Genetic Diversity of Cryptosporidium spp. within a Remote Population of Soay Sheep on St. Kilda Islands, Scotland

A study of Soay sheep on the remote St. Kilda Islands, Scotland, reveals a higher diversity of Cryptosporidium species and genotypes than previously expected, including C. hominis, C. parvum, C. xiaoi, and C. ubiquitum. The research analyzed 255 samples collected during two distinct periods: before and after a population crash. Using nested-PCR-RFLP/PCR sequencing and GP60 gene analysis, the study identified multiple Cryptosporidium species coexisting in single infections, with C. parvum detected alongside other species in 27.1% of samples. This finding challenges prior assumptions about parasite diversity in isolated populations and provides insights into cryptosporidiosis dynamics.

Connelly, L., Craig, B. H., Jones, B., & Alexander, C. L. (2013). Genetic Diversity of Cryptosporidium spp. within a Remote Population of Soay Sheep on St. Kilda Islands, Scotland. Applied and Environmental Microbiology, 79(7), 2240–2246. https://doi.org/10.1128/aem.02823-12