Is your current sheep drench really working? - Elders Rural Services

Is your current sheep drench really working?

Australian sheep producers spent almost $104 million in the last 12 months on drenches to manage internal parasites.1

Unfortunately, many of these drenches are no longer fully effective in controlling worms and in some cases, are completely ineffective.2 There is widespread single, double and triple resistance to all older active ingredients, including moxidectin and two, three and four-way combinations.2

Any reduction in drench efficacy has a direct impact on the health and productivity of sheep throughout the year. Even a mild or moderate reduction in drench efficacy can reduce potential income by 2 to 10 per cent.3 At a conservative gross margin of $150/ewe (excluding feed costs),4 a 15 per cent reduction in drench efficacy equates to $3/ewe in lost production. A 35 per cent reduction in drench efficacy equates to $15/ewe in lost production.

Drenching is hard work, and it takes just as much effort to administer an ineffective drench as it does a fully effective drench. The most expensive drench is the one that doesn’t work.

Take the Zolvix™ Plus Challenge

Find out if your drench is working by undertaking a free Drench Check worth approximately $230. A Drench Check is a simple way to indicate the efficacy of your existing drench against the worm burden in your sheep at the time of testing.

A Drench Check involves conducting two worm egg count (WEC) tests to determine the reduction in the worm egg count after drenching. The first test is conducted before drenching. The second test is conducted 10 to 14 days after drenching.

The presence of any worm eggs – even very low counts –14 days after drenching may indicate a problem. The larval culture results from the second test will indicate which worm species survived treatment and may be resistant to that drench. Re-treatment with an effective drench may be required.

Conducting a full Drench Test (Worm or Faecal Egg Count Reduction Test (WECRT/FERCT)) every 2 three 3 years is regarded as best practice5 to accurately determine the resistance status and efficacy of each drench class against each worm species on your property.

To claim your free DrenchCheck kit, simply register your details on the Zolvix website before your next planned drench. Your local Elanco representative will then contact you to discuss your current program and provide directions on how to undertake the test.

The Drench Check will require two Elanco Worm Test kits, each containing 10 sample jars, gloves, instructions, order/authorisation form and a pre-paid Express Post bag.

Use the first kit to collect 10 Individual faecal samples before drenching and dispatch to the testing laboratory using the pre-paid Express Post bag. Use the second kit to collect 10 individual faecal samples 10 to 14 days after drenching and dispatch to the testing laboratory using the pre-paid Express Post bag.

Your local Elanco representative will contact you to discuss the results of the Drench Check and provide recommendations on how to maintain or to increase the effectiveness of your drenching program. Then you will know if your current drench is really working or not.

Zolvix Plus is the only combination drench that delivers the power of monepantel. Its unique mode of action provides >99.9 per cent efficacy against a broad spectrum of internal parasites, including single, double and triple resistant strains.6,7 Its new 21-day Export Slaughter Interval is the lowest of any combination drench containing abamectin.

Article written by  Elanco for Seasons magazine.

Always read and follow label directions.

Resistance may develop to any chemical. Ask your local veterinary practitioner or animal health advisor for recommended parasite management practices for your area to reduce development of resistance. It is advisable that a resistance test be conducted before any parasite treatment is used. Use in accordance with the registered label directions and regional drench decision guidelines.

*Visit Zolvix website for terms and conditions.
References: 1. Baron sales data 2021.  2. Playford, M.C. et al. (2014). Prevalence and severity of anthelmintic resistance in ovine gastrointestinal nematodes in Australia (2009-2012). Aust Vet J 92(12):464–471. 3. Besier R.B., et al. (1996). Drench resistance – a large economic cost. J. Agric. West. Aust. 37:60–63. 4. 5.  6.Refer to registered label. 7. Hosking, B.C. et al. (2010). A pooled analysis of the efficacy of monepantel, an amino-acetonitrile derivative against gastrointestinal nematodes of sheep. Parasitol Res 106:529-532.

Zolvix Plus contains 25 g/L monepantel and 2 g/L abamectin. Elanco, Zolvix™ and the diagonal bar logo are trademarks of Elanco or its affiliates. ©2022 Elanco or its affiliates. EAH21721. PM-AU-21-0872

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