1. From chapter 13, figure. Imagine for a minute that the organism in this illustration is E. coli O157:H7. What would be one reason not to treat a patient having this infection with powerful antibiotics?

2. From chapter 12, figure. Assume the growth on the first plate represents normal intestinal microbiota. How could you use these illustrations to explain the development of C. difficile associated colitis?

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Cell wall Endotoxin General physiological effects fever, malaise, aches, shock