![]() Consult your vet to draw up an effective control programme on your farm. In other farm situations there is resistance to some products which make them ineffective. This is due to using a product that only controls adult fluke and the problem is immature fluke. Farmers are confused when ewes die from fluke even though they have been treated. From now until January the greatest threat is from immature fluke and a product should be used that is effective against this form of fluke. There are products on the market that control immature and adult fluke and other products that only treat adult fluke. Signs include loss of condition, anaemia paleness around the eye and swelling (bottle jaw) due to retained fluids. And secondly Chronic Fluke arises due to fluke sucking blood in the liver. One adult fluke can pass 20 000 eggs per day onto the pasture.įirstly Acute Fluke occurs as a result of large numbers of immature fluke burrowing through the liver of the sheep and can lead to sudden death. Twelve weeks after the sheep pick up the fluke larvae from the pasture the life cycle is complete and the adult fluke start to pass eggs onto the pasture. After the fluke larvae are picked up from the pasture they develop into three stages namely early immature fluke (weeks 1 – 5), immature fluke (Week 6 – 11) and mature fluke. ![]() Once the fluke larvae are eaten by the sheep they burrow from the intestine through the liver causing considerable damage and end up in the bile duct of the sheep as adult fluke. In warm wet conditions these hatch out pass through a mud snail to produce larvae which are then picked up off the grass by the sheep. The adult fluke in the sheep produce eggs which are passed onto the pasture. With the warm wet weather we have had since August there is likely to be a high incidence of liver fluke in sheep. High rainfall and warm conditions are optimum environment for mud snails. Liver fluke is caused by a flat like worm that requires a mud snail to develop. ![]() Michael Conroy, Teagasc Drystock Advisor, Roscommon Town Botanic Gardens College of Horticulture. ![]()
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