Microorganisms and Disease
Pseudomembraneous colitis is

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

ANSWER DOWNLOAD EXAMIANS APP

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

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

ANSWER DOWNLOAD EXAMIANS APP

Microorganisms and Disease
The "A" subunit of diphtheria toxin

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
forms cAMP that leads to fluid accumulation

ANSWER DOWNLOAD EXAMIANS APP