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An erratic parasitism found in the lungs of sheep during experimental infection with Fasciola gigantica (Japanese strain)

Published online by Cambridge University Press:  05 June 2009

S. Yoshihara ,
N.H. Hung ,
N.P. Hung  and
N. Goto
S. Yoshihara*
Affiliation:
Animal Production and Grassland Division, Japan International Research Center for Agricultural Sciences, Owashi, Tsukuba City, Ibaraki 305-0851, Japan
N.H. Hung
Affiliation:
Department of Veterinary Medicine, College of Agriculture, Cantho University, 3/2 Street, Campus 2, Cantho City, Vietnam
N.P. Hung
Affiliation:
Department of Veterinary Medicine, College of Agriculture, Cantho University, 3/2 Street, Campus 2, Cantho City, Vietnam
N. Goto
Affiliation:
Department of Safety Research on Biologies, National Institute of Infectious Diseases, Gakuen, Musashimurayama City, Tokyo 208-0011, Japan
*
*Department of Bacteriology and Parasitology, National Institute of Animal Health, Kannondai, Tsukuba City, Ibaraki 305-0856, Japan. Fax: 0298 38 7753 E-mail: yoshis@niah.affrc.go.jp
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Abstract

An erratic parasitism was observed in the lungs of sheep experimentally infected with Fasciola gigantica at autopsy 14 weeks after inoculation. Macro-scopically, several hyperaemia of 7.5–12.5 mm in diameter were found on the surface of the lungs. Juvenile flukes detected in the lungs were much smaller than those in the liver of the same sheep. A slight inflammatory reaction was observed in the lungs and it is likely that the flukes had migrated in the pleural cavity for some time. Occasionally, a mixed thrombus with many eosinophils was found in the blood vessels adjacent to the bronchia, although no cough was observed clinically. This suggests that diagnosis of juvenile fluke is difficult not only by parasitological but also serological methods.

Type
Research Papers
Information
Journal of Helminthology , Volume 72 , Issue 3 , September 1998 , pp. 227 - 230
Copyright
Copyright © Cambridge University Press 1998

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