Microorganisms and Disease
Both Mycobacterium tuberculosis and Streptococcus pneumoniae

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

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Microorganisms and Disease
Which of the following is true regarding anthrax?

Anthrax is caused by a virus
Inhalation anthrax and cutaneous anthrax are caused by separate strains of Bacillus anthracis
Inhalation Anthrax requires infection with a large number of spores
Anthrax is highly contagious

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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

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
activate T cells to proliferate and secrete cytokines

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