Review Article: The role of equine strongyles in the pathogenesis of colic and current options for prophylaxis

Summary Equine strongyles have been shown to induce alterations in both mesenteric blood flow and also intestinal motility patterns. Both of these pathophysiological events might play a role in the pathogenesis of colic and it is likely that they are interrelated. The prevalence of strongyle‐associated colic is difficult to ascertain: non‐strangulating infarction is uncommon but many other colic episodes may be induced by strongyle infections. In controlled studies and in clinical accounts worm control programmes have resulted in a reduced prevalence of colic. Current options for adequate control of equine strongyles are: interval anthelmintic treatments; strategic anthelmintic treatments; selective anthelmintic treatments; daily in‐feed treatments and pasture hygiene.