294. TB symptoms / RFs for TB to progress April 9th, 2008 by reuben in TB Back Top Tags: card 293. What is the rate of development of clinically active TB in healthy PPD converters and HIV patients? / TB RFs 295. TB pulmonary complications / Most important study if considering active TB / PPD false-negative rate in patients with active TB Leave a Reply Cancel reply Please post any discussion to the emupdates Reddit page.