Question 1

Which of the following is not a helminth that causes intestinal symptoms accompanied by migratory symptoms?

Accepted Answer

A)   Necator americanus
B)   Toxocara
C)   Ascaris lumbricoides
D)   Trichuris trichiuraE) All of the above
F) A) and B)

Question 2

From the surface to the interior of a tooth,the tissues in order are

Accepted Answer

A)   enamel, pulp, and dentin.
B)   pulp, dentin, and enamel.
C)   dentin, pulp, and enamel.
D)   enamel, dentin, and pulp.
E)   dentin, enamel, and pulp.F) A) and E)
G) None of the above

Question 3

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

Accepted Answer

A)  Blood and pus are found in the stool.
B)  High fever is present.
C)  It makes no heat-labile or heat-stable exotoxins.
D)  Prompt treatment with a broad-spectrum antibiotic is essential to recover from an infection.
E)  It invades the gut mucosa.F) A) and D)
G) None of the above

Question 4

Defenses of the GI tract against pathogens include ______.

Accepted Answer

A)   mucus, acid, and saliva
B)   secretory IgA and lysozyme
C)   peristalsis
D)   GALT (gut-associated lymphoid tissue) 
E)   All of the choices are correct.F) B) and E)
G) B) and D)

Question 5

Mumps causes permanent sterility in young male adults.

Accepted Answer

A) True 
 B)False

Question 6

Oral bacteria on the tooth surface

Accepted Answer

A)   develop a biofilm.
B)   use fimbriae and slime layers to adhere.
C)   metabolize sucrose, produce sticky glucans, and form plaque.
D)   All of the above are correct.E) A) and B)
F) B) and D)

Question 7

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

Accepted Answer

A)   Vibrio vulnificus
B)   Helicobacter pylori
C)   Vibrio cholerae
D)   Campylobacter jejuni
E)   Vibrio parahaemolyticusF) B) and E)
G) B) and C)

Question 8

Infection with which apicomplexan has been associated with fecal-contaminated drinking water?

Accepted Answer

A)   Entamoeba histolytica
B)   Ascaris lumbricoides
C)   Cryptosporidium
D)   RotavirusE) C) and D)
F) A) and B)

Question 9

Escherichia coli infections

Accepted Answer

A)   are often transmitted by fecal contaminated water and food.
B)   include EIEC that destroys gut mucosa.
C)   involve enterotoxin in traveler's diarrhea.
D)   are self-limiting with the only treatment being rehydration.
E)   All of the choices are correct.F) B) and E)
G) C) and D) E

Question 10

Symptoms of cryptosporidiosis include

Accepted Answer

A)   bloody, mucus-filled stools and fever.
B)   headache, sweats, vomiting, severe abdominal cramps, and diarrhea.
C)   chills, fever, and sweats.
D)   a red skin papule that spreads to a large ulcer.E) C) and D)
F) B) and C)

Question 11

The gastrointestinal tract has both a long tube that nutrients traverse from mouth to anus and accessory organs that aid in food digestion.From the following list of organs in the digestive system,identify the mismatch.

Accepted Answer

A)   Rectum; part of the digestive tube
B)   Liver; part of the digestive tube
C)   Pharynx; part of the digestive tube
D)   Appendix; accessory organ
E)   Salivary glands; accessory organF) B) and E)
G) C) and E)

Question 12

Which of the following statements regarding Clostridium difficile infection is incorrect?

Accepted Answer

A)   It is a colitis that is a superinfection.
B)   It is associated with disruption of normal biota due to broad-spectrum antimicrobials.
C)   It is due to ingestion of contaminated, improperly stored, cooked meats and gravies.
D)   It is the major cause of diarrhea in hospitals.E) C) and D)
F) A) and B) C

Question 13

Which of the following statements regarding shiga toxin-producing E.coli is correct?

