RT Book, Section A1 Levinson, Warren A1 Chin-Hong, Peter A1 Joyce, Elizabeth A. A1 Nussbaum, Jesse A1 Schwartz, Brian SR Print(0) ID 1190859033 T1 Structure of Bacterial Cells T2 Review of Medical Microbiology & Immunology: A Guide to Clinical Infectious Diseases, 17e YR 2022 FD 2022 PB McGraw-Hill Education PP New York, NY SN 9781264267088 LK accessmedicine.mhmedical.com/content.aspx?aid=1190859033 RD 2024/04/20 AB Bacteria are classified by shape into three basic groups: cocci (round), bacilli (rods), and spirochetes (spiral shaped) (Figure 2–1). Some bacteria are variable in shape and are said to be pleomorphic (heterogeneous shape). The shape of a bacterium is determined by its rigid cell wall. The microscopic appearance of a bacterium is one of the most important criteria used in its identification.