Horsetalk.co.nz The commonest types of worms that infect equids are the small strongyles (also known as cyathostomins). A group of British equine veterinarians says an anthelmintic resistance disaster is looming unless horse owners radically change their ways. In a letter to the journal Veterinary Record, David Rendle and colleagues from the British Equine Veterinary Association (BEVA) anthelmintic working group reported the findings of a small-scale survey into the use of fecal worm egg counts (FWECs) and anthelmintic sales. The seriousness of the problem is highlighted by the fact that resistance to all currently available classes of anthelmintics has been reported in both the cyathostomins (small redworm) and ascarids (large roundworm). Furthermore, there is currently no prospect of new drugs in the pipeline.