Question 1

Gums bleeding while brushing oneʹs teeth is most commonly associated with

Accepted Answer

A)   gingivitis.
B)   cavities.
C)   periodontitis.
D)   trench mouth.
E)   halitosis.F) A) and C)
G) None of the above

Question 2

An outbreak of viral gastroenteritis occurs in a pediatrics ward. Rotavirus is the most likely causative agent.

Accepted Answer

A) True 
 B)False  True

Question 3

Most of the normal microbiota of the digestive system are found in the

Accepted Answer

A)   stomach and small intestine.
B)   stomach.
C)   small intestine and large intestine.
D)   mouth.
E)   accessory structures.F) B) and C)
G) A) and E)

Question 4

A 38-year-old man had onset of fever, chills, nausea, and myalgia while vacationing on the Gulf of Mexico. On April 29, he had eaten raw oysters and gone wading in the warm coastal waters. On May 2, he was admitted to a hospital because of a fever of 39°C and two circular necrotic lesions on the left leg. He had a history of alcoholic liver disease. He was transferred to the ICU; therapy with antibiotics was initiated. On May 4, he died. Which of the following is the most likely cause?

Accepted Answer

A)   Vibrio vulnificus
B)   Cyclospora cayetanensis
C)   Salmonella typhi
D)   hepatitis C virus
E)   Bacillus cereusF) A) and E)
G) A) and B)

Question 5

All of the following pertain to pinworm infections EXCEPT

Accepted Answer

A)   all family members living with the patient must also be treated.
B)   it is a helminth disease.
C)   diagnosis is by detecting eggs on transparent tape pressed to the perianal area.
D)   transmission is typically by contact with fomites or inhalation of eggs.
E)   it is most commonly transmitted by cysts in water.F) A) and D)
G) C) and D)

Question 6

Which of the following pertains to typhoid fever?

Accepted Answer

A)   It is caused by several different species of Salmonella.
B)   It is also called bacillary dysentery.
C)   It is acquired via ingestion of contaminated meat.
D)   Causative microorganism multiplies in patient phagocytes.
E)   Enterotoxin spreads via the blood.F) A) and B)
G) C) and E)

Question 7

Microscopic examination of a patientʹs fecal culture shows spiral bacteria. The bacteria probably belong to the genus

Accepted Answer

A)   Campylobacter jejuni.
B)   Salmonella typhi.
C)   Shigella spp.
D)   Escherichia coli.
E)   Vibrio cholerae.F) C) and E)
G) A) and D)

Question 8

The most common cause of travelerʹs diarrhea is

Accepted Answer

A)   Escherichia coli.
B)   Salmonella enterica.
C)   Campylobacter jejuni.
D)   Giardia lamblia.
E)   Shigella spp.F) B) and E)
G) A) and E)

Question 9

Bacterial intoxications differ from bacterial infections of the digestive system in that intoxications

Accepted Answer

A)   are accompanied by high fever.
B)   are more severe.
C)   are transmitted via contaminated water.
D)   are treated with antibiotics.
E)   have shorter incubation times.F) A) and C)
G) A) and E) E

Question 10

Clostridium difficile-associated diarrhea is usually preceded by

Accepted Answer

A)   travel to an underdeveloped country.
B)   eating contaminated food.
C)   extended use of antibiotics.
D)   a blood transfusion.
E)   improper food storage.F) A) and C)
G) A) and E)

Question 11

Epidemics related to bacterial infection of the digestive system are typically caused by

Accepted Answer

A)   the respiratory route.
B)   contaminated food and water.
C)   unpasteurized milk.
D)   exposure to contaminated soil.
E)   biological vectors.F) None of the above
G) B) and C)

Question 12

Which of the following causes inflammation of the liver?

Accepted Answer

A)   hepatitis A virus
B)   Salmonella enterica
C)   Escherichia coli
D)   Shigella spp.
E)   Vibrio choleraeF) A) and B)
G) A) and D)

Question 13

Which of the following organisms is likely to be transmitted via contaminated shrimp?

Accepted Answer

A)   Staphylococcus aureus
B)   Clostridium perfringens
C)   Vibrio parahaemolyticus
D)   Trichinella spiralis
E)   Giardia lambliaF) A) and B)
G) A) and D)

Question 14

Which of the following is included in GALT?

Accepted Answer

A)   liver
B)   salivary glands
C)   thymus
D)   tonsils
E)   Peyerʹs patchesF) A) and B)
G) A) and C) E

Question 15

Which of the following organisms feeds on red blood cells?

Accepted Answer

A)   Giardia lamblia
B)   Taenia spp.
C)   Escherichia coli
D)   Entamoeba histolytica
E)   Vibrio parahaemolyticusF) A) and C)
G) B) and D)

Question 16

All of the following are eukaryotic organisms that cause diarrheal disease EXCEPT

Accepted Answer

A)   Entamoeba.
B)   Cryptosporidium.
C)   Campylobacter.
D)   Giardia.
E)   Cyclospora.F) A) and C)
G) A) and D)

Question 17

Which of the following is mismatched?

