Microorganisms and Disease
Both Mycobacterium tuberculosis and Streptococcus pneumoniae

are acquired by inhalation
have polysaccharide capsules
have cell walls that contain a high content of mycolic acids
stay in the lung and rarely, if ever, enter the bloodstream

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Microorganisms and Disease
The influenza vaccine is administered each year because

None of these
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
mutations in the viral hemagglutinin may allow the virus to evade the immune response elicited by previous vaccines

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Microorganisms and Disease
Prontosil is

an effective antibacterial when used in in-vitro cultures
an effective antibacterial both in animals as well as in in-vitro cultures
an effective antibacterial when used in animals
not used as an antibacterial agent

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

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

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