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Genotypes and subtypes of Cryptosporidium spp. in neonatal calves in Northern Ireland

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Thompson, Heather P., Dooley, James, Kenny, John, McCoy, Maurice, Lowery, Colm, Moore, John E. and Xiao, Lihua (2007) Genotypes and subtypes of Cryptosporidium spp. in neonatal calves in Northern Ireland. PARASITOLOGY RESEARCH, 100 (3). pp. 619-624. [Journal article]

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DOI: 10.1007/s00436-006-0305-x

Abstract

Cryptosporidium spp. in diarrheic calves less than 30 days old from farms across Northern Ireland were examined over a year period by microscopic, genotyping, and subtyping techniques to characterize the transmission dynamics. Cryptosporidium oocysts were detected in 291 of 779 (37.4%) animals. The prevalence rates of rotavirus, coronavirus, and Escherichia coli K99+ were lower as seen in 242 of 806 (30.0%), 46/806 (5.7%), and 16/421 (3.8%) of animals, respectively. Of the 224 Cryptosporidium-positive specimens available for molecular analysis, Cryptosporidium parvum was identified in 213 (95.1%) specimens, Cryptosporidium bovis in eight (3.6%), and Cryptosporidium deer-like genotype in three (1.3%). Sequence analysis of the 60-kDa glycoprotein gene identified 16 IIa subtypes and a new subtype family, with 120 of the 216 (55.6%) positive specimens having the subtype IIaA18G3R1. Eight of the IIa subtypes were previously seen in humans in Northern Ireland. Several subtypes were temporally or geographically unique. The genetic diversity in calves in Northern Ireland was much greater than that reported from other areas. This work demonstrates the utility of genotyping and subtyping tools in characterizing the transmission of Cryptosporidium spp. in calves and humans.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > School of Biomedical Sciences
Research Institutes and Groups:Biomedical Sciences Research Institute
Biomedical Sciences Research Institute > Northern Ireland Centre for Food and Health (NICHE)
ID Code:3824
Deposited By:Professor James Dooley
Deposited On:06 Jan 2010 11:34
Last Modified:17 May 2012 12:09

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