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 caused by a virus
Anthrax is highly contagious
Inhalation Anthrax requires infection with a large number of spores

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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
secrete LT (heat labile toxin) and ST (heat stable toxin) into the lumen of the intestine
survive within macrophages

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Microorganisms and Disease
A major difference between EHEC and EPEC is

EPEC rearranges host cell actin and EHEC does not
EPEC passes through the placenta to infect the fetus and EHEC does not
EHEC secretes a Shiga-like toxin and EPEC does not
EHEC possesses a type III secretion system and EPEC does not

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