| schistosome infection rates in field snails: schistosoma mansoni in biomphalaria pfeifferi from kenya. | six collections of biomphalaria pfeifferi were made in the nairobi and machakos areas of kenya. individual cercarial shedding (method a) showed that 6.9% (65/938) of the snails had mature 'patent' schistosoma mansoni infections (range 3.1--34% in the six collections). crushing (method b) about one-third of the remaining snails detected no additional mature infections but yielded 1.4% (four snails from one collection) with secondary sporocysts from immature 'prepatent' infections. weekly shedding ... | 1979 | 496488 |
| observations on the effects of different chemotherapy strategies on the transmission of schistosoma mansoni in machakos district, kenya, measured by long-term snail sampling and cercariometry. | transmission of schistosoma mansoni was monitored by routine snail sampling for biomphalaria pfeifferi and by supplementary cercariometric measurements in 4 neighbouring study areas in machakos district, kenya. after 1 year, extensive, population-based chemotherapy with a single dose of praziquantel was given in 3 areas, but only minimal treatment in the fourth. in the year preceding treatment, seasonal transmission of s. mansoni and other non-human trematodes occurred in all 4 areas, despite so ... | 1994 | 7800412 |
| preliminary evaluation of some wild and cultivated plants for snail control in machakos district, kenya. | fifty local medicinal, agricultural and wild growing deciduous plants, representing 49 species, 46 genera and 22 families, were screened as water extracts at 1:1000 concentration for molluscicidal activity against biomphalaria pfeifferi in machakos district, kenya. forty-seven of the 50 (94%) plants and 106 of the 134 (79%) plant materials (roots, stems, leaves, fruits, flowers and seeds) were molluscicidal. the leaves of pappea capensis (sapindaceae), steganotaenia araliacea (umbelliferae), zor ... | 1987 | 3656497 |