Resumo

Effects of Bayluscide WP 70^® on the Survival and Water-leaving Behaviour of Biomphalaria straminea, Snail Host of Schistosomiasis in Northeast Brazil . Mem. Inst. Oswaldo Cruz [online]. 1997, vol.92, n.5, pp. 619-623. ISSN 0074-0276.  http://dx.doi.org/10.1590/S0074-02761997000500011.

The toxic and behavioural effects of niclosamide (Bayluscide WP 70^®) on Biomphalaria straminea from a highly endemic area of schistosomiasis in northeastern Brazil were investigated through laboratory bioassays. The LD₅₀ and LD₉₀ were 0.114 mg/l and 0.212 mg/l, respectively. Water-leaving behaviour occurred among 14% to 30% of the snails in the presence of sublethal doses of niclosamide and among 16% of the controls. It was concluded that both the relatively low susceptibility to niclosamide and water-leaving behaviour of local B. straminea may be responsible for the recolonization of transmission foci after mollusciciding. It was suggested that recently improved measures of snail control, such as controlled-release formulations of niclosamide and plant molluscicides should be considered in areas where snail control is recommended

Palavras-chave : schistosomiasis; snail control; molluscicide; Bayluscide; Biomphalaria straminea.