Echinostoma macrorchis metacercariae in cipangopaludina chinensis malleata from Xiengkhuang province, lao PDF and morphologies of adults from experimental animals

Woon Mok Sohn, Byoung Kuk Na, Dongmin Lee, Keeseon S. Eom, Tai Soon Yong, Jong Yil Chai, Duk Young Min

Research output: Contribution to journalArticle

Abstract

We identified the echinostome metacercariae in Chinese mystery snails, Cipangopaludina chinensis malleata, 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 C. chinensis malleata from Lao PDR were identified as those of Echinostoma macrorchis based on the morphological characteristics of adult worms.

Original languageEnglish
Pages (from-to)657-664
Number of pages8
JournalKorean Journal of Parasitology
Volume57
Issue number6
DOIs
Publication statusPublished - 2019 Dec

All Science Journal Classification (ASJC) codes

  • Parasitology
  • Infectious Diseases

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