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Applied and Environmental Microbiology, July 2003, p. 3970-3974, Vol. 69, No. 7
0099-2240/03/$08.00+0     DOI: 10.1128/AEM.69.7.3970-3974.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.

Identification of a Novel Cryptosporidium Genotype in Pigs

U. M. Ryan,* B. Samarasinghe, C. Read, J. R. Buddle, I. D. Robertson, and R. C. A. Thompson

Division of Health Sciences, Murdoch University, Murdoch, Western Australia 6150, Australia

Received 16 December 2002/ Accepted 25 April 2003

Over a 3-year period, a total of 646 fecal samples from pigs in 22 indoor and outdoor herds from Western Australia were screened for Cryptosporidium spp. by microscopy. Results revealed that 39 of 646 samples (6.03%) were positive for Cryptosporidium. Cryptosporidium was much more common in outdoor herds (17.2%) than in indoor herds (0.5%) and was more common in animals between the ages of 5 and 8 weeks (69.2%) than in younger animals (P < 0.0001). Molecular characterization of the positive samples at the 18S ribosomal DNA locus identified two distinct genotypes of Cryptosporidium: the previously identified pig genotype I and a novel pig genotype (pig genotype II), both of which warrant species status.

* Corresponding author. Mailing address: Division of Health Sciences, Murdoch University, Murdoch, WA 6150, Australia. Phone: (61) 8 9360 2482. Fax: (61) 8 9310 4144. E-mail: unaryan{at}central.murdoch.edu.au.

Applied and Environmental Microbiology, July 2003, p. 3970-3974, Vol. 69, No. 7
0099-2240/03/$08.00+0     DOI: 10.1128/AEM.69.7.3970-3974.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.





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