6/14/2023 0 Comments Liver fluke symptoms![]() The best way for effective control is to target and reduce these multiplying stages. It should be noted that animals do not develop good immunity to liver fluke so ongoing treatment is necessary.Īs you can see, there are two multiplicative stages in the life cycle the first is in sheep and cattle when the eggs are produced, the second is in the snail host. For example, wet versus dry weather, wet or poor draining soil versus dry free draining soil and whether animals are out wintered or housed. It depends on a number of factors, the animals (sheep or cattle), the preceding weather, type of land and farming practices. What is the regime best suited to control the disease? It must be stated that there is no single broad solution. In addition, it has an excellent safety record and no evidence of resistance in fluke has been demonstrated. Rafoxanide is highly effective against adult and immature fluke from 6 to 8 weeks of age with action against fluke as young as four weeks. Rafoxanide is one of the salicylanilides which have activity against the liver fluke (Fasciola hepatica). This active has been in general use since the 1970s and has been shown to be an effective and safe flukicide for general use – a claim which is extensively supported in the literature. Rafoxanide has been widely used for many years throughout the world for the control of liver fluke. It is important for farmers to know what product and more importantly what active they are using and what stages of fluke it controls. However, while individual animals (sheep or cattle) require treatment to control infection, the most important reason for treatment in the long term is the control to reduce pasture infection so as to reduce exposure to the disease in the future. ![]() In dairy cows, the damage is more extensive with reductions in milk yield of up to 8% and impaired fertility, resulting in longer inter-calving intervals or even sterility for the year. The damage to the liver is also an economic cost but as the farmer rarely sees this or may not be aware of the loss, there may be no inducement to do anything about it. The problem is that the animal may still gain weight but less efficiently than should be the case. In beef cattle – the main effect is a reduction in weight gain which can be as high as 20%. ![]()
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