Microorganisms and Disease
Pseudomembraneous colitis is

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

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Microorganisms and Disease
A major difference between EHEC and EPEC is

EHEC possesses a type III secretion system and EPEC does not
EHEC secretes a Shiga-like toxin and EPEC does not
EPEC passes through the placenta to infect the fetus and EHEC does not
EPEC rearranges host cell actin and EHEC does not

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