• Journal of fish pathology
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• v.18 no.3
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• pp.197-204
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• 2005

This study was performed to understand morphological features and classification of different species of cercaria parasitized in Batillaia cummingi, a marine gastropod. Samples were collected from April 2004 to February 2005 in the mud flat of Naecho-do, which is located in the estuary of the Geum river of the Yellow Sea. The mud flat temperature of the study area ranged from 6$^{\circ}C$ to 27$^{\circ}C$ all around the year. Two species of cercaria, Pygidiopsis summus and Cercaria pseudogranifera, were detected through the gonad examination of the gastropod. The minimum and maximum infection rates of Pygidiopsis summus were 0.67% in October and 20.67% in August, respectively. However, P. summus was not detected in December. The infection rate of Cercaria pseudogranifera showed from 9.3% in June to 66.0% in December. These data indicate that Batillaia cummingi should be added as the intermediate host of these parasites.