Microorganisms and Disease
Pseudomembraneous colitis is

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

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Microorganisms and Disease
The "A" subunit of diphtheria toxin

forms cAMP that leads to fluid accumulation
cause ADP ribosylation of a factor involved in protein synthesis
lysis macrophages with the release of cytokines
binds host cell receptors found on heart cells

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

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

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Microorganisms and Disease
Which of the following is true regarding anthrax?

Inhalation anthrax and cutaneous anthrax are caused by separate strains of Bacillus anthracis
Inhalation Anthrax requires infection with a large number of spores
Anthrax is highly contagious
Anthrax is caused by a virus

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