclosamide (Bayluscide), for example, and the yellowish colouration of such water, may decrease the molluscide's acceptability. It may be possible, however, to use doses of a molluscicide that are only just high enough to kill the target snails but not high enough to kill non-target fish and frogs, thereby reducing the application's impact on water quality and colour and improving its acceptability to local communities. In a study in northern Cameroon, Bayluscide WP70 was applied to ponds at concentrations of 0, 0.25, 0.5 or 1 g/m(3). Changes in human contact with the water in the ponds were explored both by direct observation and by in-depth interviews with key informants from the local community. Although all applications of niclosamide greatly decreased human use of the treated ponds for a few days, most informants (99%) were in favour of niclosamide application and only 6% of the interviewees gave change in water colour or bad smell as a reason for not using a particular water body. Over the few days post-application, use of ponds treated with 0.25 or 0.5 g Bayluscide WP70/m(3) was higher than that of the ponds treated with 1 g/m(3), indicating that relatively low-dose applications, if effective in controlling snails, may be more acceptable to local communities than applications at higher doses.
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