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Development of Taenia asiatica cysticerci to infective stage and adult stage in Mongolian gerbils

Published online by Cambridge University Press:  12 April 2024

S.L. Chang
Affiliation:
Laboratory of Parasitology, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan
H.K. Ooi
Affiliation:
Department of Veterinary Medicine, National Chung Hsing University, 250 Kuo Kuang Road, Taiwan
N. Nonaka
Affiliation:
Laboratory of Parasitology, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan
M. Kamiya
Affiliation:
OIE Echinococcosis Reference Laboratory and Faculty of Environmental Systems, Rakuno Gakuen University, Ebetsu 069-8501, Japan
Y. Oku*
Affiliation:
Laboratory of Parasitology, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan
*
*Author for correspondence Fax: +81-11-706-5196 E-mail: oku@vetmed.hokudai.ac.jp

Abstract

The development of metacestodes and adult worms of Taenia asiatica in Mongolian gerbils (Meriones unguiculatus) were observed. Cysticerci were recovered from gerbils subcutaneously injected with hatched oncospheres. The recovery rate ranged from 0.1 to 3.2%. No cysticerci were recovered from the orally inoculated gerbils. The infectivity of the cysticerci recovered at 48 weeks post-infection was evaluated. Tapeworms were recovered on day 14 postinfection from the small intestine of 5 of 11 gerbils, with a recovery rate of 27% (6 worms recovered/22 worms inoculated). Three and four adult worms were recovered from two human volunteers who ingested five cysticerci after 4 months post-infection. In worms recovered from gerbils, segmentation and genital primordia in the posterior proglottids and hooklets in the residual rostellum were observed. The results indicate that gerbils can serve as an alternative intermediate host and that partial development of the adult worm stage occurs in gerbils.

Information

Type
Research Article
Copyright
Copyright © Cambridge University Press 2006

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