Trichostrongylus (nematodes). These are also small round worms (called round-worms), measuring 4 to 16 mm in length. The Graphidium (stomach worm) is rare in Europe but Trichostrongylus is very common in farm rabbitries. Rabbits become infested by eating green forage contaminated by larvae. The intrinsic pathogenic strength of these parasites is relatively weak, but they do greatly aggravate other rabbit ailments, particularly diarrhoea. Massive infestations can cause extreme inflammation of various parts of the intestinal tract (stomach, small intestine, caecum). The conventional anthelmintics (thiabendazole, phenothiazine, tetramisole) can be used for rabbits. It is recommended that regular treatments be applied every month or two in contaminated farm rabbitries.
Ovan saxat från: The Rabbit - Husbandry, health and production