Microorganisms and Disease
What is common in catheters and ventilators?

Bacteria responsible for associated infections are usually susceptible to antibiotics
They are used primarily in neonatal intensive care units
They predispose patients to viral rather than bacterial infections
They bypass important defenses of the body

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

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

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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

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

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