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逐步淘汰大剂量维生素A普遍预防措施以避免毒性。

Phasing out of the Universal Mega Dose of Vitamin-A Prophylaxis to Avoid Toxicity.

作者信息

Bhattacharya Sudip, Singh Amarjeet

机构信息

Department of Community Medicine, School of Public Health, PGIMER, Chandigarh, India.

出版信息

AIMS Public Health. 2017 Jan 20;4(1):38-46. doi: 10.3934/publichealth.2017.1.38. eCollection 2017.

Abstract

Childhood blindness due to corneal ulceration was prevalent among poor Indian children. To tackle this situation, the National Institute of Nutrition (NIN), Hyderabad, India, Vitamin-A (Vit-A) prophylaxis programme was launched nationally in 1970 after field testing. Research of Indian Council for Medical Research (ICMR) documented that prevalence of Vit-A deficiency signs such as Bitot's spot decreased among children, over a period of time. However, this decrease cannot be ascertained is due to mass Vit-A prophylaxis programme. This is because coverage was low and patchy. Improved nutrition status, wider vaccination coverage, increased rate in breast feeding and improvement of healthcare services played a crucial role. Rather many studies revealed that (mass prophylaxis to the child who is having adequate Vit-A level) it may be harmful to certain group of children as a result of acute toxic symptoms. High dose of Vit-A is capable of loss of bone density-hence retarded growth may be observed in susceptible individuals. To tackle this issue food based approach should be promoted (which includes breast feeding) along with timely measles vaccination. The children who have signs of Vit-A deficiency (e.g. night blindness, xeropthalmia, Bitot's spot) or post measles children should receive Vit-A in age specific daily doses for two weeks along with Vit-A rich food, like green leafy vegetables, red palm oil, liver etc. Public spirited citizens, together with scientific community in India, should discourage this "one size fit to all" approach. It will not only avoid the ill effects of high dose of Vit-A but also it will help us optimal utilization of health resources in a resource poor country like India.

摘要

角膜溃疡导致的儿童失明在印度贫困儿童中很普遍。为解决这一情况,印度海得拉巴的国家营养研究所(NIN)在进行现场测试后,于1970年在全国范围内启动了维生素A(Vit-A)预防计划。印度医学研究理事会(ICMR)的研究记录显示,一段时间后,儿童中诸如毕脱斑等维生素A缺乏体征的患病率有所下降。然而,无法确定这种下降是否归因于大规模维生素A预防计划。这是因为覆盖率低且不均衡。营养状况的改善、更广泛的疫苗接种覆盖率、母乳喂养率的提高以及医疗服务的改善起到了关键作用。相当多的研究表明,(对维生素A水平充足的儿童进行大规模预防)可能会对某些儿童群体造成伤害,导致急性中毒症状。高剂量的维生素A会导致骨密度降低,因此在易感个体中可能会观察到生长发育迟缓。为解决这个问题,应推广基于食物的方法(包括母乳喂养)以及及时接种麻疹疫苗。有维生素A缺乏体征(如夜盲、干眼病、毕脱斑)的儿童或患麻疹后的儿童应连续两周按年龄特定的每日剂量服用维生素A,并食用富含维生素A的食物,如绿叶蔬菜、红棕榈油、肝脏等。有公益精神的公民以及印度的科学界应摒弃这种“一刀切”的方法。这不仅能避免高剂量维生素A的不良影响,还将有助于我们在像印度这样资源匮乏的国家优化卫生资源的利用。

相似文献

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Vitamin A deficiency in India.印度的维生素A缺乏症
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Update on vitamin A-related deaths in Assam, India.印度阿萨姆邦维生素A相关死亡情况的最新消息。
Am J Clin Nutr. 2004 Oct;80(4):1082-3; author reply 1083-4. doi: 10.1093/ajcn/80.4.1082.
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Prevention of vitamin A deficiency.维生素A缺乏症的预防。
Am J Clin Nutr. 1969 Jul;22(7):858-62. doi: 10.1093/ajcn/22.7.858.

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