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Which of the following statements describes the main virulence factor of E.coli O157:H7?


A) A pathogen-encoded exotoxin
B) A bacteriophage-encoded exotoxin
C) An endotoxin used for host attachment
D) A coagulase for host clotting
E) A hemolysin for red blood cell destruction

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

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Which of the following helminths is paired with correct characteristics of its pathogenesis?


A) Ascaris lumbricoides - life and transmission cycle B
B) Necator americanus - life and transmission cycle A
C) Trichuris trichuria - life and transmission cycle B
D) Strongyloides stercoralis - life and transmission cycle B
E) Taenia solium - life and transmission cycle A

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

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In the absence of dietary carbohydrates,bacteria do not cause tooth decay.

A) True
B) False

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"Rice-water stools" are associated with disease caused by which organism?


A) Vibrio vulnificus
B) Vibrio parahaemolyticus
C) Vibrio cholerae
D) Campylobacter jejuni
E) Helicobacter pylori

F) B) and C)
G) A) and B)

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Which organ of the GI tract has a large commensal population of microorganisms?


A) Liver
B) Salivary glands
C) Pancreas
D) Large intestine
E) Small intestine

F) A) and D)
G) None of the above

Correct Answer

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The causative organism for mumps is ________.


A) Paramyxovirus
B) Morbillivirus
C) Streptococcus pyogenes
D) Corynebacterium
E) Vibrio

F) A) and D)
G) A) and C)

Correct Answer

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Signs and symptoms of cryptosporidiosis include ________.


A) headache,sweats,vomiting,severe abdominal cramps,and diarrhea
B) chills,fever,and sweats
C) bloody,mucus-filled stools and fever
D) a red-skin papule that spreads to a large ulcer
E) None of the choices are correct.

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

Correct Answer

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