Dosing Regime For Housing – Cattle

A comprehensive dosing regime at housing is critical to remove worm and fluke infections, ensuring freedom from disease and maximum productivity of animals throughout the winter housing period. In addition, lice and mite burdens are removed, preventing rapid spread to others during close contact when housed.

Housed Beef Cattle

2015/16 was a high risk year for liver fluke, which led to high pasture contamination this spring/summer in western regions. Consequently, 2017 is likely to present a high liver fluke disease risk in these same areas of the UK. In August 2016, the weather was unsettled and the south experienced a large amount of wet weather. Assuming that wet conditions prevail, this will result in a ‘high risk’ of liver fluke disease in western regions of Scotland, Wales, and northwest England.

Recent surveys and field data revealed that the majority of farmers do not know the best fluke treatment to use against specific stages of the developing parasite1. It is important to avoid unnecessary use of some actives which can ultimately lead to drug resistance. The choice of treatment in cattle this year will be influenced by many factors including risk of infection; meat/milk withdrawal periods; risks posed by other parasites; and the ease of administration.

The economic impact of liver fluke infection can be detrimental to production; even modest parasite burdens can result in significant reductions in expected cattle performance. Liver fluke infection in growing cattle has been shown to depress liveweight gain by up to 1.2kg/week depending on the size of the fluke burden2.

Ectoparasites can also have an extremely negative impact, leading to irritation through their feeding and movements. The itching causes a reduction in appetite, but in addition, biting lice (Bovicola bovis) are responsible for “light spot and fleck” which incurs large costs to the leather industry.

Closamectin Pour-On is a unique combination of ivermectin, broad spectrum macrocyclic lactone, and closantel. It is an early-acting flukicide effective against late immature fluke of seven weeks old Closamectin Pour Onand above. It offers treatment against fluke, gutworms, lungworms and external parasites of cattle in a single, easy to administer pour on application, offering an efficient way of controlling parasites which can have a severe economic effect on cattle during the winter housing period. Additionally, Closamectin Pour- On only has a 28 day meat withhold.

Closantel is effective against fluke which are resistant to triclabendazole, which is important in light of emerging resistance problems. Where triclabendazole resistance is suspected, it is recommended that strategic anthelmintic treatments should rely on the use of alternative active ingredients including closantel.

Closamectin Pour On is applied topically at a dose rate of 1ml/10kg bodyweight and is safe for use in all ages of animal. It is not authorised for use in cattle producing milk for human consumption including during the dry period. This should not be used during the second half of pregnancy in heifers which are intended to produce milk for human consumption.

Wynnstay Animal Health Specialists are available to discuss the treatment options available. For details of your local specialist, please contact your local store.


1 NADIS. 2016. [ONLINE] Available at: http://www.nadis.org.uk/parasite-forecast.aspx. [Accessed 3 October 2016]. 2 The University of Reading, Department of Agricultural and Food Economics, The Economics of Fascioliasis (Liver fluke).

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