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Korean J Parasitol > Volume 34(4):1996 > Article

Brief Communication
Korean J Parasitol. 1996 Dec;34(4):273-277. English.
Published online Dec 20, 1996.  http://dx.doi.org/10.3347/kjp.1996.34.4.273
Copyright © 1996 by The Korean Society for Parasitology
Infection status of Tapes philippinarum collected from southern coastal areas of Korea with Parvatrema spp. (Digenea: Gymnophallidae) metacercariae
Woon Mok Sohn,*1Jong Yil Chai,2 and Soon Hyung Lee2
1Department of Parasitology, College of Medicine, Gyeongsang National University, Chinju, 660-280, Korea.
2Department of Parasitology and Institute of Endemic Diseases, Seoul National University College of Medicine, Seoul 110-799, Korea.
Received November 09, 1996; Accepted November 29, 1996.

Abstract

An epidemiologic survey along the several sites of southern coastal areas of Korean peninsula was performed to know the infection status of Parvatrema spp. metacercariae in Tapes philippinarum. The clams were purchased from 13 coastal areas in Kyongsangnam-do and Chollanam-do, in September, 1990. Each of them was digested with pepsin-HCl solution and examined under a stereomicroscope for the recovery of metacercariae. A total of 232 (77.3%) out of 300 examined clams were proved to have 1 to 273 Parvatrema spp. metacercariae (54.7 in average). None of the clams from Samsan-myon Kosong-gun and Dolsan-up, Yochon-gun was infected with metacercariae. However, all of the clams from Yonghyun-myon, Sachon-gun, Dohwa-myon, Kohung-gun, Ahllyang-myon, Changhung-gun and Chiryang-myon, Kangjin-gun was infected with about 71, 31, 80 and 42 metacercariae respectively. Of the clams from Kohyun-myon, Namhae-gun, Doam-myon, Kangjin-gun and Kusan-myon, Uichang-gun examined, 97.5%, 95.0% and 90.0% were infected with about 117, 76 and 28 metacercariae. In other 4 surveyed areas, Seolchon-myon, Namhae-gun, Hwayang-myon, Yochon-gun, Byollyang-myon, Sungju-gun and Bukpyung-myon, Haenam-gun, 55.0%-80.0% of clams were positive, and their average intensity of infection ranged from 6 to 25 metacercariae. From these results, it was confirmed that Tapes philippinarum from southern coastal areas of Korea are highly infected with Parvatrema spp. metacercariae.

Figures


Fig. 1
The map show surveyed areas.


Figs. 2-4
Fig. 2. Three short-necked clams, Tapes philippinarum purchased from a surveyed area in southern coast of Korea. Fig. 3. Metacercariae of Parvatrema sp. inhabited on the surface of the mantle in a clam. Fig. 4. Enlarged view of the living larvae in Fig. 3.

Tables


Table 1
Infection status of Tapes philippinarum by Parvatrema spp. metacercariae in the surveyed areas

References
1. Ching HL. Canad J Zool 1972;50:1299–1302.
 
2. Kim YG, et al. Bull Korean Fish College 1983;16(2):154–158.
3. Lee SH, Chai JY, Hong ST. Gymnophalloides seoi n. sp. (Digenea: Gymnophallidae), the first report of human infection by a gymnophallid. J Parasitol 1993;79(5):677–680.
  
5. Yamaguti S. Jpn J Zool 1939;8:129–210.
7. Yu JR, Chai JY, Lee SH. Parvatrema timondavidi (Digenea; Gymnophallidae) transmitted by a clam, Tapes philippinarum, in Korea. Korean J Parasitol 1993;31(1):7–12.
  
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