RT Book, Section A1 Jameson, J. Larry A1 Fauci, Anthony S. A1 Kasper, Dennis L. A1 Hauser, Stephen L. A1 Longo, Dan L. A1 Loscalzo, Joseph SR Print(0) ID 1167065818 T1 Staphylococcal Infections T2 Harrison's Manual of Medicine, 20e YR 2020 FD 2020 PB McGraw-Hill Education PP New York, NY SN 9781260455342 LK accessmedicine.mhmedical.com/content.aspx?aid=1167065818 RD 2023/03/23 AB Staphylococci are gram-positive cocci that form grapelike clusters on Gram’s stain; they are catalase positive (unlike streptococci), nonmotile, aerobic, and facultatively anaerobic. Staphylococcus aureus, which is distinguished from other staphylococci by its production of coagulase, is the most virulent species.