| The most serious internal parasites are large and small strongyles, ascarids, bots, and pinworms. |
| The strongyles are parasites often found in the horse and the donkey of all ages. |
| Observed positive associations of trichurids with strongyles and Strongyloides spp. may result from the high prevalence of trichurids. |
| It is advised to worm in the middle of spring or beginning of autumn when the climatic conditions are favourable for the strongyles growth. |
| Fortunately, large strongyles can be effectively controlled with ivermectin and related dewormers. |
| Further on, I shall again deal with the helminthiasis due to strongyles. |
