Emergence of Opisthorchis viverrini cercariae from naturally infected Bithynia (Digoniostoma) siamensis goniomphalos.
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Date
2005-11-28
Authors
Phongsasakulchoti, Phunthira
Sri-aroon, Pusadee
Kerdpuech, Yupa
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Abstract
Under natural conditions, the emergence of Opisthorchis viverrini cercariae from naturally infected Bithynia (Digoniostoma) siamensis goniomphalos showed diurnal periodicity, peaking between 8:00-10:00 AM. The cercariae did not emerge during darkness, but low-intensity light could induce a release. Cercariae shedded from each field infected B.(D.) s. goniomphalos was recorded daily. The maximum output from one snail was 1,728 cercariae in a day. The total cercarial output from all five infected snails was 56,555 and the maximum of total cercariae shed from one snail was 27,692. The field-infected B. (D.) s. goniomphalos could survive for 70 days after the snails were collected.
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The Southeast Asian Journal of Tropical Medicine and Public Health.
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Phongsasakulchoti P, Sri-aroon P, Kerdpuech Y. Emergence of Opisthorchis viverrini cercariae from naturally infected Bithynia (Digoniostoma) siamensis goniomphalos. The Southeast Asian Journal of Tropical Medicine and Public Health. 2005 ; 36 Suppl 4(): 189-91