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Sheep have been grazing wet areas, ditches, ponds


High summer rainfall is required for the fluke life cycle to take place and for the mud snails, which act as intermediate hosts, to rapidly increase, leading to a build-up of infective fluke stages as the summer progresses.  Mud snails prefers wet mud to free water, and permanent habitats include the banks of ditches or streams, marshy areas and the edges of small ponds. Following heavy rainfall or flooding, temporary habitats may be provided by hoof marks, wheel ruts or rain ponds. Fields with clumps of rushes are often suspect sites.

Parasite Forecasts & Alerts

Month Forecast Alerts
January Parasite Forecast  Chronic Fluke
February  Parasite Forecast   
March  Parasite Forecast   
April Parasite Forecast  Nematodirus & Blowfly
May  Parasite Forecast  Nematodirus & Blowfly
June Parasite Forecast  Blowfly
July Parasite Forecast  Acute Fluke (provisional) & Blowfly
August Parasite Forecast  Acute Fluke & Blowfly
September Parasite Forecast  Acute Fluke & Blowfly
October  Parasite Forecast  Chronic Fluke
November Parasite Forecast  Chronic Fluke
December  Parasite Forecast  Chronic Fluke


Regional Contacts


Rebecca Vallis BVetMed MRCVS
Veterinary Advisor – South West and South England

Veterinary Advisor – Scotland

Sharon Wainwright BVetMed BSc MRCVS
Veterinary Advisor – South Wales & Midlands

Phoebe McCarter BVSC MRCVS
Veterinary Advisor – North England