In:
The Korean Journal of Parasitology, Korean Society for Parasitology, Vol. 57, No. 6 ( 2019-12-31), p. 657-664
Abstract:
We identified the echinostome metacercariae in Chinese mystery snails, 〈 i 〉 Cipangopaludina 〈 /i 〉 〈 i 〉 chinensis 〈 /i 〉 〈 i 〉 malleata 〈 /i 〉 , from Xiengkhuang Province, Lao PDR with morphologies of adult worms recovered. Total 20 snails were examined with artificial digestion method and then the collected metacercariae were orally infected to a mouse and a rat. Adult worms recovered from experimental animals were observed with a light microscope and a SEM. The metacercariae were round, 125×123 µm in average size, with a moderately thick cyst wall, collar spines distributed in the head collar and excretory granules in 2 canals of excretory tube. Adult flukes (3-week-old in a rat) were elongated, ventrally curved and 5.310×1.023 mm in average size. Head collar distinct, bearing 43 collar spines with 5 end group ones on each side. Oral sucker subterminal, prepharynx very short, pharynx well developed, and esophagus relatively short. Cirrus sac well developed, with a saccular seminal vesicle, and ventral sucker very large. Ovary round and on the median line of the body. Testes tandom and elongated. Eggs operculated, elliptical and 90×57 µm in average size. In the SEM observation, the head crown prominent, with 43 collar spines resembled with horns of younger stag. Scale-like tegumental spines were densely distributed on the surface between the head collar and ventral sucker, and their densities were decreased posteriorly. Conclusively, the metacercariae detected in 〈 i 〉 C 〈 /i 〉 . 〈 i 〉 chinensis 〈 /i 〉 〈 i 〉 malleata 〈 /i 〉 from Lao PDR were identified as those of 〈 i 〉 Echinostoma 〈 /i 〉 〈 i 〉 macrorchis 〈 /i 〉 based on the morphological characteristics of adult worms.
Type of Medium:
Online Resource
ISSN:
0023-4001
,
1738-0006
DOI:
10.3347/kjp.2019.57.6.657
Language:
English
Publisher:
Korean Society for Parasitology
Publication Date:
2019
detail.hit.zdb_id:
2163174-8
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