Accepted Answer

A)  It synthesizes shiga exotoxin from a bacteriophage.
B)  It synthesizes shiga exotoxin from the E.coli chromosome.
C)  It synthesizes shiga endotoxin from a bacteriophage.
D)  It synthesizes shiga endotoxin from the E.coli chromosome.E) A) and C)
F) C) and D)

Question 14

Shiga toxin-producing E.coli characteristics include all of the following except that it

Accepted Answer

A)  has a reservoir inside of cattle intestines.
B)  causes a bloody diarrhea.
C)   in some cases,leads to the development of hemolytic uremic syndrome (HUS) with possible kidney failure
D)  is transmitted by ingestion of contaminated,undercooked food,especially hamburger.
E)  only causes occupational illness in people who work with animals.F) B) and C)
G) D) and E) E

Question 15

Which of the following groups of microorganisms is not found among the normal gut microbiota?

Accepted Answer

A)   Firmicutes (Streptococcus, Staphylococcus, Clostridium, Bacillus) 
B)   Protozoa (Entamoeba, Trichomonas) 
C)   Enterics (Escherichia, Enterobacter) 
D)   Spirilla (Leptospira, Borrelia) 
E)   Fungi (Candida) F) B) and E)
G) A) and B)

Question 16

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 matches.E) A) and B)
F) All of the above

Question 17

Antibiotics are used to treat diarrhea caused by shiga toxin-producingE.coli.

Accepted Answer

A) True 
 B)False

Question 18

The primary viral cause of chronic diarrhea globally is ______.

Accepted Answer

A)   rotavirus
B)   Cryptosporidium
C)   arbovirus
D)   adenovirus
E)   norovirusF) B) and E)
G) A) and B)

Question 19

Which of the following is not true of enterotoxigenic

Accepted Answer

A)   It causes traveler's diarrhea.
B)   It can be life-threatening in infants.
C)   It causes a high fever.
D)   Fluid replacement is vital to surviving an infection.
E)   coli (ETE
C)  ?F) A) and E)
G) C) and E)

Question 20

Which of the following statements comparing Enterobius vermicularis and Diphyllobothrium latum is incorrect?

Accepted Answer

A)  D.latum has fish as an intermediate host,whereas E.vermicularis has no intermediate host.
B)  Both helminths affect primarily children.
C)  Symptoms of both infections are mild.
D)  E.vermicularis is best treated with mebendazole,whereas D.latum is susceptible to praziquantel.E) All of the above
F) B) and C)

Exam 22: Infectious Diseases Affecting the Gastrointestinal Tract

Which of the following is not a helminth that causes intestinal symptoms accompanied by migratory symptoms?

Correct AnswerverifiedShow Answer

From the surface to the interior of a tooth,the tissues in order are

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Defenses of the GI tract against pathogens include ______.

Correct AnswerverifiedShow Answer

Mumps causes permanent sterility in young male adults.

Correct AnswerverifiedShow Answer

Oral bacteria on the tooth surface

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Infection with which apicomplexan has been associated with fecal-contaminated drinking water?

Correct AnswerverifiedShow Answer

Escherichia coli infections

Correct AnswerverifiedE

Symptoms of cryptosporidiosis include

Correct AnswerverifiedShow Answer

The gastrointestinal tract has both a long tube that nutrients traverse from mouth to anus and accessory organs that aid in food digestion.From the following list of organs in the digestive system,identify the mismatch.

Correct AnswerverifiedShow Answer

Which of the following statements regarding Clostridium difficile infection is incorrect?

Correct AnswerverifiedC

Which of the following statements regarding shiga toxin-producing E.coli is correct?

Correct AnswerverifiedShow Answer

Shiga toxin-producing E.coli characteristics include all of the following except that it

Correct AnswerverifiedE

Which of the following groups of microorganisms is not found among the normal gut microbiota?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Antibiotics are used to treat diarrhea caused by shiga toxin-producingE.coli.

Correct AnswerverifiedShow Answer

The primary viral cause of chronic diarrhea globally is ______.

Correct AnswerverifiedShow Answer

Which of the following is not true of enterotoxigenic

Correct AnswerverifiedShow Answer

Which of the following statements comparing Enterobius vermicularis and Diphyllobothrium latum is incorrect?

Correct AnswerverifiedShow Answer

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E

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E

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