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

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

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Microorganisms and Disease
The influenza vaccine is administered each year because

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

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Microorganisms and Disease
What is common in catheters and ventilators?

Bacteria responsible for associated infections are usually susceptible to antibiotics
They are used primarily in neonatal intensive care units
They bypass important defenses of the body
They predispose patients to viral rather than bacterial infections

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