嬰幼儿腹泻包括腸炎和消化不良,有的学者在幼儿胃腸道疾病的分类中特別强調消化不良为功能性紊乱并将其与感染性腸炎分开。实际临床上二者很难区別,因在消化不良时不但可以有外源性的病原菌侵入,而且由于腸內动力失常和酸硷度的改变,正常存在于腸下部的細菌也可上行增殖而成致病菌,这类細菌被认为有“潛在致病性”(PotentialPathogenicity)或称条件致病菌。包括某些型大腸杆菌、葡萄球菌、鏈球菌、腸球菌、变形 Diarrhea in infants and young children includes enteritis and indigestion. Some scholars especially emphasize dysfunction of dyspepsia in functional classification of children with gastrointestinal diseases and separate them from infectious enteritis. The actual clinical difference between the two is difficult because of indigestion in not only exogenous pathogens invade, but also due to intestinal motility disorders and changes in pH, the bacteria normally exist in the lower part of the intestinal tract can also be derived from the uplink proliferation Pathogenic bacteria, these bacteria are considered to be “potentially pathogenic” (Potential Pathogenicity) or conditional pathogenic bacteria. Including certain types of Escherichia coli, Staphylococcus, Streptococcus, Enterococcus, deformation