Question 1

A common food intoxication is caused by enterotoxin-producing strains of

Accepted Answer

A)  Staphylococcus aureus.
B)  Staphylococcus epidermidis.
C)  Staphylococcus saprophyticus.
D)  Streptococcus pyogenes.
E)  Streptococcus agalactiae.F) B) and E)
G) C) and D)

Question 2

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

Accepted Answer

A)  liver
B)  salivary glands
C)  pancreas
D)  large intestine
E)  small intestineF) A) and B)
G) B) and D) D

Question 3

Which of the following is not a virulence factor of E.coli O157:H7?

Accepted Answer

A)  secretes shiga exotoxin from a bacteriophage
B)  secretes shiga exotoxin from the
C)  protein called intimin for host attachment
D)  type III secretion system
E)  provides the receptor for intimin to attach to the hostF) A) and D)
G) A) and C)

Question 4

Which of the following is not a normal causative agent of acute diarrhea with vomiting (food poisoning) ?

Accepted Answer

A)  Clostridium perfringens
B)  Staphylococcus aureus exotoxin
C)  Clostridium difficile
D)  Bacillus cereusE) A) and B)
F) A) and C)

Question 5

All of the following are characteristics of Campylobacter jejuni except

Accepted Answer

A)  transmitted through ingestion of contaminated chicken,meat,milk,and water.
B)  causes fever and a watery to bloody diarrhea.
C)  infects the stomach.
D)  produces an enterotoxin that stimulates diarrhea.
E)  are gram-negative,curved rods with darting motility.F) C) and E)
G) A) and B)

Question 6

Which is mismatched?

Accepted Answer

A)  hepatitis A virus - nonenveloped,single-stranded RNA enterovirus
B)  hepatitis B virus - enveloped DNA virus
C)  hepatitis C virus - RNA virus
D)  hepatitis D virus - defective RNA virus that coinfects with HAV
E)  hepatitis E virus - self-limiting RNA virusF) A) and B)
G) A) and E)

Question 7

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

Accepted Answer

A)  Ascaris lumbricoides - enters through the skin
B)  Necator americanus - eggs are ingested
C)  Enterobius vermicularis - sexual transmission
D)  Taenia solium - eggs or larvae can be ingested
E)  Schistomoma species - carried by an insect vector into humanF) C) and D)
G) A) and E)

Question 8

Cholera symptoms are

Accepted Answer

A)  copious watery diarrhea.
B)  loss of blood volume.
C)  acidosis,sunken eyes,and thirst.
D)  hypotension,tachycardia,and shock.
E)  All of the choices are correct.F) A) and D)
G) A) and E)

Question 9

Gingivitis

Accepted Answer

A)  is primarily caused by normal anaerobic biota.
B)  involves the formation of calculus and plaque.
C)  involves a crevice in the gum along the tooth.
D)  may involve archaeal species.
E)  All of the choices are correct.F) All of the above
G) D) and E)

Question 10

Which is incorrect about Staphylococcus aureus food intoxication?

Accepted Answer

A)  Food gets contaminated by a human carrier.
B)  Common associated foods include custards,ham,cream pastries,and processed meats.
C)  Food is left unrefrigerated for several hours after contamination.
D)  Ingestion of the pathogen allows it to multiply and damage the GI tract lining.
E)  Symptoms come on quickly and include nausea,vomiting,and diarrhea.F) A) and E)
G) B) and E)

Question 11

Which of the following is not true of enterotoxigenic E.coli (ETEC) ?

Accepted Answer

A)  causes traveler's diarrhea
B)  has an A-B,heat labile exotoxin
C)  has heat-stable exotoxins
D)  causes a high feverE) A) and C)
F) C) and D)

Question 12

Parasitic helminths exhibit all of the following characteristics except

Accepted Answer

A)  are multicellular animals.
B)  have a definitive host where the adult form lives.
C)  have larval forms that do not affect humans.
D)  include roundworms.
E)  include tapeworms.F) C) and D)
G) All of the above

Question 13

Having just returned from a vacation in South America,you find that you now have a severe diarrheal illness.Your symptoms,other than diarrhea,are pain,cramps,some fecal blood,and fever.These are symptoms of many of the gastrointestinal diseases,so that information does not help you or the doctors identify the infectious agent.Your doctor wants to send a sample of your feces down to the microbiology lab for them to look at it under the light microscope.Based upon this protocol selection,the physician believes that have:

Accepted Answer

A)  cholera
B)  salmonellosis
C)  hepatitis A
D)  amoebiasis
E)  rotavirusF) B) and E)
G) C) and D)

Question 14

The only body fluid that can transmit Hepatitis B virus is blood.

Accepted Answer

A) True 
 B)False  False

Question 15

Liver flukes live in all of the following areas except the

Accepted Answer

A)  small intestine.
B)  liver.
C)  gallbladder.
D)  bile duct.E) All of the above
F) A) and C)

Question 16

Which of the following is not true of enterovasive E.coli (EIEC) ?

