Question 1

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) All of the above

Question 2

Which of the following is not true of schistosomiasis?

Accepted Answer

A)  Schistosomiasis covers its outer surface with blood proteins to escape detection by the immune system.
B)  Schistosomiasis is caused by blood flukes.
C)   Schisotosomiasis cases are beginning to appear in the southern U.S., as climate change brings warming waters to the region.
D)  Larvae called cercariae can penetrate intact skin through hair follicles.
E)  Freshwater snails are the intermediate host.F) A) and B)
G) B) and D)

Question 3

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

Accepted Answer

A)  Pancreas
B)  Liver
C)  Salivary glands
D)  Small intestine
E)  Large intestineF) C) and D)
G) A) and B)

Question 4

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) A) and C)
F) All of the above

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

The best treatment for acute diarrhea is oral replacement of electrolytes and water.

Accepted Answer

A) True 
 B)False

Question 7

Carriers of Hepatitis B virus are not common.

Accepted Answer

A) True 
 B)False

Question 8

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

Accepted Answer

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

Question 9

Which of the following statements regarding tapeworms is incorrect?

Accepted Answer

A)  Proglottids are reproductive segments.
B)  The body is comprised of proglottids.
C)   They can produce a variety of toxins.
D)  Cysticerci are young, infective larvae ingested in undercooked meat.
E)  The scolex is the head.F) A) and B)
G) C) and D)

Question 10

Most of the bacteria involved in periodontal disease are obligate (strict)  anaerobes.Explain why this is the case.

Accepted Answer

A)  Mouthwashes and toothpaste destroy most of the strict aerobes that are found on teeth.
B)  The oral cavity is a low oxygen environment.
C)   The crevice between the gingiva and the tooth is low in oxygen.
D)   Sugar and other carbohydrates used by the oral bacteria can be more easily consumed anaerobically.E) A) and B)
F) A) and C)

Question 11

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) None of the above
F) B) and D)

Question 12

Which of the following statements is incorrect about shigellosis?

Accepted Answer

A)  Outbreaks have occurred in day care centers.
B)  It frequently complicates to sepsis.
C)  Human carriers cause fecal transmission.
D)  It is also called dysentery.
E)  Symptoms include watery diarrhea with bloody, mucoid stools and abdominal cramps.F) A) and B)
G) D) and E)

Question 13

The most immediate and important treatment needed to prevent death in cholera victims is ______.

Accepted Answer

A)  broad-spectrum antimicrobials
B)  antitoxin
C)  surgery
D)  water and electrolyte replacementE) A) and D)
F) A) and C)

Question 14

The most common infectious disease in humans is ______.

Accepted Answer

A)  dental caries
B)  gastritis
C)  the common cold
D)  pharyngitis
E)  diarrheaF) B) and C)
G) C) and D)

Question 15

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

Accepted Answer

A)  jaundice
B)  cirrhosis
C)  mononucleosis
D)  hepatitisE) A) and B)
F) A) and C)

Question 16

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) A) and E)
G) None of the above

Question 17

The causative organism for mumps is ______.

Accepted Answer

A)  Vibrio cholerae
B)  Corynebacterium diphtheriae
C)  Morbillivirus
D)  Paramyxovirus
E)  Streptococcus pyogenesF) B) and D)
G) C) and D)

Question 18

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 D)
F) A) and C)

Question 19

Enterotoxin production is a characteristic of ______.

Accepted Answer

A)  Clostridium perfringens
B)  Clostridium difficile
C)  Clostridium tetani
D)  Clostridium botulinumE) B) and C)
F) A) and B)

Question 20

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)  The human body is a hostile environment for archaea.
C)  Methanogens are associated with anaerobic regions of the gut and the gingival pockets.
D)  Archaeal infections are treated with translation inhibitors, as their ribosomes are the same as bacterial ribosomes.E) A) and D)
F) B) and C)

Exam 22: Infectious Diseases Affecting the Gastrointestinal Tract

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

Correct AnswerverifiedShow Answer

Symptoms of cryptosporidiosis include

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Carriers of Hepatitis B virus are not common.

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Which of the following statements is incorrect about shigellosis?

Correct AnswerverifiedShow Answer

The most immediate and important treatment needed to prevent death in cholera victims is ______.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following statements regarding tapeworms is incorrect?

Correct AnswerverifiedShow Answer

Most of the bacteria involved in periodontal disease are obligate (strict) anaerobes.Explain why this is the case.

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

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 true of schistosomiasis?

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

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

Correct AnswerverifiedShow Answer

The most common infectious disease in humans is ______.

Correct AnswerverifiedShow Answer

Which of the following statements about parasitic helminths is incorrect?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Oral bacteria on the tooth surface

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Enterotoxin production is a characteristic of ______.

Correct AnswerverifiedShow Answer

The best treatment for acute diarrhea is oral replacement of electrolytes and water.

Correct AnswerverifiedShow Answer

The causative organism for mumps is ______.

Correct AnswerverifiedShow Answer

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