Gastroenteritis caused by persistent low fever, suggesting that the possibility of infection is relatively high, need to actively anti-infection treatment. 1. Bacterial infections, such as dysentery bacillus, Escherichia coli, staphylococcus aureus, etc., can do stool culture, according to the culture results, choose antibiotics sensitive to infected bacteria. For dysentery bacillus infection, quinolone antibiotics such as norfloxacin and ciprofloxacin are usually used; for E. coli infection, third-generation cephalosporins such as cefixime and cefotaxime are used; and for Staphylococcus aureus infection, cefaclor is used; for drug-resistant S. aureus, a more advanced antibiotic such as vancomycin can be used. 2. Viral infections, such as rotavirus, require antiviral treatment, usually using antiviral drugs such as ribavirin. If the symptoms are serious, some symptomatic supportive treatment is also needed, such as rehydration for severe dehydration and PH adjustment for acid-base imbalance. 3. Parasitic infections, such as amoeba, roundworm, etc., need to be deworming treatment, intestinal amoeba infection generally use metronidazole, intestinal roundworm can be used albendazole deworming treatment. During the anti-infective treatment, we should pay attention to the observation of temperature changes, and monitor the vital signs. Because gastroenteritis is prone to water and electrolyte disorders, nausea and vomiting, abdominal pain and distension, diarrhea and other clinical symptoms are more likely to occur after the fluid imbalance and water loss, the serious need to replenish water and electrolytes, so dynamic monitoring of changes in the condition is important. Gastroenteritis symptoms or discomfort, it is recommended to go to the local regular hospitals, under the guidance of the doctor medication, do not delay, so as not to delay the condition.