The cost of an infusion for acute gastroenteritis depends on the therapeutic drug used by the patient and the number of days of treatment. If it is a drug that routinely inhibits gastric acid secretion, like omeprazole injection or lansoprazole injection, usually 1 infusion per time, each one is about 30-40 yuan, depending on the price bureau of each place. Anti-inflammatory drugs commonly used are cephalosporins, which then probably cost a few dozen dollars, and possibly quinolones, like levofloxacin, which is also about a few dozen dollars for 1 of these types of drugs, possibly 20-30 dollars each. So anti-inflammatory drugs are usually 2 times/day and acid suppressants are also 2 times/day, which may cost about 100 yuan per day according to this cost, and also need to add rehydration drugs such as glucose or saline, but the cost is cheaper. So the cost of an infusion for acute gastroenteritis actually depends on the local fee schedule and the specific medication chosen.