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Liver Fluke
Immature liver fluke infection in winter and spring
  1. David Bartram and
  2. Mike Taylor
  1. Pfizer Animal Health International, 23/25 avenue du Docteur Lannelongue, 75668 Paris Cedex 14, France
  2. VParst, Maple House, Dawson Road, Market Weighton, East Yorkshire YO43 3GE
  1. e-mail: david.bartram{at}

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IT is conventional belief that infection with immature liver fluke, Fasciola hepatica, (acute fasciolosis) occurs mainly in the autumn months, reflecting the pattern of abundance of metacercariae on pastures, derived from eggs that were shed during the preceding winter and spring.

However, current UK predictions and forecasts indicate that sheep and cattle grazing pastures in the winter and spring are at continued high risk of infection with immature liver fluke …

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