Anthelmintic resistance in gastrointestinal nematodes of dairy cattle in the Macalister Irrigation District of Victoria
SL Bullen, DS Beggs, PD Mansell, DJ Runciman, J Malmo, MC Playford, MF Pyman
Australian Veterinary Journal | WILEY-BLACKWELL | Published : 2016
OBJECTIVE: To report anthelmintic resistance in gastrointestinal nematode parasites of cattle on commercial dairy farms in the Macalister Irrigation District of Gippsland, Victoria. METHODS: Faecal egg count reduction tests (FECRTs) were used to assess anthelmintic resistance on 20 Macalister Irrigation District dairy farms between May 2013 and June 2014. All three currently available anthelmintic classes for cattle nematodes in Australia were tested. Faecal samples were collected 10-14 days post-treatment for individual faecal egg counts (FEC) and larval differentiation. The arithmetic mean FEC for each treatment group was compared with an untreated control post-treatment. Resistance was de..View full abstract
The authors gratefully acknowledge the support provided by the Maffra Veterinary Centre and those farmers who contributed their time and livestock to the study. Zoetis and Steinfort AgVet donated products. Alison Smith and the staff at Dawbuts Pty Ltd conducted faecal egg counts, larval culture and morphological identification. Valuable on-farm technical assistance was provided by Dean Rowley, Brenton Llewellyn and Bella Ferguson. Additional assistance was provided by Dr Neil Charman and Dr John Larsen. This project was jointly funded by GippsDairy and Rural Finance. The residency program under which this research was conducted is funded by The University of Melbourne, Dairy Australia, The Gardiner Foundation and the Maffra Veterinary Centre.