Miss He, female, 20 years old, worker, admitted to the hospital on September 28, 1958. Chief complaint: diarrhea for five to six days, with bowel movements ranging from four to five times to more than ten times a day, initially loose stools, later turning into purulent bloody stools, accompanied by tenesmus. No treatment was sought before coming to the hospital, and there was no history of dysentery.

Physical examination: body temperature 40°C, pulse 120 beats per minute, respiration 22 times per minute, acute sexually transmitted disease appearance, no dehydration, heart, lungs, and abdomen normal, large purulent bloody stools, microscopic examination revealed pus cells, red blood cells, and Entamoeba histolytica.

After admission, the patient was given one dose of modified Pulsatilla Decoction:
Chinese pulsatilla root, Skullcap Root, each 9g; ash bark, Coptis Rhizome, Phelloendron Bark, Peony Root, each 6g
Boil 8 cups of water to obtain 3 cups. Take in three doses. The patient's temperature dropped to 38°C the next day, and another dose of Pulsatilla Decoction was given. The temperature returned to normal that evening, and the Entamoeba histolytica disappeared on the third day after taking the medicine. Subsequent examinations showed no recurrence. The patient took the medicine for a total of 6 days, with no side effects, and was discharged cured, with everything normal.