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NEW QLD RESEARCH - A TALE OF TWO DIFFERENT DRENCH COMBINATIONS

DOES ACATAK DUOSTAR STILL HAVE THE POWER TO CONTROL BOTH CATTLE TICKS AND WORMS?

It is now well accepted that we must use combination drenches (containing more than one active against the same parasite) to fight parasite resistance and increase weight gain.

Cattle tick, a blood-sucking severe parasite, is a significant problem for many producers. They're easily seen on the outside of cattle. Still, recent research has highlighted that barber's pole worm, hidden inside cattle and a blood-sucking parasite, is also a big challenge for QLD producers and leads to massive productivity loss.1-4

Choosing an effective drench against cattle ticks and worms is essential to protect cattle growth.

Unfortunately, many commonly used drenches no longer control key QLD worms, such as Barber’s Pole and Cooperia.1-4

In 2023, an approved trial compared the parasite control and weight gain between Acatak Duostar® and Cydectin Platinum1.

  • 120 steers in Far North Queensland.
  • Mean starting weight of 260 kg.
  • Moderate cattle tick burdens and worm egg count of 230 eggs per gram, dominated by barbers’ pole worm and some Cooperia.
  • Half of the cattle were treated with Cydectin Platinum, and the other half with Acatak Duostar.
  • Tick and worm egg counts were taken 14 days after treatment. Ticks were also sent away for resistance testing.
  • Weight checks 42 and 56 days after treatment.

Results found that Cydectin Platinum resulted in cattle 5 kg heavier than Acatak Duostar treated animals over 56 days.1

 

ostertagia

 

Cydectin Platinum’s better weight gain was due to better worm control. Cydectin Platinum was 100% effective against worm burdens, while Acatak Duostar was only 18% effective. Ivermectin in Acatak Duostar was no longer effective against Barber’s Pole and Cooperia worms.

 

ostertagia

 

While both products had similar cattle tick control on Day 14, it was significant that laboratory testing showed that Fluazuron in Acatak Duostar was no longer fully effective against cattle ticks, with only 70% efficacy on an Adult Immersion Test. Moxidectin in Cydectin Platinum was 100% effective on a Larval Packet Test.

KEY SUMMARY:

  1. It is essential to control both cattle ticks on the outside and worms on the inside.
  2. You can see cattle becoming clear of ticks, but worms inside are left behind, leading to weight loss.
  3. Moxidectin and ivermectin remain effective against cattle tick.
  4. Resistance to ivermectin is common in QLD worms.
  5. Resistance to fluazuron is becoming common in QLD cattle ticks.
  6. The best productivity was seen by using Cydectin Platinum.

EFFICACY IS IMPORTANT, BUT WEIGHT GAIN IS EVERYTHING.

Why did the Cydectin Platinum-treated cattle grow so much better than Acatak Duostar-treated cattle?

It's simple - blood-sucking worms on the inside do count. Research has confirmed that Acatak Duostar and Dectomax Pour-On are no longer effective at controlling QLD key worms, especially barber’s pole, the most damaging worm due to widespread ivermectin and doramectin drench resistance.1-5

Cydectin Platinum leads to significant weight gain due to the dual actives (moxidectin and levamisole) controlling key QLD worms, Barbers Pole and Cooperia, at 99-100%.1-5

MORE INFORMATION:

au.virbac.com/platinum | 1800 242 100

 

REFERENCES:

  1. Canton et al (2019) Impact on beef cattle productivity of infection with anthelmintic-resistant nematodes, NZ Veterinary Journal, 68: 187-192.
  2. NSW DPI (2020) Duck Creek Endoparasite Trial - Virbac Data on File.
  3. Virbac (2016) Weaner Productivity Trials - Data on File
  4. Eccleston & Watt (2016) Post Weaning Growth of beef heifers drenched with long and short-acting anthelmintics, AVJ, 94:341-346.
  5. The Australian Society for Parasitology (2014) Australasian Animal Parasites Inside Out. E-Textbook.
  6. Sutherland and Leathwick (2011) Anthelmintic resistance in nematode parasites of cattle: a global issue? Trends Parasitol. 27(4):176-81.
  7. Rendell et al. (2014), Anthelmintic resistance in cattle nematodes on 36 Victorian properties, Proceedings of the 28th World Buiatrics Congress 231–244.
  8. Cotter et al. (2015), Anthelmintic resistance in nematodes of beef cattle in south-west WA, Veterinary Parasitology 207, 276-284.
  9. Lyndal-Murphy et al. (2010) Reduced efficacy of ML treatments in controlling gastrointestinal nematode infections of weaner dairy calves in subtropical eastern Australia. Vet Parasitology. 168:146-150.
  10. Bullen et al. (2016), Anthelmintic resistance in gastrointestinal nematodes of dairy cattle in the Macalister District of Victoria, AVJ 94, 35-41. 11. George M et al. (2020) Production impacts and resistance of gastrointestinal parasites in feedlot cattle, MLA: B.FLT.3002.
  11. George M et al. (2020) Production impacts and resistance of gastrointestinal parasites in feedlot cattle, MLA: B.FLT.3002.
  12. Pritchard & Geary (2019) Perspectives on the utility of moxidectin for controlling parasitic nematodes in the face of developing anthelmintic resistance, International Journal for Parasitology-, 10:69-83.
  13. Ball and Gibbison (2021), Resistance Patterns to Avermectins and Milbemycins in Australian Cattle Nematodes, ACV Journal Dec 2021.

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