Establishing the Relationship between Farm Re-stocking and Cryptosporidia: The Caldew Catchment Study
This report details an investigation into the relationship between farm re-stocking and cryptosporidia. The study took place following the foot and mouth disease (FMD) related cull within the River Caldew catchment, Cumbria. The effects of restocking on the species and subtypes of Cryptosporidium in farmed livestock, wild animals and surface waters, were compared with isolates from farms that had been continually stocked.
Field studies took place in two phases with the aim of taking samples before and after re-stocking. Whilst differences were observed between the phases, the prevalence of Cryptosporidium oocysts in the catchment was similar. This may be related to the rapid restocking of the catchment following the FMD cull and the relative resistance of Cryptosporidium in the environment during the de-stocked period.
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