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Surface ultrastructure of Metagonimus miyatai metacercariae and adults.
Korean J Parasitol. 1998 Dec; 36(4):217-25.KJ

Abstract

A scanning electron microscopic study was performed to observe surface ultrastructures of excysted metacercariae and adults of Metagonimus miyatai. Metacercariae were collected from the scale of the pale chub (Zacco platypus), and adult flukes were harvested 1-4 weeks after infection to rats. In excysted metacercariae, the oral sucker was devoid of tegumental spines and had type I and type II sensory papillae. Anteriorly to the ventral sucker, spines were dense and digitated into 5-7 points, whereas near the posterior end of the body spines were sparse and digitated into 2-3 points. In one-week adults, 7 type II sensory papillae were arranged around the lip of the oral sucker, and at inner side of the lip one pair of small and two pairs of large type 1 sensory papillae were seen on each side. The distribution of tegumental spines was similar to that of metacercariae, but they were more differentiated with 9-11 pointed tips. In two- to four-week old adults, the surface ultrastructure was nearly the same as in one-week old adults, however, sperms were frequently seen entering into the Laurer's canal. Conclusively, the surface ultrastructure of M. miyatai was generally similar to that of M. yokogawai, however, differentiation of tegumental spines and distribution of sensory papillae around the oral sucker were different between the two species, which may be of taxonomic significance.

Authors+Show Affiliations

Department of Parasitology, Seoul National University College of Medicine, Korea. cjy@plaza.snu.ac.krNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

9868886

Citation

Chai, J Y., et al. "Surface Ultrastructure of Metagonimus Miyatai Metacercariae and Adults." The Korean Journal of Parasitology, vol. 36, no. 4, 1998, pp. 217-25.
Chai JY, Kang YJ, Choi SY, et al. Surface ultrastructure of Metagonimus miyatai metacercariae and adults. Korean J Parasitol. 1998;36(4):217-25.
Chai, J. Y., Kang, Y. J., Choi, S. Y., Guk, S. M., Yu, J. R., & Lee, S. H. (1998). Surface ultrastructure of Metagonimus miyatai metacercariae and adults. The Korean Journal of Parasitology, 36(4), 217-25.
Chai JY, et al. Surface Ultrastructure of Metagonimus Miyatai Metacercariae and Adults. Korean J Parasitol. 1998;36(4):217-25. PubMed PMID: 9868886.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Surface ultrastructure of Metagonimus miyatai metacercariae and adults. AU - Chai,J Y, AU - Kang,Y J, AU - Choi,S Y, AU - Guk,S M, AU - Yu,J R, AU - Lee,S H, PY - 1998/12/30/pubmed PY - 1998/12/30/medline PY - 1998/12/30/entrez SP - 217 EP - 25 JF - The Korean journal of parasitology JO - Korean J. Parasitol. VL - 36 IS - 4 N2 - A scanning electron microscopic study was performed to observe surface ultrastructures of excysted metacercariae and adults of Metagonimus miyatai. Metacercariae were collected from the scale of the pale chub (Zacco platypus), and adult flukes were harvested 1-4 weeks after infection to rats. In excysted metacercariae, the oral sucker was devoid of tegumental spines and had type I and type II sensory papillae. Anteriorly to the ventral sucker, spines were dense and digitated into 5-7 points, whereas near the posterior end of the body spines were sparse and digitated into 2-3 points. In one-week adults, 7 type II sensory papillae were arranged around the lip of the oral sucker, and at inner side of the lip one pair of small and two pairs of large type 1 sensory papillae were seen on each side. The distribution of tegumental spines was similar to that of metacercariae, but they were more differentiated with 9-11 pointed tips. In two- to four-week old adults, the surface ultrastructure was nearly the same as in one-week old adults, however, sperms were frequently seen entering into the Laurer's canal. Conclusively, the surface ultrastructure of M. miyatai was generally similar to that of M. yokogawai, however, differentiation of tegumental spines and distribution of sensory papillae around the oral sucker were different between the two species, which may be of taxonomic significance. SN - 0023-4001 UR - https://www.unboundmedicine.com/medline/citation/9868886/Surface_ultrastructure_of_Metagonimus_miyatai_metacercariae_and_adults_ L2 - http://www.parasitol.or.kr/kjp/DOIx.php?id=10.3347/kjp.1998.36.4.217 DB - PRIME DP - Unbound Medicine ER -