Enzymes Add To Virulence
| Enzyme | Source | Action | Effect |
| Coagulase | Staphylococci | Forms a fibrin clot | Allows resistance to phagocytosis |
| Streptokinase | Streptococci | Dissolves fibrins clot | Prevents isolation of infection |
| Hyaluronidase | Pneumococci | Digests Streptococci, Staphylococci | Permits tissue hyaluronic penetration acid |
| Leukocidin | Staphylcocci | Disintegrates Streptococci, Certain Rods | Limits phagocytosis Phagocytes |
| Homolysin | Clostridia Staphylococci | Dissolves Red Blood Cells | Induces Anemia and limits oxygen delivery |