Microorganisms and Disease
Pseudomembraneous colitis is

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

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Microorganisms and Disease
The "A" subunit of diphtheria toxin

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

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