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Despite acidic conditions,some microorganisms have been found residing within the human stomach.

A) True
B) False

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Defenses of the GI tract against pathogens include


A) mucus,acid,and saliva.
B) secretory IgA and lysozyme.
C) peristalsis.
D) GALT.
E) All of the choices are correct.

F) A) and B)
G) B) and D)

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Hepatitis B infection


A) has an incubation of 2 to 7 weeks.
B) can be transmitted by the fecal-oral route.
C) increases risk for hepatocellular cancer.
D) is responsible for most cases of post-transfusion hepatitis.

E) None of the above
F) A) and C)

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Orchitis and epididymitis are seen in young,adult males as a complication of


A) croup.
B) mumps.
C) influenza.
D) measles (rubeola) .
E) rubella.

F) C) and D)
G) D) and E)

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All of the following can be transmitted by drinking contaminated water except


A) cryptosporidiosis.
B) cyclosporiasis.
C) malaria.
D) Campylobacter.
E) giardiasis.

F) B) and E)
G) B) and C)

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