腹泻是指每日排便3次或以上,且粪便性状异常,如稀便、水样便、黏液便、脓血便或血便等。广义感染性腹泻指由病原微生物及其产物或寄生虫所引起的、以腹泻为主要临床特征的一组肠道传染病。依据感染病原体的不同以及机体免疫状态的各异,患者可表现为恶心、呕吐、腹痛、里急后重 Diarrhea refers to three times or more daily defecation, and abnormal fecal traits, such as loose stools, watery stools, mucus, pus or bloody stools and so on. Generalized infectious diarrhea refers to a group of intestinal infectious diseases caused by pathogenic microorganisms and their products or parasites, with diarrhea as the main clinical feature. According to the different pathogens and the immune status of patients vary, patients can be manifested as nausea, vomiting, abdominal pain, tenesmus