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

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

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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
EPEC rearranges host cell actin and EHEC does not
EHEC possesses a type III secretion system and EPEC does not

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Microorganisms and Disease
The "A" subunit of diphtheria toxin

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

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Microorganisms and Disease
Prontosil is

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

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