Microorganisms and Disease
Which of the following characteristic of the Rotavirus was important for the construction of the Rotashield vaccine?

A limited number of capsule types
The ability of monkey Rotavirus strains to cause serious illness (diarrhea) in human beings
The ability of the Rotavirus to be transmitted faster
The possession of a segmented RNA genome

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Microorganisms and Disease
A major difference between EHEC and EPEC is

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

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Microorganisms and Disease
Plastic implants can pose a serious nosocomial infection problem because

All of these
phagocytes have trouble engulfing bacteria embedded in a biofilm
phagocytes have trouble moving on the plastic surface
infected implants usually have to be surgically removed

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Microorganisms and Disease
Cholera toxin is an A-B type toxin in which the B portions bind to a receptor on a host cell and the A portion enters the cell to cause

cleavage of rRNA that results in disruption of ribosome function
ADP ribosylation of guanylate cyclase that stimulates production of cGMP
ADP ribosylation of a G protein that locks it into an active form that stimulates adenylate cyclase to make cAMP
ADP ribosylation of adenylate cyclase that stops production of cAMP

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Microorganisms and Disease
What is common in catheters and ventilators?

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

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