Microorganisms and Disease
Type III secretion systems are used to inject "effector" proteins directly into a host cell. Salmonella uses a type III secretion system to help the pathogen to

survive the acid pH of the stomach
survive within macrophages
activate T cells to proliferate and secrete cytokines
secrete LT (heat labile toxin) and ST (heat stable toxin) into the lumen of the intestine

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Microorganisms and Disease
Prontosil is

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

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

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