Microorganisms and Disease
Pseudomembraneous colitis is

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

ANSWER DOWNLOAD EXAMIANS APP

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
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

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

ANSWER DOWNLOAD EXAMIANS APP

Microorganisms and Disease
Which of the following is true regarding anthrax?

Inhalation Anthrax requires infection with a large number of spores
Inhalation anthrax and cutaneous anthrax are caused by separate strains of Bacillus anthracis
Anthrax is caused by a virus
Anthrax is highly contagious

ANSWER DOWNLOAD EXAMIANS APP