One plus fecal leukocyte is detected in the stool, which means that there is a bacterial infection in the intestine, also called bacterial enteritis, and is most common in clinical practice. It often appears after eating something unclean and manifests as abdominal pain, diarrhea, watery stools and other symptoms, and in severe cases, fever. In this case, anti-inflammatory treatment is needed first, which can be carried out with levofloxacin, metronidazole, ornidazole and other drugs. If the fever is obvious and the white blood cells are elevated, broad-spectrum antibiotics, such as cephalosporins, can be used for treatment. In addition, symptomatic medications, such as montelukast to stop diarrhea, meclizine to regulate intestinal flora, and rehydration therapy are also needed if the diarrhea is severe.