The primary toxin associated with invasive Clostridium perfringens infection is A: neuraminidase B: alpha toxin C: hyaluronidase D: coagulase

All<br/>of the following are invasive enzymes except () A: lysozyme B: hyaluronidase C: serum coagulase D: collagenase E: streptokinase

Which point is not applied to diffentiate S. aureus and S. epidermidis? A: Pigment of colony B: Arrangement under microscope C: hemolytic cycle on bloody agar plate. D: Coagulase test.

Pus produced by streptococcus infection is thin and easily diffused. The main reason is that pathogen can produce A: yaluronidase B: asma coagulase C: streptokinase D: streptodornase E: he F: hemolysin