| Aerobic | Metabolism |  |  | 
                
                    
                        
                        | Aerobic or facultative anaerobic | Metabolism |  | - | 
                
                    
                        
                        | Anaerobic | Metabolism |  |  | 
                
                    
                        
                        | Bacillus | Morphology |  |  | 
                
                    
                        
                        | Coccobacillus | Morphology |  |  | 
                
                    
                        
                        | Dimorphic | Morphology |  |  | 
                
                    
                        
                        | Diplococcus | Morphology |  |  | 
                
                    
                        
                        | EAEC | Pathogenicity |  |  | 
                
                    
                        
                        | EHEC | Pathogenicity |  |  | 
                
                    
                        
                        | ETEC | Pathogenicity |  |  | 
                
                    
                        
                        | Encapsulated | Membrane |  |  | 
                
                    
                        
                        | Encapsulated | Cell coat |  |  | 
                
                    
                        
                        | Encapsulated cell | Morphology |  |  | 
                
                    
                        
                        | Encapsulated or unencapsulated | Cell coat |  | - | 
                
                    
                        
                        | Enveloped | Virion structure |  |  | 
                
                    
                        
                        | Facultative anaerobic | Metabolism |  |  | 
                
                    
                        
                        | Facultative intracellular aerobic | Metabolism |  |  | 
                
                    
                        
                        | Facultative intracellular parasite | Metabolism |  |  | 
                
                    
                        
                        | Flagellated | Motility |  |  | 
                
                    
                        
                        | Gram-negative | Gram-stain |  |  | 
                
                    
                        
                        | Gram-positive | Gram-stain |  |  | 
                
                    
                        
                        | Helical | Capsid symmetry |  |  | 
                
                    
                        
                        | Helical | Morphology |  |  | 
                
                    
                        
                        | I - dsDNA viruses | Baltimore classification |  |  | 
                
                    
                        
                        | II - ssDNA viruses | Baltimore classification | - | - | 
                
                    
                        
                        | III - dsRNA viruses | Baltimore classification |  |  | 
                
                    
                        
                        | IV - (+)ssRNA viruses | Baltimore classification |  |  | 
                
                    
                        
                        | Icosahedral | Capsid symmetry |  |  | 
                
                    
                        
                        | Lacks peptidoglycan | Cell coat |  |  | 
                
                    
                        
                        | Microaerophilic | Metabolism |  |  | 
                
                    
                        
                        | Microaerophilic to anaerobic | Metabolism |  | - | 
                
                    
                        
                        | Motile | Motility |  |  | 
                
                    
                        
                        | Nonenveloped | Virion structure |  |  | 
                
                    
                        
                        | Nonmotile | Motility |  |  | 
                
                    
                        
                        | Obligate anaerobic | Metabolism |  |  | 
                
                    
                        
                        | Obligate intracellular aerobic | Metabolism |  |  | 
                
                    
                        
                        | Obligate intracellular parasite | Metabolism |  |  | 
                
                    
                        
                        | Periplasmic flagella | Motility |  |  | 
                
                    
                        
                        | Pleomorphic | Morphology |  |  | 
                
                    
                        
                        | Pleomorphic coccobacillus | Morphology |  | - | 
                
                    
                        
                        | Rod-shaped | Morphology |  |  | 
                
                    
                        
                        | STEC | Pathogenicity |  | - | 
                
                    
                        
                        | Short rod | Morphology |  |  | 
                
                    
                        
                        | Spiral or comma shaped | Morphology |  | - | 
                
                    
                        
                        | Spirochete | Morphology |  |  | 
                
                    
                        
                        | Thermally dimorphic | Morphology |  |  | 
                
                    
                        
                        | Twitching or  nonmotile | Motility |  |  | 
                
                    
                        
                        | UPEC | Pathogenicity |  |  | 
                
                    
                        
                        | Unipolar | Motility |  |  | 
                
                    
                        
                        | Unknown | RNA structure |  |  |