A 35 year old male presents with a lesion on his right hand which began as a pruritic papule then enlarged to form a 1-cm vesicle and then became an ulcer surrounded by an edematous halo. He works at a factory that processes animal hides. Staining of the ulcer exudate shows a spore forming, rod-shaped bacteria. Which of the following virulence factors mediates tissue injury in this case?
- A. Endotoxin
- B. Exotoxin
- C. Ig A protease
- D. Bacterial capsule
- E. Type III secretion system
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