Microorganisms and Disease
In the human disease cholera, what is it that actually ends up killing the victim?

Dehydration and loss of nutrients
Faulty carrier proteins
Too little water in the food stream
the toxin produced by the bacterium

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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

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

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