Microorganisms and Disease
Pseudomembraneous colitis is

precipitated by the use of certain antibiotics
caused by a spore-forming bacterium
All of these
caused by a gram-positive bacterium

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Microorganisms and Disease
Which of the following is common in the disease caused by Coryne-bacterium diphtheriae and Bacillus anthracis?

Diphtheria toxin and edema toxin are ADP ribosylating toxins
Both organisms are gram-positive spore formers
Both organisms cause skin and respiratory tract infections
The most serious disease symptoms are the direct result of toxin action

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Microorganisms and Disease
What is common in catheters and ventilators?

They are used primarily in neonatal intensive care units
Bacteria responsible for associated infections are usually susceptible to antibiotics
They predispose patients to viral rather than bacterial infections
They bypass important defenses of the body

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