Karen E Lesage

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Infectivity, development, and growth of Zygocotyle lunata in 18 male Balb/c mice, each exposed to 20 metacercariae cysts, were examined 1 to 6 wk post-infection (PI). Metacercariae cysts were obtained from naturally infected Helisoma trivolvis snails. At necropsy, 11 of 18 mice were found infected with a total of 32 worms. The range of recovery was 1 to 6(More)
A simplified method for the culture of neonatal Biomphalaria glabrata snails on a diet of the cyanobacteria Nostoc sp. has been developed. Previous studies reported using Nostoc sp. grown on a mud-based medium to feed neonatal snails; this medium is difficult to prepare and gives inconsistent growth between laboratories due to variations in the soil used in(More)
This study used Balb/c mice to examine the longevity of Zygocotyle lunata in a murine host. Of 11 mice, each exposed to 20 Z. lunata cysts, six were infected with a total of 12 worms from 11 to 24 weeks postinfection (PI). Live worms recovered at 24 weeks PI had a mean body area of about 25 mm2. These worms produced viable eggs with well-developed miracidia(More)
This study reports further observations on encystment and excystment of the paramphistomid trematode Zygocotyle lunata. Of numerous substrates tested in the laboratory for cercarial encystment, i.e. plastic and glass dishes, Styrofoam™, aluminium foil, snail shells, and cheesecloth, all but cheesecloth allowed for 100% encystment within 4 h of cercarial(More)
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