RT Book, Section A1 Riedel, Stefan A1 Hobden, Jeffery A. A1 Miller, Steve A1 Morse, Stephen A. A1 Mietzner, Timothy A. A1 Detrick, Barbara A1 Mitchell, Thomas G. A1 Sakanari, Judy A. A1 Hotez, Peter A1 Mejia, Rojelio SR Print(0) ID 1163280540 T1 Legionella, Bartonella, and Unusual Bacterial Pathogens T2 Jawetz, Melnick, & Adelberg's Medical Microbiology, 28e YR 2019 FD 2019 PB McGraw-Hill Education PP New York, NY SN 9781260012026 LK accesspharmacy.mhmedical.com/content.aspx?aid=1163280540 RD 2023/03/25 AB A widely publicized outbreak of pneumonia in persons attending an American Legion convention in Philadelphia in 1976 prompted investigations that defined L. pneumophila and the legionellae. Other outbreaks of respiratory illness caused by related organisms since 1947 have been diagnosed retrospectively. Several dozen species of Legionella exist, some with multiple serogroups. L. pneumophila is the major cause of disease in humans; Legionella micdadei and a few other species sometimes cause pneumonia. The other legionellae are rarely isolated from patients or have been isolated only from the environment.