The fingernail clam, Pisidium coreanum, has been traditionally consumed raw as a so-called drug therapy by patients with bone fractures in Korea. The present study was designed to determine the possible occurrence and, if present, the prevalence of Echinostoma cinetorchis in P. coreanum collected at a local site, and to determine the susceptibility of the clams in the laboratory to infection with miracidia and cercariae of E. cinetorchis. No cercariae or metacercariae of E. cinetorchis were observed in field-collected P. coreanum clams. In susceptibility experiments with laboratory-reared clams, individuals exposed to miracidia of E. cinetorchis did not release cercariae by 20 days after exposure; necropsy of exposed clams failed to show development of any sporocysts or rediae. To confirm the possibility of these clams serving as an experimental second intermediate host of E. cinetorchis, 20 of them were exposed to E. cinetorchis cercariae from experimentally infected Segmentina hemisphaerula that had been previously exposed to miracidia of E. cinetorchis; all exposed clams became infected. Metacercariae from clams at 14 days postinfection were fed to rats, and adult worms were recovered from the ileocecal regions. This is the first report of P. coreanum serving as second intermediate host of E. cinetorchis.
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October 2006
RESEARCH NOTES|
October 01 2006
Host Specificity of Pisidium coreanum (Bivalvia: Sphaeriidae) to Larval Infection with a Human Intestinal Fluke Echinostoma cinetorchis (Trematoda: Echinostomatidae) in Korea
Y. K. Park;
Y. K. Park
aDepartment of Parasitology and Inha Research Institute for Medical Sciences, Inha University College of Medicine, Incheon 400-712
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C. T. Soh;
C. T. Soh
bDepartment of Parasitology, Wonkwang University College of Medicine, Iksan 570-749
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G. M. Park;
G. M. Park
cDepartment of Parasitology, Kwandong University College of Medicine, Gangneung 210-701, Korea
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M. K. Hwang;
M. K. Hwang
aDepartment of Parasitology and Inha Research Institute for Medical Sciences, Inha University College of Medicine, Incheon 400-712
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P. R. Chung
P. R. Chung
aDepartment of Parasitology and Inha Research Institute for Medical Sciences, Inha University College of Medicine, Incheon 400-712
dTo whom correspondence should be addressed. chungpr@inha.ac.kr
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J Parasitol (2006) 92 (5): 1118–1120.
Citation
Y. K. Park, C. T. Soh, G. M. Park, M. K. Hwang, P. R. Chung; Host Specificity of Pisidium coreanum (Bivalvia: Sphaeriidae) to Larval Infection with a Human Intestinal Fluke Echinostoma cinetorchis (Trematoda: Echinostomatidae) in Korea. J Parasitol 1 October 2006; 92 (5): 1118–1120. doi: https://doi.org/10.1645/GE-787R1.1
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