摘要：Tuberculosis (TB) remains a worldwide emergency (8 million new cases per year, 2 million
deaths annually) mostly affecting poor countries. To this old, persistent threat, a new emergency
is adding further challenge, i.e., the multidrug-resistant TB, which in its extreme and highly lethal
form is called XDR TB (extensively drug-resistant TB). How to fight XDR TB is a high research
and public health priority.
关键词：Mycobacterium tuberculosis, drug susceptibility testing, first-line drugs, second-line drugs, drug resistance.
