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Study on the ecological distribution of alveolar Echinococcus in Hulunbeier Pasture of Inner Mongolia, China

Published online by Cambridge University Press:  01 March 2004

C. T. TANG
Affiliation:
Parasitology Research Laboratory, College of Life Sciences, Xiamen University, Xiamen, 361005, China
Y. C. QUIAN
Affiliation:
Hulunbeier Institute of Animal Husbandry and Veterinary Science, Hailar, 021007, China
Y. M. KANG
Affiliation:
Hulunbeier Institute of Animal Husbandry and Veterinary Science, Hailar, 021007, China
G. W. CUI
Affiliation:
Hulunbeier Institute of Animal Husbandry and Veterinary Science, Hailar, 021007, China
H. C. LU
Affiliation:
Hulunbeier Institute of Animal Husbandry and Veterinary Science, Hailar, 021007, China
L. M. SHU
Affiliation:
Parasitology Research Laboratory, College of Life Sciences, Xiamen University, Xiamen, 361005, China
Y. H. WANG
Affiliation:
Parasitology Research Laboratory, College of Life Sciences, Xiamen University, Xiamen, 361005, China
L. TANG
Affiliation:
Parasitology Research Laboratory, College of Life Sciences, Xiamen University, Xiamen, 361005, China present address: Bayer Corporation, 85 TW Alexander Drive, Research Triangle Park, North Carolina 27709. Fax: +919 316 6065. E-mail: liang.tang.b@bayer.com

Abstract

A study on the ecological distribution of alveolar Echinococcus was carried out in the Hulunbeier Pasture of Inner Mongolia, China during 1998 and 1999. Animals examined included wolves (Canis lupus), red foxes (Vulpes vulpes), sand foxes (Vulpes corsac), domestic dogs (Canis familiaris), Microtus brandti, Meriones unguiculatus, Citellus dauricus, Allactaga sibirica, Phodopus sungorus and Ochotona daurica. Three wolves were found to be infected with E. granulosus. Two sand foxes were infected with E. multilocularis. The majority of infections of alveolar echinococcus was found in M. brandti. Based on the structure of metacestodes found in the livers of naturally infected M. brandti, 3 main variants were observed. Type I had small alveolar cysts with thin cyst walls. Type II had a larger cyst with a thick cyst wall. Infection of laboratory mice with the gravid segments isolated from the naturally infected sand foxes led to the formation of mature Type I alveolar metacestodes in the lungs and Type II metacestodes in the livers of infected animals, respectively.

Type
Research Article
Copyright
2004 Cambridge University Press

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