Question 1

Research does not indicate a link between the numbers and types of bacteria causing periodontitis and thicker carotid arteries in an individual.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following statements regarding Campylobacter jejuni is incorrect?

Accepted Answer

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

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

Which of the following statements regarding schistosomiasis is incorrect?

Accepted Answer

A)   Schistosomiasis is transmitted by exposing the skin to a water source that has been contaminated with sewage.
B)   There is only a single drug available to treat Schistosoma infection, praziquantel, and drug- resistant strains are beginning to arise.
C)   Eﬃcacy of treatment is assess by observing fecal samples placed in water for whether eggs can hatch to release live miracidia.
D)   Once a person has recovered from an infection with Schistosoma mansoni, they are protected with lifelong immunity.E) A) and B)
F) A) and C)

Question 5

Which of the following statements concerning archaea in the microbiome is correct?

Accepted Answer

A)   Archaea evolved under extreme conditions and are not commensal with humans.
B)   Methanogens are associated with anaerobic regions of the gut and the gingival pockets.
C)   The human body is a hostile environment for archaea.
D)   Archaeal infections are treated with translation inhibitors, as their ribosomes are the same as bacterial ribosomes.E) B) and C)
F) A) and D)

Question 6

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 agalactiaeF) C) and D)
G) A) and B)

Question 7

Which of the following statements about parasitic helminths is incorrect?

Accepted Answer

A)   They include roundworms and tapeworms.
B)   They have larval forms that do not affect humans.
C)   They have a deﬁnitive host in which the adult form lives.
D)   They are multicellular animals.E) C) and D)
F) A) and B)

Question 8

Cells of the immune system are not found in which of the following tissues in the gastrointestinal tract?

Accepted Answer

A)   Peyer's patches
B)   Appendix
C)   Tonsils and adenoids
D)   Tooth enamelE) All of the above
F) None of the above

Question 9

Which of the following is not a helminth that causes primarily intestinal symptoms?

Accepted Answer

A)   Enterobius vermicularis
B)   Trichuris trichiura
C)   Taenia solium
D)   Diphyllobothrium latumE) A) and B)
F) B) and C)

Question 10

Trichinella species spend their entire life within the body of a mammalian host, but can move from one species to another upon consumption of an infected animal. Which of the following statements regarding trichinosis is incorrect?

Accepted Answer

A)   Affected muscle tissue has multiple cysts. Upon consumption, this generates a population that includes both males and females for the infection to propagate.
B)   Venison (deer)  is safe from trichinosis because deer are herbivores not carnivores.
C)   An important hazard of consuming roadkill meats is the potential presence of Trichinella cysts.
D)   Ground pork is safe, as the grinding process both inactivates the Trichinella cysts and mixes it with meats from multiple animals, effectively diluting any remaining cysts.E) C) and D)
F) B) and D)

Question 11

Just back from a trip to South America, 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 fecal sample to the microbiology lab for them to look at it under the light microscope. Based upon this protocol selection, the physician believes that you have ______.

Accepted Answer

A)   hepatitis A
B)   amoebiasis
C)   rotavirus
D)   salmonellosis
E)   choleraF) A) and D)
G) B) and C)

Question 12

Which is not a characteristic of Helicobacter pylori?

Accepted Answer

A)   Gram-negative
B)   Curved rods
C)   Produces enteroxin that causes diarrhea
D)   Lives in the stomach
E)   Produces urease to buffer stomach acidityF) B) and E)
G) B) and D)

Question 13

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 C)

Question 14

Inﬂammation of the liver with necrosis of the hepatocytes and swelling due to a mononuclear response is a disease called ______.

Accepted Answer

A)   hepatitis
B)   cirrhosis
C)   mononucleosis
D)   jaundiceE) None of the above
F) All of the above

Question 15

Which of the following statements is incorrect about Staphylococcus aureus food intoxication?

Accepted Answer

A)   Food left unrefrigerated for several hours is at risk for contamination.
B)   Common affected foods include custards, ham, cream pastries, and processed meats.
C)   Ingestion of the pathogen allows it to multiply and damage the GI tract lining.
D)   Food becomes contaminated by a human carrier.
E)   Symptoms come on quickly and include nausea, vomiting, and diarrhea.F) A) and B)
G) None of the above

Question 16

The gastrointestinal microbiota has been implicated in the development of _______.

Accepted Answer

A)   non-infectious diseases like obesity
B)   appropriate immune responses to microbial antigens
C)   dental plaque
D)   All of the choices are correct.E) B) and D)
F) All of the above

Question 17

Which of the following is not a virulence factor associated with helminths?

