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Life history of Echinoparyphium recurvatum (Trematoda: Echinostomatidae) in Korea.
Korean J Parasitol. 1998 Jun; 36(2):91-8.KJ

Abstract

The present study was performed to observe characteristics of the life history of Echinoparyphium recurvatum under both natural and laboratory conditions in Korea. A batch of Radix auricularia coreana was collected from Sunamchon, one of the stream of West Naktonggang (River), in Kangso-gu, Pusan during August and September 1992. Out of 106 snails examined by crushing, 52 (49.0%) were infected with larval E. recurvatum, i.e. rediae, cercariae and metacercariae. Cercariae naturally shed from snails encysted in the snails of same species and loaches, but not in mud-snails. Adult worms were detected from chicks and ducks experimentally infected with metacercariae, but not from rats and mice. The average recovery rate of adults from chicks was 13.1%. Rediae were sac-like, 2.437 x 0.317 mm in average size, with a muscular pharynx and a brownish cecum which reached the anterior half of the body. Cercariae consisted of a spindle-shaped body (0.262 x 0.129 mm in average) and a rod-like tail (0.528 x 0.056 mm in average). In the cercarial body, 45 collar spines were observed on the head crown, and double rows of excretory ducts with fine granules were laterally arranged between the pharynx and the ventral sucker. Metacercariae were spherical, 0.144 x 0.142 mm in average size, with thick hyaline outer and thin elastic inner walls, and many excretory granules. Adults were slender and more attenuated in the anterior end, 2.760 x 0.550 mm in average size, and had 45 collar spines including four end group spines on both ventral corners. From the above results, it was confirmed that R. auricularia coreana plays a pivotal role in the life cycle of E. recurvatum as the first and/or second intermediate hosts in Korea.

Authors+Show Affiliations

Department of Parasitology, College of Medicine, Gyeongsang National University, Chinju, Korea.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

9637826

Citation

Sohn, W M.. "Life History of Echinoparyphium Recurvatum (Trematoda: Echinostomatidae) in Korea." The Korean Journal of Parasitology, vol. 36, no. 2, 1998, pp. 91-8.
Sohn WM. Life history of Echinoparyphium recurvatum (Trematoda: Echinostomatidae) in Korea. Korean J Parasitol. 1998;36(2):91-8.
Sohn, W. M. (1998). Life history of Echinoparyphium recurvatum (Trematoda: Echinostomatidae) in Korea. The Korean Journal of Parasitology, 36(2), 91-8.
Sohn WM. Life History of Echinoparyphium Recurvatum (Trematoda: Echinostomatidae) in Korea. Korean J Parasitol. 1998;36(2):91-8. PubMed PMID: 9637826.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Life history of Echinoparyphium recurvatum (Trematoda: Echinostomatidae) in Korea. A1 - Sohn,W M, PY - 1998/6/25/pubmed PY - 1998/6/25/medline PY - 1998/6/25/entrez SP - 91 EP - 8 JF - The Korean journal of parasitology JO - Korean J Parasitol VL - 36 IS - 2 N2 - The present study was performed to observe characteristics of the life history of Echinoparyphium recurvatum under both natural and laboratory conditions in Korea. A batch of Radix auricularia coreana was collected from Sunamchon, one of the stream of West Naktonggang (River), in Kangso-gu, Pusan during August and September 1992. Out of 106 snails examined by crushing, 52 (49.0%) were infected with larval E. recurvatum, i.e. rediae, cercariae and metacercariae. Cercariae naturally shed from snails encysted in the snails of same species and loaches, but not in mud-snails. Adult worms were detected from chicks and ducks experimentally infected with metacercariae, but not from rats and mice. The average recovery rate of adults from chicks was 13.1%. Rediae were sac-like, 2.437 x 0.317 mm in average size, with a muscular pharynx and a brownish cecum which reached the anterior half of the body. Cercariae consisted of a spindle-shaped body (0.262 x 0.129 mm in average) and a rod-like tail (0.528 x 0.056 mm in average). In the cercarial body, 45 collar spines were observed on the head crown, and double rows of excretory ducts with fine granules were laterally arranged between the pharynx and the ventral sucker. Metacercariae were spherical, 0.144 x 0.142 mm in average size, with thick hyaline outer and thin elastic inner walls, and many excretory granules. Adults were slender and more attenuated in the anterior end, 2.760 x 0.550 mm in average size, and had 45 collar spines including four end group spines on both ventral corners. From the above results, it was confirmed that R. auricularia coreana plays a pivotal role in the life cycle of E. recurvatum as the first and/or second intermediate hosts in Korea. SN - 0023-4001 UR - https://www.unboundmedicine.com/medline/citation/9637826/Life_history_of_Echinoparyphium_recurvatum__Trematoda:_Echinostomatidae__in_Korea_ L2 - http://www.parasitol.or.kr/kjp/DOIx.php?id=10.3347/kjp.1998.36.2.91 DB - PRIME DP - Unbound Medicine ER -