MICROORGANISMS AND DISEASE QUIZ

Mucus helps in protecting against pathogens by

facilitating the growth of normal flora

sequestering Iron

lowering the pH

blocking access and attachment of pathogens to mucosal surfaces

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All infections do not cause fever and all fevers are not due to infections which of the following is an example of non-infections cause of fever?

Malaria

Rheumatic disease

Typhoid

Chicken pox

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Immunization with which of the following toxoid induces high titer serum antibody, but does not protect from the corresponding disease?

Tetanus

Diphtheria

Botulism

Shigellosis

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The agent responsible for causing mad cow disease is thought to be a

prion

virus

fungus

protozoan

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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 a G protein that locks it into an active form that stimulates adenylate cyclase to make cAMP

ADP ribosylation of adenylate cyclase that stops production of cAMP

cleavage of rRNA that results in disruption of ribosome function

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Which of the following disease is caused by DNA viruses?

Poliomyelitis

Measles

Small pox

Yellow fever

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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

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An important host defense of human beings is a dense resident microbiota associated with

bladder

uterus

vagina

lungs

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Coxsackie virus B3, a subgroup of enteroviruses, commonly causes

gastroenteritis

acute hemorrhagic conjunctivitis

myocarditis

muscular dystrophy

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

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

Both organisms cause skin and respiratory tract infections

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