Eucestoda the "broad tapeworm" or "fish tapeworm") and related species. Humans become infected by eating raw, undercooked, or marinated fish acting as a second intermediate or paratenic host harboring metacestodes or plerocercoid larvae. Clinical symptoms are due to the large size of the tapeworm, which often reaches a length exceeding 15 m. The most common symptom is pernicious anemia, caused by the absorption of vitamin B12 by the worm. Other symptoms include various intestinal issues, slight leukocytosis, and eosinophilia. This condition is caused by the plerocercoid larvae of the tapeworm "Spirometra". Humans become infected by drinking contaminated water, eating raw or
Onsan illness Onsan illness Onsan Illness () is the name for a pollution disease in Korea that occurred in Onsan-eup, Ulju-gun, Ulsan, Korea. It caused a variety of symptoms in the general public and gave rise to an environmental movement in the mid-1980s. In the 1970s South Korea’s dictator Park Chung Hee pushed for a heavy-chemical industry drive in an effort to modernise the country’s economy and make it less dependent on foreign imports, while encouraging foreign direct investment. The South Gyeongsang Province was one of the areas identified for industrial development along with the independently administered coastal corridor between Ulsan and