Microorganisms and Disease
Lactoferrin helps to protect against pathogens by

facilitating the growth of normal flora
blocking sebum production
sequestering Iron
lowering the pH

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Microorganisms and Disease
Prontosil is

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

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Microorganisms and Disease
The influenza vaccine is administered each year because

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

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Microorganisms and Disease
Which of the following characteristic of the Rotavirus was important for the construction of the Rotashield vaccine?

The possession of a segmented RNA genome
A limited number of capsule types
The ability of the Rotavirus to be transmitted faster
The ability of monkey Rotavirus strains to cause serious illness (diarrhea) in human beings

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