Accepted Answer

A)   Thick cuticle to escape detection from the host immune system
B)   Secretion of toxins
C)   Specialized structures for attachment to host tissues
D)   Degradative enzymes to damage host tissueE) A) and C)
F) B) and C)

Question 18

Which of the following symptoms of trichinosis is most indicative of this disease?

Accepted Answer

A)   Puﬃness around the eyes
B)   Eosinophilia
C)   Shortness of breath
D)   Abdominal painE) B) and C)
F) A) and B)

Question 19

There are no infectious agents that can penetrate intact skin.

Accepted Answer

A) True 
 B)False

Question 20

The most common infectious disease in humans is ______.

Accepted Answer

A)   diarrhea
B)   the common cold
C)   dental caries
D)   pharyngitis
E)   gastritisF) B) and D)
G) A) and E)

Exam 22: Infectious Diseases Affecting the Gastrointestinal Tract

Research does not indicate a link between the numbers and types of bacteria causing periodontitis and thicker carotid arteries in an individual.

Correct Answer
verified

Which of the following is not a virulence factor associated with helminths?

Correct Answer
verified

Cholera symptoms are _______.

Correct Answer
verified

Which of the following statements is incorrect about Staphylococcus aureus food intoxication?

Correct Answer
verified

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

Correct Answer
verified

Which of the following is not a helminth that causes primarily intestinal symptoms?

Correct Answer
verified

Trichinella species spend their entire life within the body of a mammalian host, but can move from one species to another upon consumption of an infected animal. Which of the following statements regarding trichinosis is incorrect?

Correct Answer
verified

Which is not a characteristic of Helicobacter pylori?

Correct Answer
verified

Which of the following statements regarding Campylobacter jejuni is incorrect?

Correct Answer
verified

Cells of the immune system are not found in which of the following tissues in the gastrointestinal tract?

Correct Answer
verified

There are no infectious agents that can penetrate intact skin.

Correct Answer
verified

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

Correct Answer
verified

The most common infectious disease in humans is ______.

Correct Answer
verified

Which of the following symptoms of trichinosis is most indicative of this disease?

Correct Answer
verified

Which of the following statements concerning archaea in the microbiome is correct?

Correct Answer
verified

Inﬂammation of the liver with necrosis of the hepatocytes and swelling due to a mononuclear response is a disease called ______.

Correct Answer
verified

Which of the following statements about parasitic helminths is incorrect?

Correct Answer
verified

Correct Answer
verified

The gastrointestinal microbiota has been implicated in the development of _______.

Correct Answer
verified

Which of the following statements regarding schistosomiasis is incorrect?

Correct Answer
verified

Exam 22: Infectious Diseases Affecting the Gastrointestinal Tract

Research does not indicate a link between the numbers and types of bacteria causing periodontitis and thicker carotid arteries in an individual.

Correct AnswerverifiedShow Answer

Which of the following is not a virulence factor associated with helminths?

Correct AnswerverifiedShow Answer

Cholera symptoms are _______.

Correct AnswerverifiedShow Answer

Which of the following statements is incorrect about Staphylococcus aureus food intoxication?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is not a helminth that causes primarily intestinal symptoms?

Correct AnswerverifiedShow Answer

Trichinella species spend their entire life within the body of a mammalian host, but can move from one species to another upon consumption of an infected animal. Which of the following statements regarding trichinosis is incorrect?

Correct AnswerverifiedShow Answer

Which is not a characteristic of Helicobacter pylori?

Correct AnswerverifiedShow Answer

Which of the following statements regarding Campylobacter jejuni is incorrect?

Correct AnswerverifiedShow Answer

Cells of the immune system are not found in which of the following tissues in the gastrointestinal tract?

Correct AnswerverifiedShow Answer

There are no infectious agents that can penetrate intact skin.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The most common infectious disease in humans is ______.

Correct AnswerverifiedShow Answer

Which of the following symptoms of trichinosis is most indicative of this disease?

Correct AnswerverifiedShow Answer

Which of the following statements concerning archaea in the microbiome is correct?

Correct AnswerverifiedShow Answer

Inﬂammation of the liver with necrosis of the hepatocytes and swelling due to a mononuclear response is a disease called ______.

Correct AnswerverifiedShow Answer

Which of the following statements about parasitic helminths is incorrect?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The gastrointestinal microbiota has been implicated in the development of _______.

Correct AnswerverifiedShow Answer

Which of the following statements regarding schistosomiasis is incorrect?

Correct AnswerverifiedShow Answer

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