| 
      
        | Virulence Factor | Function |  
        | Capsule | Antiphagocytic,    evasion of immune recognition |  
        | Type 1 fimbriae | Adhesion |  
        | P    fimbriae | Adhesion |  
        | Other    fimbriae (S, F1C) | Adhesion |  
        | Flagella | Motility |  
        | Lipopolysaccharide | Endotoxic |  
        | Outer    membrane proteins (e.g. OmpA, IroN, FhuA, IutA) | Receptors    and membrane transporters |  
        | α-hemolysin | Hemolysis |  
        | Cytolysins    (CNF1, CDT) | Cytotoxicity |  
        | Secreted    autotransporter toxin | Cytotoxicity |  
        | Siderophores    (aerobactin, enterobactin) | Iron    scavenging |  |