Question 1

Which of the following is directly involved in the initiation of dental caries?

Accepted Answer

A)  dentin 
B)  crevicular fluid 
C)  lysozyme 
D)  sucrose 
E)  lactic acid 
A)  dentin 
B)  crevicular fluid 
C)  lysozyme 
D)  sucrose 
E)  lactic acid

Question 2

A vaccine to provide active immunity to HBV is prepared from

Accepted Answer

A)  viruses grown in embryonated eggs. 
B)  pooled gamma globulin. 
C)  viruses grown in tissue culture. 
D)  viral particles in patients. 
E)  genetically modified yeast. 
A)  viruses grown in embryonated eggs. 
B)  pooled gamma globulin. 
C)  viruses grown in tissue culture. 
D)  viral particles in patients. 
E)  genetically modified yeast.

Question 3

ʺRice water stoolsʺ are characteristic of

Accepted Answer

A)  cholera. 
B)  tapeworm infestation. 
C)  bacillary dysentery. 
D)  salmonellosis. 
E)  amebic dysentery. 
A)  cholera. 
B)  tapeworm infestation. 
C)  bacillary dysentery. 
D)  salmonellosis. 
E)  amebic dysentery.

Question 4

Gastroenteritis due to ingestion of food contaminated with Staphylococcus aureus is due to intoxication by enterotoxins.

Accepted Answer

A) True 
 B)False

Question 5

Which one of the following diseases of the gastrointestinal system is transmitted by the respiratory route?

Accepted Answer

A)  travelerʹs diarrhea 
B)  mumps 
C)  bacillary dysentery 
D)  staphylococcal enterotoxicosis 
E)  Vibrio gastroenteritis 
A)  travelerʹs diarrhea 
B)  mumps 
C)  bacillary dysentery 
D)  staphylococcal enterotoxicosis 
E)  Vibrio gastroenteritis

Question 6

Which of the following is mismatched?

Accepted Answer

A)  chicken  Campylobacter jejuni 
B)  oysters  Vibrio parahaemolyticus 
C)  eggs  Trichinella spiralis 
D)  beef  E. coli O157:H7 
E)  custard and cream pies  Staphylococcus aureus 
A)  chicken  Campylobacter jejuni 
B)  oysters  Vibrio parahaemolyticus 
C)  eggs  Trichinella spiralis 
D)  beef  E. coli O157:H7 
E)  custard and cream pies  Staphylococcus aureus

Question 7

Aflatoxin poisoning is associated with liver cancer.

Accepted Answer

A) True 
 B)False

Question 8

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. 
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.

Question 9

Acute gastroenteritis that occurs after an incubation period of two to three days and commonly affects children is probably caused by

Accepted Answer

A)  rotavirus. 
B)  Staphylococcus aureus. 
C)  Trichinella. 
D)  Salmonella. 
E)  Giardia. 
A)  rotavirus. 
B)  Staphylococcus aureus. 
C)  Trichinella. 
D)  Salmonella. 
E)  Giardia.

Question 10

Thinking of a mumps infection, how do the symptoms involve the GI tract, yet lead to airborne transmission of the disease? Why isnʹt the disease transmitted by fecal -oral contamination instead?

Accepted Answer

The answer of Thinking of a mumps infection, how do...

Question 11

All of the following infections can result from drinking contaminated water EXCEPT

Accepted Answer

A)  Cyclospora infection. 
B)  trichinellosis. 
C)  giardiasis. 
D)  cryptosporidiosis. 
E)  cholera. 
A)  Cyclospora infection. 
B)  trichinellosis. 
C)  giardiasis. 
D)  cryptosporidiosis. 
E)  cholera.

Question 12

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

Question 13

Gums bleeding while brushing oneʹs teeth is most commonly associated with

Accepted Answer

A)  gingivitis. 
B)  cavities. 
C)  periodontitis. 
D)  trench mouth. 
E)  halitosis. 
A)  gingivitis. 
B)  cavities. 
C)  periodontitis. 
D)  trench mouth. 
E)  halitosis.

Question 14

Dental plaque is an example of

Accepted Answer

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

Question 15

Which of the following statements about salmonellosis is FALSE?

Accepted Answer

A)  Severity of disease depends on number of organisms ingested. 
B)  A healthy carrier state exists. 
C)  It is a bacterial infection. 
D)  It is often associated with poultry products. 
E)  The mortality rate is high. 
A)  Severity of disease depends on number of organisms ingested. 
B)  A healthy carrier state exists. 
C)  It is a bacterial infection. 
D)  It is often associated with poultry products. 
E)  The mortality rate is high.

Question 16

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 cereus 
A)  Vibrio vulnificus 
B)  Cyclospora cayetanensis 
C)  Salmonella typhi 
D)  hepatitis C virus 
E)  Bacillus cereus

Question 17

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. 
A)  the respiratory route. 
B)  contaminated food and water. 
C)  unpasteurized milk. 
D)  exposure to contaminated soil. 
E)  biological vectors.

Question 18

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. 
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.

Question 19

Describe the process of periodontal disease.

Accepted Answer

Periodontal disease, also known as gum d

Question 20

Bacterial infections, but not intoxications, can cause diarrhea.

Accepted Answer

A) True 
 B)False

Exam 25: Microbial Diseases of the Digestive System

Which of the following is directly involved in the initiation of dental caries?

A vaccine to provide active immunity to HBV is prepared from

ʺRice water stoolsʺ are characteristic of

Gastroenteritis due to ingestion of food contaminated with Staphylococcus aureus is due to intoxication by enterotoxins.

Which one of the following diseases of the gastrointestinal system is transmitted by the respiratory route?

Which of the following is mismatched?

Aflatoxin poisoning is associated with liver cancer.

Which of the following pertains to typhoid fever?

Acute gastroenteritis that occurs after an incubation period of two to three days and commonly affects children is probably caused by

Thinking of a mumps infection, how do the symptoms involve the GI tract, yet lead to airborne transmission of the disease? Why isnʹt the disease transmitted by fecal -oral contamination instead?

All of the following infections can result from drinking contaminated water EXCEPT

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

Gums bleeding while brushing oneʹs teeth is most commonly associated with

Dental plaque is an example of

Which of the following statements about salmonellosis is FALSE?

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

All of the following pertain to pinworm infections EXCEPT

Describe the process of periodontal disease.

Bacterial infections, but not intoxications, can cause diarrhea.

The Microbial World and You

Chemical Principles

Observing Microorganisms Through a Microscope

Functional Anatomy of Prokaryotic and Eukaryotic Cells

Microbial Metabolism

Microbial Growth

The Control of Microbial Growth

Microbial Genetics

Biotechnology and Dna Technology

Classification of Microorganisms

The Prokaryotes: Domains Bacteria and Archaea

The Eukaryotes: Fungi, Algae, Protozoa, and Helminths

Viruses, Viroids, and Prions

Principles of Disease and Epidemiology

Microbial Mechanisms of Pathogenicity

Innate Immunity: Nonspecific Defenses of the Host

Adaptive Immunity: Specific Defenses of the Host

Practical Applications of Immunology

Disorders Associated With the Immune System

Antimicrobial Drugs

Microbial Diseases of the Skin and Eyes

Microbial Diseases of the Nervous System

Microbial Diseases of the Cardiovascular and Lymphatic Systems

Microbial Diseases of the Respiratory System

Microbial Disease of the Urinary and Reproductive Systems

Environmental Microbiology

Applied and Industrial Microbiology

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