South Africa

Health Care

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Liver Fluke in Cattle - The Economic Impact

The economic impact of liver fluke can be very substantial. Liver fluke infection causes a reduction in growth rates (ADG), reduced milk production, reduced fertility, liver condemnation at the abattoir, mortalities (deaths) and secondary infections.


In high risk fluke areas liver fluke is a significant threat to optimal milk production. The effect of liver fluke on milk is well documented².

  • Milk loss due to liver fluke infection can amount up to 1kg/day.  Over a lactation period of 300 days, it translates to a loss in milk production of up to 300 litres per cow3.  With a producer milk price of R5,15/lt, it translates to a possible loss of R1545 per cow per lactation!
  • A high incidence of liver fluke infestation does not only reduce milk production, but also negatively affect the quality of the milk produced due to a reduction in the milk butterfat concentration1.


Liver fluke can affect weight gains (ADG) in all cattle, but especially in young and growing cattle. A heavy infestation of 200 fluke per calf, can cost up to 28,5% in reduced weight gain 4,5 The graph below shows the reduction in body weight expressed as weight loss on calves - depending on the severity of liver fluke infestation².


A reduced growth rate could affect the general development of the calf and can lead to reduced weaning weights or a delay reaching puberty (breeding age). Both these conditions have a major economic impact. With the current weaner price of >R25/kg, a small reduction in weaning weight will mean a big loss in income.


The loss of income due to liver condemnations caused by liver fluke infestation, can exceed R100 per animal slaughtered!

Implement a STRATEGIC CONTROL STRATEGY year-round, using the most efficient products to REDUCE THE ECONOMIC IMPACT caused by liver fluke.



  1. Department of Agriculture and Rural development, Technical Note, Dairy 13 April 2003
  2. Ross JG (1970) British Veterinary Journal, 126; xiii-xx
  3. The University of Reading, department of Agricultural and food Economics, The Economics of Fascioliasis  (Liver Fluke)
  4. Dargie DJ (1986) in Ed. MJ Howell, Parasitology, Quo Vadit 1986.
  5. Hutton Oddy, Meat and Livestock Australia, 2003 Armidale Feeder Steer School.

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