Microorganisms and Disease
The "A" subunit of diphtheria toxin

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

ANSWER DOWNLOAD EXAMIANS APP

Microorganisms and Disease
A major difference between EHEC and EPEC is

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

ANSWER DOWNLOAD EXAMIANS APP

Microorganisms and Disease
Which of the following is common in the disease caused by Coryne-bacterium diphtheriae and Bacillus anthracis?

Both organisms cause skin and respiratory tract infections
The most serious disease symptoms are the direct result of toxin action
Both organisms are gram-positive spore formers
Diphtheria toxin and edema toxin are ADP ribosylating toxins

ANSWER DOWNLOAD EXAMIANS APP

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

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

ANSWER DOWNLOAD EXAMIANS APP