Amebic protozoal infections can be divided into intestinal amebiasis and extraintestinal amebiasis according to the site of infection and clinical manifestations. The typical symptoms of intestinal amebiasis are low fever, diarrhea, mucus and blood stools, jam-like stools, 3-10 times a day, fishy odor, and may be accompanied by abdominal distension or moderate abdominal pain. If these symptoms are prolonged for more than two months, the disease can turn into chronic amebic dysentery, and symptoms such as loss of appetite, peripheral weakness, and anemia can occur. If the amoebic trophozoites pass through the intestine and then spread to distant organs outside the intestine via blood or lymphatic vessels, they form abscesses or ulcers in the corresponding organs, most commonly causing amoebic liver abscess, but also amoebic lung abscess, brain abscess, etc. The main manifestations of amoebic liver abscess are diarrhea, nausea, vomiting, and pain in the liver area are the most typical clinical manifestations, which can also cause weight loss and high fever over time.