Microorganisms and Disease
The nature of the poliovirus gives for oral vaccination (satin vaccine) as part of the eradication programme is

small dosage of wild-type live viruses
heat killed virus
formalin-inactivated viruses
live attenuated strains of all three immunological types

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

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
Anthrax is highly contagious
Inhalation anthrax and cutaneous anthrax are caused by separate strains of Bacillus anthracis
Anthrax is caused by a virus

ANSWER DOWNLOAD EXAMIANS APP

Microorganisms and Disease
The influenza vaccine is administered each year because

it is a polysaccharide vaccine that does not confer long-term protection
the vaccine is sufficiently toxic to make it necessary to administer only a small amount at any one time
None of these
mutations in the viral hemagglutinin may allow the virus to evade the immune response elicited by previous vaccines

ANSWER DOWNLOAD EXAMIANS APP