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Surface ultrastructure of juvenile and adult stages of Centrocestus armatus

Published online by Cambridge University Press:  05 June 2009

Ho-Choon Woo ,
Myung-Deuk Seo  and
Sung-Jong Hong
Ho-Choon Woo
Affiliation:
Department of Veterinary Medicine, College of Agriculture, Cheju National University, Cheju 690-756, Korea
Myung-Deuk Seo
Affiliation:
Department of Parasitology, Gyeongsang National University College of Veterinary Medicine, Chinju 660-701, Republic of Korea
Sung-Jong Hong*
Affiliation:
Department of Parasitology, Chung-Ang University College of Medicine, Dongjak-gu, Seoul 156-756, Republic Korea
*
*Fax +82 2 826 1123 E-mail: hongsj@cau.ac.kr
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Abstract

Centrocestus armatus (Trematoda: Heterophyidae) develops rapidly and produces eggs at 3 days postinfection in albino rats. Excysted metacercariae are pear-shaped and concave ventrally, with 42–44 peg-like circumoral spines. The entire body surface is densely covered with scale-like serrated spines. On juveniles, serration of the tegumental spines is greatest in the middle of the ventral and dorsal surfaces, and decreases anteriorly and posteriorly. Ciliated sensory papillae are concentrated around the oral sucker. Several nonciliated sensory papillae (type II papillae) occur equidistantly on the acetabulum and are arranged in a linear symmetry on the dorsal surface. On adults, the serration of the tegumental spines decreases to 14–17 tips on the ventrolateral surface. The high density of tegumental spines on posterior half of the body and the distribution of type II papillae on dorsal surface are considered to be characteristic of C. armatus.

Type
Research Papers
Information
Journal of Helminthology , Volume 72 , Issue 3 , September 1998 , pp. 215 - 219
Copyright
Copyright © Cambridge University Press 1998

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