Accepted Answer

A)   pinworm infestation - humans ingest parasiteʹs eggs
B)   hydatid disease - humans are the definitive host
C)   trichinellosis - humans eat larva of parasite
D)   Taenia infestation - humans are the definitive host
E)   hookworm infestation - parasite bores through skinF) All of the above
G) A) and D)

Question 18

Typhoid fever differs from salmonellosis in that in typhoid fever

Accepted Answer

A)   the incubation period is much longer.
B)   the microorganisms multiply within macrophages.
C)   the symptoms are due to infection of the gallbladder.
D)   infection occurs due to ingestion of endospores.
E)   infection is spread only in the feces of domesticated animals.F) A) and E)
G) A) and D)

Question 19

Which of the following organisms is likely to be transmitted via undercooked pork and horse?

Accepted Answer

A)   Shigella spp.
B)   Staphylococcus aureus
C)   Salmonella enterica
D)   Trichinella spiralis
E)   Entamoeba histolyticaF) A) and B)
G) B) and C)

Question 20

Dental plaque is an example of

Accepted Answer

A)   a pellicle.
B)   tooth enamel.
C)   dentin.
D)   gingivitis.
E)   a biofilm.F) A) and B)
G) C) and D)

Exam 25: Microbial Diseases of the Digestive System

Gums bleeding while brushing oneʹs teeth is most commonly associated with

Correct Answer
verified

An outbreak of viral gastroenteritis occurs in a pediatrics ward. Rotavirus is the most likely causative agent.

Correct Answer
verified
True

Most of the normal microbiota of the digestive system are found in the

Correct Answer
verified

Correct Answer
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All of the following pertain to pinworm infections EXCEPT

Correct Answer
verified

Which of the following pertains to typhoid fever?

Correct Answer
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Microscopic examination of a patientʹs fecal culture shows spiral bacteria. The bacteria probably belong to the genus

Correct Answer
verified

The most common cause of travelerʹs diarrhea is

Correct Answer
verified

Bacterial intoxications differ from bacterial infections of the digestive system in that intoxications

Correct Answer
verified
E

Clostridium difficile-associated diarrhea is usually preceded by

Correct Answer
verified

Epidemics related to bacterial infection of the digestive system are typically caused by

Correct Answer
verified

Which of the following causes inflammation of the liver?

Correct Answer
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Which of the following organisms is likely to be transmitted via contaminated shrimp?

Correct Answer
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Which of the following is included in GALT?

Correct Answer
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E

Which of the following organisms feeds on red blood cells?

Correct Answer
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All of the following are eukaryotic organisms that cause diarrheal disease EXCEPT

Correct Answer
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Which of the following is mismatched?

Correct Answer
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Typhoid fever differs from salmonellosis in that in typhoid fever

Correct Answer
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Which of the following organisms is likely to be transmitted via undercooked pork and horse?

Correct Answer
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Dental plaque is an example of

Correct Answer
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Exam 25: Microbial Diseases of the Digestive System

Gums bleeding while brushing oneʹs teeth is most commonly associated with

Correct AnswerverifiedShow Answer

An outbreak of viral gastroenteritis occurs in a pediatrics ward. Rotavirus is the most likely causative agent.

Correct AnswerverifiedTrue

Most of the normal microbiota of the digestive system are found in the

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

All of the following pertain to pinworm infections EXCEPT

Correct AnswerverifiedShow Answer

Which of the following pertains to typhoid fever?

Correct AnswerverifiedShow Answer

Microscopic examination of a patientʹs fecal culture shows spiral bacteria. The bacteria probably belong to the genus

Correct AnswerverifiedShow Answer

The most common cause of travelerʹs diarrhea is

Correct AnswerverifiedShow Answer

Bacterial intoxications differ from bacterial infections of the digestive system in that intoxications

Correct AnswerverifiedE

Clostridium difficile-associated diarrhea is usually preceded by

Correct AnswerverifiedShow Answer

Epidemics related to bacterial infection of the digestive system are typically caused by

Correct AnswerverifiedShow Answer

Which of the following causes inflammation of the liver?

Correct AnswerverifiedShow Answer

Which of the following organisms is likely to be transmitted via contaminated shrimp?

Correct AnswerverifiedShow Answer

Which of the following is included in GALT?

Correct AnswerverifiedE

Which of the following organisms feeds on red blood cells?

Correct AnswerverifiedShow Answer

All of the following are eukaryotic organisms that cause diarrheal disease EXCEPT

Correct AnswerverifiedShow Answer

Which of the following is mismatched?

Correct AnswerverifiedShow Answer

Typhoid fever differs from salmonellosis in that in typhoid fever

Correct AnswerverifiedShow Answer

Which of the following organisms is likely to be transmitted via undercooked pork and horse?

Correct AnswerverifiedShow Answer

Dental plaque is an example of

Correct AnswerverifiedShow Answer

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True

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E

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E

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