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Applied and Environmental Microbiology, May 2000, p. 2220-2223, Vol. 66, No. 5
0099-2240/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

Cryptosporidium spp. in Domestic Dogs: the "Dog" Genotype

Una M. Morgan,1,* Lihua Xiao,2 Paul Monis,3 Abbie Fall,1 Peter J. Irwin,4 Ronald Fayer,5 Karen M. Denholm,4 Josef Limor,2 Altaf Lal,2 and R. C. Andrew Thompson1

World Health Organisation Collaborating Centre for the Molecular Epidemiology of Parasitic Infections and State Agricultural Biotechnology Centre, Division of Veterinary and Biomedical Sciences,1 and School of Applied Veterinary Medicine,4 Murdoch University, Murdoch, Western Australia, 6150, and Microbiology Unit, Australian Water Quality Centre, Bolivar, South Australia, 5110,3 Australia; Division of Parasitic Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia 303412; and Immunology and Disease Resistance Laboratory, Agricultural Research Service, Department of Agriculture, U.S. Beltsville, Maryland 207055

Received 13 September 1999/Accepted 1 February 2000

Genetic and phylogenetic characterization of Cryptosporidium isolates at two loci (18S rRNA gene and heat shock gene) from both Australian and United States dogs demonstrated that dog-derived Cryptosporidium isolates had a distinct genotype which is conserved across geographic areas. Phylogenetic analysis provided support for the idea that the "dog" genotype is, in fact, a valid species.


* Corresponding author. Mailing address: Division of Veterinary and Biomedical Sciences, Murdoch University, South St., Murdoch, WA 6150, Australia. Phone: (08) 9360 2457. Fax: (08) 9310 4144. E-mail: morgan{at}numbat.murdoch.edu.au.


Applied and Environmental Microbiology, May 2000, p. 2220-2223, Vol. 66, No. 5
0099-2240/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.



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