婴幼儿慢性腹泻是一种症状,不是一种疾病。它有不同病原,不仅治疗非常困难而且死亡率也很高。在幼儿,病情可惊人的严重,有时称为“婴儿难治性腹泻”。按Avery的定义规定,此症在出生的头3个月内发生,持续2周以上,每日大便超过3次,查不出细菌病原体。不是所有的病例都适合这个标准,发育不好及营养不良是最基本的原因,并被称为“营养性 Chronic diarrhea in infants and young children is a symptom, not a disease. It has a different pathogen and is not only very difficult to treat but also has a high mortality rate. In young children, the condition can be alarmingly severe, sometimes referred to as “infantile refractory diarrhea.” According to the definition of Avery, this disease occurred in the first 3 months of life, lasted more than 2 weeks, more than 3 times a day stool, can not detect bacterial pathogens. Not all cases are suitable for this standard, poor development and malnutrition is the most basic reason, and is called "nutrition