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Surface ultrastructure of the developmental stages of Heterophyopsis continua (Trematoda: Heterophyidae).
J Parasitol. 1991 Aug; 77(4):613-20.JP

Abstract

Ultrastructural observations were made on the tegument of juvenile and adult stages of Heterophyopsis continua using scanning electron microscopy. On the surface posterior to the ventral sucker, the tegumental processes were bandlike in the metacercariae, cobblestonelike in the flukes 2 days postinfection (PI), and velvety at 3 days PI. The anterior surface between the oral and ventral suckers of the metacercariae was packed densely with tegumental spines having a 10- to 14-pointed tip. In flukes 6 days PI, the number of points increased to 15-17. The tegumental spines immediately behind the ventral sucker on the metacercariae surface possessed 5-7 points; posteriorly the points were reduced in size and in number. Ciliate sensory papillae (type I), as single or clumped forms of 2 or 3, were abundant around the oral and ventral suckers of metacercaria and adult worms. The clumped papillae appeared bilaterally symmetrical on the dorsal and ventral surfaces. The ciliate papillae may function in tango-, rheo-, and/or chemoreception. On the lip of the ventral sucker, 6-7 aciliate domed papillae (type II) were arranged in an equidistant manner. At 2 days PI each type II papilla became a clumped form having 2 or 3 papillae. Type II papillae may function as tango- and/or pressure-receptors. The structure and distribution of papillae suggest that the ventral sucker likely functions as a holdfast organ and the oral sucker as a probing organ involved in feeding.

Authors+Show Affiliations

Department of Parasitology, College of Medicine, Gyeongsang National University, Chinju, Republic of Korea.No affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

1865270

Citation

Hong, S J., et al. "Surface Ultrastructure of the Developmental Stages of Heterophyopsis Continua (Trematoda: Heterophyidae)." The Journal of Parasitology, vol. 77, no. 4, 1991, pp. 613-20.
Hong SJ, Chai JY, Lee SH. Surface ultrastructure of the developmental stages of Heterophyopsis continua (Trematoda: Heterophyidae). J Parasitol. 1991;77(4):613-20.
Hong, S. J., Chai, J. Y., & Lee, S. H. (1991). Surface ultrastructure of the developmental stages of Heterophyopsis continua (Trematoda: Heterophyidae). The Journal of Parasitology, 77(4), 613-20.
Hong SJ, Chai JY, Lee SH. Surface Ultrastructure of the Developmental Stages of Heterophyopsis Continua (Trematoda: Heterophyidae). J Parasitol. 1991;77(4):613-20. PubMed PMID: 1865270.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Surface ultrastructure of the developmental stages of Heterophyopsis continua (Trematoda: Heterophyidae). AU - Hong,S J, AU - Chai,J Y, AU - Lee,S H, PY - 1991/8/1/pubmed PY - 1991/8/1/medline PY - 1991/8/1/entrez SP - 613 EP - 20 JF - The Journal of parasitology JO - J. Parasitol. VL - 77 IS - 4 N2 - Ultrastructural observations were made on the tegument of juvenile and adult stages of Heterophyopsis continua using scanning electron microscopy. On the surface posterior to the ventral sucker, the tegumental processes were bandlike in the metacercariae, cobblestonelike in the flukes 2 days postinfection (PI), and velvety at 3 days PI. The anterior surface between the oral and ventral suckers of the metacercariae was packed densely with tegumental spines having a 10- to 14-pointed tip. In flukes 6 days PI, the number of points increased to 15-17. The tegumental spines immediately behind the ventral sucker on the metacercariae surface possessed 5-7 points; posteriorly the points were reduced in size and in number. Ciliate sensory papillae (type I), as single or clumped forms of 2 or 3, were abundant around the oral and ventral suckers of metacercaria and adult worms. The clumped papillae appeared bilaterally symmetrical on the dorsal and ventral surfaces. The ciliate papillae may function in tango-, rheo-, and/or chemoreception. On the lip of the ventral sucker, 6-7 aciliate domed papillae (type II) were arranged in an equidistant manner. At 2 days PI each type II papilla became a clumped form having 2 or 3 papillae. Type II papillae may function as tango- and/or pressure-receptors. The structure and distribution of papillae suggest that the ventral sucker likely functions as a holdfast organ and the oral sucker as a probing organ involved in feeding. SN - 0022-3395 UR - https://www.unboundmedicine.com/medline/citation/1865270/Surface_ultrastructure_of_the_developmental_stages_of_Heterophyopsis_continua__Trematoda:_Heterophyidae__ DB - PRIME DP - Unbound Medicine ER -
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