先天因素所致的某种或几种物质吸收障碍,称为先天性选择性吸收不良。一、二糖酶缺乏症 1.先天性乳糖酶缺乏症系小肠粘膜刷状缘缺乏二糖酶(乳糖酶、蔗糖酶、蔗糖酶-麦芽糖及海藻糖酶等),婴儿出生后给母乳或牛乳喂养时,即发生严重腹泻,肠内产气过多引起腹胀、肠鸣,钙吸收不良引起骨质疏松,粪质呈酸性,乳糖耐量试验可见低平曲线,呼吸试验发现呼气中含有乳糖酵解而产生的 Congenital factors caused by one or several material absorption disorders, known as congenital selective malabsorption. A, two enzyme deficiencies 1. Lactase deficiency congenital intestinal brush border margin lack of disaccharides (lactase, invertase, sucrase - maltose and trehalase, etc.), the baby born to breast milk or milk Feeding, severe diarrhea, excessive intestinal gas production caused by bloating, bowel, poor calcium absorption caused by osteoporosis, fecal material was acidic, lactose tolerance test showed low flat curve, breath test found that the breath contains lactose Solution generated