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[Surface ultrastructure of Parvatrema timondavidi (Digenea: Gymnophallidae) according to its developmental stages].
Korean J Parasitol. 1994 Jun; 32(2):65-74.KJ

Abstract

Surface ultrastructure of Parvatrema timondavidi developmental stages was studied using a scanning electron microscope. The metacercariae were collected from the marine clam. Tapes philippinarum, and juvenile and adult worms were recovered at 1, 2, 3 and 7 days after experimental infection of mice. The metacercariae had a large oral sucker and characteristic lateral projections. Around the lip of the oral sucker many type I and type II sensory papillae were observed, and type III papillae were located symmetrically on the medial side of the lateral projection. Numerous type I papillae were grouped around the genital pore. The tegumental spines were distributed over the worm surface except the lip of the suckers and genital pore. The 1-day old worm had a well-developed ventral sucker, with 6 type II sensory papillae on its outer surface and another 6 type I papillae on the inner side. Two small type I papillae were seen on the anterior side of the ventral sucker. The genital pore was small and opened separately from the ventral sucker and 15 type I papillae were grouped around it. The 2-, 3-, and 7-day worms revealed that as they grew to be adults, the spine tips became multipointed, the genital pore formed a genital atrium, and the cytoplasmic process became well differentiated. In 2- and 3-day worms 10 type II papillae encircling the lip of the oral sucker, and additional 4 papillae at the dorsal side of 4 dorsal type II papillae were a characteristic feature. The distribution pattern of sensory papillae around the oral sucker and genital pore, and 2 type I papillae on the anterior side of the ventral sucker, was so peculiar in P. timondavidi, that they seem to be useful keys for taxonomic differentiation from other gymnophallids.

Authors+Show Affiliations

Department of Parasitology, College of Medicine, Kon-Kuk University, Chungju, Korea.No affiliation info availableNo affiliation info available

Pub Type(s)

English Abstract
Journal Article

Language

kor

PubMed ID

8025035

Citation

Yu, J R., et al. "[Surface Ultrastructure of Parvatrema Timondavidi (Digenea: Gymnophallidae) According to Its Developmental Stages]." The Korean Journal of Parasitology, vol. 32, no. 2, 1994, pp. 65-74.
Yu JR, Park JY, Chai JY. [Surface ultrastructure of Parvatrema timondavidi (Digenea: Gymnophallidae) according to its developmental stages]. Korean J Parasitol. 1994;32(2):65-74.
Yu, J. R., Park, J. Y., & Chai, J. Y. (1994). [Surface ultrastructure of Parvatrema timondavidi (Digenea: Gymnophallidae) according to its developmental stages]. The Korean Journal of Parasitology, 32(2), 65-74.
Yu JR, Park JY, Chai JY. [Surface Ultrastructure of Parvatrema Timondavidi (Digenea: Gymnophallidae) According to Its Developmental Stages]. Korean J Parasitol. 1994;32(2):65-74. PubMed PMID: 8025035.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - [Surface ultrastructure of Parvatrema timondavidi (Digenea: Gymnophallidae) according to its developmental stages]. AU - Yu,J R, AU - Park,J Y, AU - Chai,J Y, PY - 1994/6/1/pubmed PY - 1994/6/1/medline PY - 1994/6/1/entrez SP - 65 EP - 74 JF - The Korean journal of parasitology JO - Korean J. Parasitol. VL - 32 IS - 2 N2 - Surface ultrastructure of Parvatrema timondavidi developmental stages was studied using a scanning electron microscope. The metacercariae were collected from the marine clam. Tapes philippinarum, and juvenile and adult worms were recovered at 1, 2, 3 and 7 days after experimental infection of mice. The metacercariae had a large oral sucker and characteristic lateral projections. Around the lip of the oral sucker many type I and type II sensory papillae were observed, and type III papillae were located symmetrically on the medial side of the lateral projection. Numerous type I papillae were grouped around the genital pore. The tegumental spines were distributed over the worm surface except the lip of the suckers and genital pore. The 1-day old worm had a well-developed ventral sucker, with 6 type II sensory papillae on its outer surface and another 6 type I papillae on the inner side. Two small type I papillae were seen on the anterior side of the ventral sucker. The genital pore was small and opened separately from the ventral sucker and 15 type I papillae were grouped around it. The 2-, 3-, and 7-day worms revealed that as they grew to be adults, the spine tips became multipointed, the genital pore formed a genital atrium, and the cytoplasmic process became well differentiated. In 2- and 3-day worms 10 type II papillae encircling the lip of the oral sucker, and additional 4 papillae at the dorsal side of 4 dorsal type II papillae were a characteristic feature. The distribution pattern of sensory papillae around the oral sucker and genital pore, and 2 type I papillae on the anterior side of the ventral sucker, was so peculiar in P. timondavidi, that they seem to be useful keys for taxonomic differentiation from other gymnophallids. SN - 1738-0006 UR - https://www.unboundmedicine.com/medline/citation/8025035/[Surface_ultrastructure_of_Parvatrema_timondavidi__Digenea:_Gymnophallidae__according_to_its_developmental_stages]_ L2 - http://www.parasitol.or.kr/kjp/DOIx.php?id=10.3347/kjp.1994.32.2.65 DB - PRIME DP - Unbound Medicine ER -
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