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Studies on host specificity in Paragonimus westermani: I. Ultrastructural characterization of metacercariae and juvenile and adult worms from abnormal and definitive hosts

Published online by Cambridge University Press:  05 June 2009

Takahiro Fujino ,
Koichi Fukuda ,
Fusanori Hamajima  and
Yoichi Ishii
Takahiro Fujino
Affiliation:
Department of Parasitology, Faculty of Medicine, Kyushu University, Fukuoka 812, Japan
Koichi Fukuda
Affiliation:
Department of Parasitology, National Defense Medical College, Tokorozawa 359, Japan
Fusanori Hamajima
Affiliation:
Department of Parasitology, National Defense Medical College, Tokorozawa 359, Japan
Yoichi Ishii
Affiliation:
Department of Parasitology, Faculty of Medicine, Kyushu University, Fukuoka 812, Japan
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Abstract

Comparative ultrastructural studies have been made of newly excysted metacercariae and worms recovered from abnormal (rats) and normal definitive hosts (dogs). Worms from rats survived for prolonged periods without any growth or development in muscles of the host. They appeared to resemble metacercariae in general features, although ultrastructural observations revealed differences in the composition of tegumental granules and the development of the excretory bladder and caeca. Worms from dogs showed well-developed morphology in association with active energy metabolism and biosynthesis.

Keywords

Paragonimus westermaniultrastructurehost specificityabnormal hostsdefinitive hosts
Type
Research Article
Information
Journal of Helminthology , Volume 63 , Issue 3 , September 1989 , pp. 239 - 249
Copyright
Copyright © Cambridge University Press 1989

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