RT Book, Section A1 Rosa, Rossana A1 Munoz-Price, L. Silvia A2 Jameson, J. Larry A2 Fauci, Anthony S. A2 Kasper, Dennis L. A2 Hauser, Stephen L. A2 Longo, Dan L. A2 Loscalzo, Joseph SR Print(0) ID 1159154469 T1 Acinetobacter Infections T2 Harrison's Principles of Internal Medicine, 20e YR 2018 FD 2018 PB McGraw-Hill Education PP New York, NY SN 9781259644016 LK accesspharmacy.mhmedical.com/content.aspx?aid=1159154469 RD 2024/04/20 AB Acinetobacter species were first described in 1911 and named Micrococcus calcoaceticus. Thereafter, the genus was renamed multiple times; since 1950, it has been known as Acinetobacter. Acinetobacter species are gram-negative, oxidase-negative, nonmotile, nonfermenting coccobacilli that are easily recovered on standard culture media. Differentiation among Acinetobacter species on the basis of phenotypic characteristics alone is very difficult. Molecular-based methods such as matrix-assisted laser desorption–ionization–time-of-flight mass spectrometry (MALDI-TOF-MS) and quantitative real-time polymerase chain reaction (PCR) are usually necessary to identify Acinetobacter baumannii, the most clinically relevant species of the genus.