谢谢介绍!BCG是由

BCG是由法国细菌学家Calmette和他的助手--兽医Guerin研制的.目前WHO正测试10种结核病新疫苗.这是一篇最新的报道:

http://www.asiasentinel.com/index.php?option=com_content&task=view&id=3900&Itemid=404

Diagnosis of Latent TB Infection:

http://www.cdc.gov/tb/publications/LTBI/diagnosis.htm

对最后一段网络传闻的做法(拿了药不吃而扔掉)不敢苟同.

隐性感染（latent infection)(排除BCG疫苗的阳性结果后)是指感染过TB杆菌而目前无活动期TB症状的.虽然大部分健康人现在不发病,也不传染人,但大约10%的人可能在未来的某个阶段,尤其是免疫功能低下时会发病.一旦发病,在家里在工作单位在学校就是严重的空气传播感染源.

以下这些高风险的 latent TB infection 人CDC是建议治疗的 :

DTBE - Questions and Answers - Latent TB Infection

• people with HIV infection
• people who became infected with TB bacteria in the last 2 years
• babies and young children
• people who inject illegal drugs
• people who are sick with other diseases that weaken the immune system
• elderly people
• people who were not treated correctly for TB in the past

所以,在美华人被要求治疗的大多是:近期被送回中国抚养或探亲过的婴幼儿和近期回过中国(两年内)探亲的成年阳性结果/X光片阴性者.目的是预防免疫功能低下时发展为活动期TB.