佝偻病是常见于婴幼儿的一种慢性营养缺乏病。它是由于维生素丁的缺乏而引起钙、磷的代谢失调,钙盐不能正常的储存于骨骼内,故使骨骼发生病变。除骨骼的变化之外,尚有呼吸、消化、神经和心血管系统的全身性改变,使病儿的机体反应性降低,对疾病的抵抗能力减弱,罹患传染病时死亡率很高。这样就更加严重的威胁着佝偻病儿的生 Rickets is a chronic nutritional deficiency common in infants and young children. It is due to the lack of vitamin D caused by calcium and phosphorus metabolism disorders, calcium salts can not be stored in the normal bone, so the skeletal lesions. In addition to skeletal changes, there are systemic changes in the respiratory, digestive, neurological and cardiovascular systems that reduce the responsiveness of the sick child to disease, diminish the ability to resist illness, and have a high mortality rate when suffering from an infectious disease. This is even more serious threat to the sick child’s health