Hookworm: The adult is about 1cm in length, translucent, fleshy red and grayish white after death. Sarcoptes: an arthropod belonging to the genus Sarcoptera, Sarcoptera, Chigger, Sarcoptera; Adults have four pairs of feet and appendages, and the body is divided into jaw and body, without wings or tentacles. Ascaris lumbricoides: parasitic nematodes with the most internal organs in human beings, which can grow to 15 to 35 cm long. Schistosoma japonicum; Parasitic in the host's blood, living in water, when people come into contact with polluted water, schistosomiasis will pierce their skin. This parasite can cause inflammation (swelling) and damage organs, especially the liver. Tapeworm: Platycladus/Tapeworm/Invertebrate, with about 3,000 species. The body length ranges from about 0.04 inch to 15 meter, and it is parasitic in some invertebrates and various vertebrates. Enterobius vermicularis: Adult females can grow to 8 mm to 13 mm.. The back of pinworm is long and needle-shaped. Others are Toxoplasma gondii, Giardia lamblia, Amoeba dysentery and so on.