Journal Brief Effect of Drainage of Snail Habitats on the Population of Lymnaea Natalensis

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Cheruiyot, H.K
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One 9f the most important features in the epidemiology of fascioliasis is the presence of a Snail vector in the endemic areas. The snail vector for Fasciola gigantica in East Africa is Lymnaea natalensis whose favourite habitat is described as permanent fresh water (Van Someren1946; McCullough, 1965; Hammond, 1965).Although L. natalensis may survive drought Under laboratory condition for many months (Bitakaramire, 1968), they do not aestivate, and Hence succumb within a short time under field conditions (Hammond 1965). The conventional control methods for fascioliasis in general includes measures to dry out by drainage the marshy areas where these snails thrive. Since L.natalensis occurs in permanent water, drainage would destroy them more effectively than it does the mud snails, the vectors for F. hepatica. During routine surveys for fascioliasis in Kenya, farmers are known to be completely unaware of simple methods, such as drainage, in their effort to control fascioliasis. This study was designed to determine effect of drainage on the population ofLymnaea natalensis and on the size of marshes in farms where fascioliasis is endemic and particularly where the snail habitat is drainable
East African Agricultural And Forestry Journal, 52 (No 1), p. 57-57