Accepted Answer

A)  produces shiga toxin
B)  invades gut mucosa
C)  blood and pus in the stool
D)  no heat-labile or heat-stable exotoxinsE) A) and C)
F) B) and D)

Question 17

Carriers of Hepatitis B virus are not common.

Accepted Answer

A) True 
 B)False

Question 18

All of the following pertain to Clostridium difficile infection except it

Accepted Answer

A)  is due to ingestion of contaminated,improperly stored,cooked meats and gravies.
B)  is a colitis that is a superinfection.
C)  often has an endogenous source.
D)  is associated with disruption of normal flora due to broad-spectrum antimicrobials.
E)  is the major cause of diarrhea in hospitals.F) A) and E)
G) All of the above

Question 19

Even as late as the1980s,the medical establishment thought that ulcers were caused by stress and the increase in gastricity acidity.How has the current understanding of ulcer development changed patient treatment,compared to treatments before 1980?

Accepted Answer

A)  Antibiotics are now used to treat ulcers.
B)  Doctors now give their patients sedatives to calm patients with ulcers.
C)  There is no treatment for ulcers,then or now.
D)  Different foods are now suggested for patients having ulcers.E) A) and B)
F) None of the above

Question 20

Escherichia coli infections

Accepted Answer

A)  All of the choices are correct.
B)  are often transmitted by fecal contaminated water and food.
C)  involve enterotoxin in traveler's diarrhea.
D)  include EIEC that destroys gut mucosa.
E)  are self-limiting with the only treatment being rehydration.F) A) and C)
G) None of the above A

Exam 22: Infectious Diseases Affecting the Gastrointestinal Tract

A common food intoxication is caused by enterotoxin-producing strains of

Correct Answer
verified

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

Correct Answer
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D

Which of the following is not a virulence factor of E.coli O157:H7?

Correct Answer
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Which of the following is not a normal causative agent of acute diarrhea with vomiting (food poisoning) ?

Correct Answer
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All of the following are characteristics of Campylobacter jejuni except

Correct Answer
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Which is mismatched?

Correct Answer
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Which of the following helminths is paired with a correct characteristic of its pathogenesis?

Correct Answer
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Cholera symptoms are

Correct Answer
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Gingivitis

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Which is incorrect about Staphylococcus aureus food intoxication?

Correct Answer
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Which of the following is not true of enterotoxigenic E.coli (ETEC) ?

Correct Answer
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Parasitic helminths exhibit all of the following characteristics except

Correct Answer
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The only body fluid that can transmit Hepatitis B virus is blood.

Correct Answer
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False

Liver flukes live in all of the following areas except the

Correct Answer
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Which of the following is not true of enterovasive E.coli (EIEC) ?

Correct Answer
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Carriers of Hepatitis B virus are not common.

Correct Answer
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All of the following pertain to Clostridium difficile infection except it

Correct Answer
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Even as late as the1980s,the medical establishment thought that ulcers were caused by stress and the increase in gastricity acidity.How has the current understanding of ulcer development changed patient treatment,compared to treatments before 1980?

Correct Answer
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Escherichia coli infections

Correct Answer
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A

Exam 22: Infectious Diseases Affecting the Gastrointestinal Tract

A common food intoxication is caused by enterotoxin-producing strains of

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedD

Which of the following is not a virulence factor of E.coli O157:H7?

Correct AnswerverifiedShow Answer

Which of the following is not a normal causative agent of acute diarrhea with vomiting (food poisoning) ?

Correct AnswerverifiedShow Answer

All of the following are characteristics of Campylobacter jejuni except

Correct AnswerverifiedShow Answer

Which is mismatched?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Cholera symptoms are

Correct AnswerverifiedShow Answer

Gingivitis

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Which is incorrect about Staphylococcus aureus food intoxication?

Correct AnswerverifiedShow Answer

Which of the following is not true of enterotoxigenic E.coli (ETEC) ?

Correct AnswerverifiedShow Answer

Parasitic helminths exhibit all of the following characteristics except

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The only body fluid that can transmit Hepatitis B virus is blood.

Correct AnswerverifiedFalse

Liver flukes live in all of the following areas except the

Correct AnswerverifiedShow Answer

Which of the following is not true of enterovasive E.coli (EIEC) ?

Correct AnswerverifiedShow Answer

Carriers of Hepatitis B virus are not common.

Correct AnswerverifiedShow Answer

All of the following pertain to Clostridium difficile infection except it

Correct AnswerverifiedShow Answer

Even as late as the1980s,the medical establishment thought that ulcers were caused by stress and the increase in gastricity acidity.How has the current understanding of ulcer development changed patient treatment,compared to treatments before 1980?

Correct AnswerverifiedShow Answer

Escherichia coli infections

Correct AnswerverifiedA

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D

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False

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A