31. For example, eosinophils can kill certain parasitic worms known as helminths through ADCC mediated by IgE. 32. Larvae of the parasitic worm live in water. 33. He discovered that these parasitic worms , named bilharzias, were infecting his patients'intestines and damaging their livers. 34. However, Weinstock notes, the condition is rare in poor countries where parasitic worm infection is common. 35. Fleas are more common than parasitic worms . 36. He considered them to be parasitic worms . 37. Lungworm is also a common parasitic worm found in various animal species such as fish and cats. 38. According to the scientists'letter, however, commercial abalone farmers still are releasing the parasitic worms into coastal waters. 39. It is caused by a number of types of infection such as bacteria, viruses, parasitic worms , or protozoa. 40. Parasitic worms block the body's lymphatic system and cause fluids to collect, resulting in a swelling called lymphedema.