Molecular and morphological characterization ofEchinococcusin cervids from North America

Parasitology - Tập 132 Số 3 - Trang 439-447 - 2006
R.C.A. Thompson1, Annika Boxell1, Brenda Ralston2, C.C. Constantine3, Richard J. Hobbs1, Todd Shury4, Merle S. Olson5
1World Health Organization Collaborating Centre for the Molecular Epidemiology of Parasitic Infections, School of Veterinary and Biomedical Sciences, Murdoch University, Murdoch, WA 6150, Australia
2Alberta Agriculture, Food and Rural Development, Airdrie, Alberta, Canada
3Division of Genetics and Bioinformatics, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC 3050, Australia
4Dept. of Veterinary Pathology, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, Canada
5Department of Microbiology and Infectious Diseases, University of Calgary, Calgary, Alberta, Canada

Tóm tắt

Many issues concerning the taxonomy ofEchinococcushave been resolved in recent years with the application of molecular tools. However, the status ofEchinococcusmaintained in transmission cycles involving cervid intermediate hosts remains to be determined. The recent characterization of the parasite from cervids in Finland has highlighted the paucity of data available, particularly that from North America. In this study, we have characterized a large number ofEchinococcusisolates from cervids from Western Canada on the basis of morphology and molecular genetic techniques. Our results support earlier studies suggesting thatEchinococcusof cervid origin is phenotypically and genetically distinct toEchinococcusmaintained in domestic host assemblages, and also confirms thatEchinococcusof cervid origin does not constitute a genetically homogeneous group. However, our data do not support the existence of 2 distinct genotypes (strains/subspecies) with separate geographical distributions. Our data appear to support the existence of only 1 species in cervids, but additional isolates from cervids and wolves in other endemic regions should be characterized before a final decision is made on the taxonomic status ofEchinococcusin cervids.

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Parasitology

Tập 132 Số 3

439-447

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