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Epidemiological studies on schistosoma haematobium infection in coastal area kenya cercarial density at water contact points and identification of species of cercariae


, : Epidemiological studies on schistosoma haematobium infection in coastal area kenya cercarial density at water contact points and identification of species of cercariae. Tropical Medicine 27(4): 197-202

The cercarial density in natural water was measured at two major water contact points in Mwachinga, Kwale, an endemic area of Schistosoma haematobium infection, by using the filtration technique of Prentice (1984). In addition, the sentinel animals, male golden hamsters, were immersed in water for the identification of species of schistosomes. Only one cercaria was recovered from 40 litters of water sample at one site. Neither adult worm nor egg was recovered from 4 sentinel animals which were immersed there. At the other site, 231 cercariae were detected in 8 liters of water sample. A total of 31 adult worms, 20 males and 11 females, were recovered from 4 sentinel hamsters. The eggs from the livers of hamsters were identified to be S. haematobium based on their morphological features. The practicability of cerceariometry in detecting relative risk of infection in different water contact points was discussed.

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