Sheep Drench Resistance – ‘Combination drenches’ verses ‘rotation of Drenches’
Fighting Sheep Drench Resistance
It has been the reasonably long held opinion of the majority of Sheep Parasitologists:
“that using a combination of drench actives in the one drench on a continuous basis is better than rotating between the drench classes (which is most usually on an annual basis)\”
This has been massively supported by the recent release of a major paper on this topic in the Journal of Parasitology
Leathwick D. M., ‘Managing anthelmintic resistance – Parasite fitness, drug use strategy and the potential for reversion towards susceptibility’, Veterinary Parasitology, 198 (2013) 145-153
This paper shows that in terms of delaying the onset of resistance to the available drench active ingredients it is more advantageous to drench continually with a combination of actives rather than rotating between the actives.
Vetmec LV + Selenium (Abamectin) and Vetmec Dual (Albendazole + Levamisol) used in conjunction is a very cost effective three way combination drench.
Only $0.19c per 50 Kg dose