Microorganisms and Disease
Pseudomembraneous colitis is

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

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Microorganisms and Disease
The "A" subunit of diphtheria toxin

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
forms cAMP that leads to fluid accumulation

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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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Microorganisms and Disease
Prontosil is

an effective antibacterial both in animals as well as in in-vitro cultures
not used as an antibacterial agent
an effective antibacterial when used in in-vitro cultures
an effective antibacterial when used in animals

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