RT Book, Section A1 Levinson, Warren A1 Chin-Hong, Peter A1 Joyce, Elizabeth A. A1 Nussbaum, Jesse A1 Schwartz, Brian SR Print(0) ID 1171925093 T1 Gram-Negative Rods Related to the Respiratory Tract T2 Review of Medical Microbiology & Immunology: A Guide to Clinical Infectious Diseases, 16e YR 2020 FD 2020 PB McGraw Hill PP New York, NY SN 9781260116717 LK accessmedicine.mhmedical.com/content.aspx?aid=1171925093 RD 2024/04/19 AB There are four medically important gram-negative rods typically associated with the respiratory tract, namely, Haemophilus influenzae, Bordetella pertussis, Legionella pneumophila, and Acinetobacter baumannii (Table 19–1). H. influenzae and B. pertussis are found only in humans, whereas L. pneumophila is found primarily in environmental water sources. A. baumannii is found in environmental water sources but also colonizes the skin and upper respiratory tract.