RT Book, Section A1 Langston, Shannon M. A1 Bales, Brian D. A2 Knoop, Kevin J. A2 Stack, Lawrence B. A2 Storrow, Alan B. A2 Thurman, R. Jason SR Print(0) ID 1181051544 T1 Tuberculosis T2 The Atlas of Emergency Medicine, 5e YR 2021 FD 2021 PB McGraw-Hill PP New York, NY SN 9781260134940 LK accessemergencymedicine.mhmedical.com/content.aspx?aid=1181051544 RD 2024/04/18 AB Tuberculosis (TB) is a chronic bacterial infection spread from human to human through respiratory droplets containing M tuberculosis, an acid-fast bacillus. Upon inhalation, the organisms are transported to regional lymph nodes where the immune system forms granulomas or “tubercles.” Most people undergo complete healing following exposure with only a positive purified protein derivative (PPD) test. However, it may lie dormant as latent disease until the immune system is suppressed, leading to organism release. TB occurs worldwide but is more common in impoverished nations.