Breeding Performance and Embryonic Development of Bithynia siamensis goniomphalos,the First Intermediate Host of Opisthorchis viverrini
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Abstract
The freshwater snail, Bithynia siamensis giomphalos, is the first intermediate host of liver fluke (Opisthorchis viverrini) in northeast Thailand. Wild broodstock of the snails from three dams, namely Nong Ham Dam (NH), Lampao Dam (LA), and Ubonrat Dam (UB) were collected and identified by sex. The male and female snails (2:3 sex ratio) were mated in a glass box (10x5x5.5 em) in three replicates. The average number of spawned eggs per day was highly significant in NH population (6.48-13.90 eggs) (P<0.05) compared with LA (4.57-9.22 eggs) and UB (2.70-5.63 eggs) populations. The hatching rate of B.s. goniomphalos larva for 30 days was 92.18, 90.94, and 93.07% in LA, NH, and UB populations, respectively. The hatching and survival rates of B. s. goniomphalos larva were similar among the three populations (P>0.05). The embryonic development composed of 5 stages, namely cleavage, morula, trochophora, veliger, and hippo stages. The breeding performance and embryonic development of snails may be essential for the control of 0. viverrini prevalence.
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References
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