FILE - In this Friday, Nov. 9. 2007 file photo, a doctor examines chest X-rays at a tuberculosis clinic in Gugulethu, Cape Town, South Africa. The spread of a virtually untreatable form of tuberculosis in South Africa is being fueled by the release of infected patients into the general community, according to a new study published online Friday, Jan. 17, 2014 in the journal, Lancet. Scientists tracked 107 patients with extensively drug-resistant TB, also known as XDR-TB in three South African provinces between 2008 and 2012. (AP Photo/Karin Schermbrucker, File)