Question 1

Shigella species have all of the following characteristics except

Accepted Answer

A)  they are non-motile,gram-negative bacilli.
B)  the reservoir is human carriers.
C)  they produce urease and hydrogen sulfide.
D)  they infect the large intestine.
E)  they produce an enterotoxin,called shiga toxin.F) A) and D)
G) B) and D)

Question 2

Hepatitis B virus

Accepted Answer

A)  is principally transmitted by blood.
B)  transmission risks include shared needles,anal intercourse,and heterosexual intercourse.
C)  is transmitted to the newborns from chronic carrier mothers.
D)  has many chronic carriers.
E)  All of the choices are correct.F) B) and C)
G) C) and D)

Question 3

Entamoeba histolytica is acquired by

Accepted Answer

A)  ingestion of cysts of the pathogen.
B)  contaminated food.
C)  contaminated water.
D)  anal-oral sexual contact.
E)  All of the choices are correct.F) C) and E)
G) A) and B)

Question 4

The most common bacterial cause of diarrhea in the United States is

Accepted Answer

A)  E.coli.
B)  Salmonella.
C)  Shigella.
D)  Campylobacter.
E)  Yersinia.F) B) and D)
G) A) and B)

Question 5

The most common cause of liver cancer in the United States is

Accepted Answer

A)  HAV.
B)  HBV.
C)  HCV.
D)  HDV.
E)  HEV.F) B) and D)
G) B) and C)

Question 6

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

Accepted Answer

A)  Vibrio vulnificus
B)  Vibrio parahaemolyticus
C)  Vibrio cholerae
D)  Campylobacter jejuni
E)  Helicobacter pyloriF) A) and C)
G) A) and D)

Question 7

Mumps causes permanent sterility in young male adults.

Accepted Answer

A) True 
 B)False

Question 8

Watching the news,you are listening to a current story about a cruiseship in the Carribbean having an outbreak of diarrheal illness on board,affecting hundreds of people.Thinking about all of those people together in a small area like a ship,opening and closing doors,using handrails,etc,you are trying to figure out what infectious agent it is likely to be.Your most likely guess is that the pathogen is:

Accepted Answer

A)  cholera
B)  norovirus
C)  Clostridium difficile
D)  hepatitis BE) None of the above
F) A) and B)

Question 9

Boiling will not inactivate Giardia lamblia cysts in contaminated water.

Accepted Answer

A) True 
 B)False

Question 10

Outbreaks of which apicomplexan disease have been associated with fecal-contaminated imported raspberries,fresh greens,and drinking water?

Accepted Answer

A)  cryptosporidiosis
B)  cyclosporiasis
C)  trichinosis
D)  toxoplasmosisE) A) and C)
F) C) and D)

Question 11

Enteropathogenic E.coli (EPEC)causes gut effacement with shiga toxin.

Accepted Answer

A) True 
 B)False

Question 12

Salmonelloses are

Accepted Answer

A)  not caused by Salmonella typhi.
B)  associated with undercooked poultry and eggs,and reptile and rodent feces.
C)  gastroenteritis with vomiting and diarrhea.
D)  treated with fluid and electrolyte replacement.
E)  All of the choices are correct.F) B) and E)
G) A) and D)

Question 13

The primary viral cause of chronic diarrhea globally is

Accepted Answer

A)  Cryptosporidium.
B)  rotavirus.
C)  adenovirus.
D)  norovirus.
E)  astrovirus.F) A) and C)
G) C) and E)

Question 14

Which of the following antigen types found in gram-negative enterics is mismatched?

Accepted Answer

A)  H antigen - flagellar
B)  K antigen - capsule
C)  O antigen - cell wall
D)  All of the choices are correct.
E)  None of the choices is correct.F) A) and B)
G) B) and D)

Question 15

Only feces from humans that contaminates food and water can be involved in transmission of amoebiasis.

Accepted Answer

A) True 
 B)False

Question 16

Characteristics of trichinosis include

Accepted Answer

A)  encysted larvae getting ingested.
B)  association with undercooked pork or bear meat.
C)  migration from intestines to blood and various body tissues.
D)  coiled larvae encyst in skeletal muscle
E)  All of the choices are correct.F) B) and D)
G) D) and E)

Question 17

The most common infectious disease in humans is

Accepted Answer

A)  the common cold.
B)  dental caries.
C)  pharyngitis.
D)  diarrhea.
E)  gastritis.F) A) and B)
G) A) and D)

Question 18

E.coli O157:H7 characteristics include all of the following except it

Accepted Answer

A)  only causes occupational illness in people who work with animals.
B)  is transmitted by ingestion of contaminated,undercooked food,especially hamburger.
C)  causes a bloody diarrhea.
D)  has a reservoir inside of cattle intestines.E) All of the above
F) B) and D)

Question 19

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

Accepted Answer

A) True 
 B)False

Question 20

Most antihelminthic medications act only against the pathogens,not the human host.

Accepted Answer

A) True 
 B)False

Exam 22: Infectious Diseases Affecting the Gastrointestinal Tract

Salmonelloses are

Correct Answer
verified

Shigella species have all of the following characteristics except

Correct Answer
verified

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

Correct Answer
verified

The primary viral cause of chronic diarrhea globally is

Correct Answer
verified

Outbreaks of which apicomplexan disease have been associated with fecal-contaminated imported raspberries,fresh greens,and drinking water?

Correct Answer
verified

Characteristics of trichinosis include

Correct Answer
verified

Hepatitis B virus

Correct Answer
verified

Boiling will not inactivate Giardia lamblia cysts in contaminated water.

Correct Answer
verified

Entamoeba histolytica is acquired by

Correct Answer
verified

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

Correct Answer
verified

Correct Answer
verified

The most common infectious disease in humans is

Correct Answer
verified

The most common cause of liver cancer in the United States is

Correct Answer
verified

Most antihelminthic medications act only against the pathogens,not the human host.

Correct Answer
verified

E.coli O157:H7 characteristics include all of the following except it

Correct Answer
verified

Mumps causes permanent sterility in young male adults.

Correct Answer
verified

Which of the following antigen types found in gram-negative enterics is mismatched?

Correct Answer
verified

Enteropathogenic E.coli (EPEC)causes gut effacement with shiga toxin.

Correct Answer
verified

Only feces from humans that contaminates food and water can be involved in transmission of amoebiasis.

Correct Answer
verified

The most common bacterial cause of diarrhea in the United States is

Correct Answer
verified

Exam 22: Infectious Diseases Affecting the Gastrointestinal Tract

Salmonelloses are

Correct AnswerverifiedShow Answer

Shigella species have all of the following characteristics except

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The primary viral cause of chronic diarrhea globally is

Correct AnswerverifiedShow Answer

Outbreaks of which apicomplexan disease have been associated with fecal-contaminated imported raspberries,fresh greens,and drinking water?

Correct AnswerverifiedShow Answer

Characteristics of trichinosis include

Correct AnswerverifiedShow Answer

Hepatitis B virus

Correct AnswerverifiedShow Answer

Boiling will not inactivate Giardia lamblia cysts in contaminated water.

Correct AnswerverifiedShow Answer

Entamoeba histolytica is acquired by

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The most common infectious disease in humans is

Correct AnswerverifiedShow Answer

The most common cause of liver cancer in the United States is

Correct AnswerverifiedShow Answer

Most antihelminthic medications act only against the pathogens,not the human host.

Correct AnswerverifiedShow Answer

E.coli O157:H7 characteristics include all of the following except it

Correct AnswerverifiedShow Answer

Mumps causes permanent sterility in young male adults.

Correct AnswerverifiedShow Answer

Which of the following antigen types found in gram-negative enterics is mismatched?

Correct AnswerverifiedShow Answer

Enteropathogenic E.coli (EPEC)causes gut effacement with shiga toxin.

Correct AnswerverifiedShow Answer

Only feces from humans that contaminates food and water can be involved in transmission of amoebiasis.

Correct AnswerverifiedShow Answer

The most common bacterial cause of diarrhea in the United States is

Correct AnswerverifiedShow Answer

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