Question 1

Disease- causing exotoxins are produced by all of the following organisms EXCEPT

Accepted Answer

A)  Clostridium botulinum 
B)  Staphylococcus aureus 
C)  Shigella dysenteriae 
D)  Vibrio cholerae 
E)  Clostridium perfringens 
A)  Clostridium botulinum 
B)  Staphylococcus aureus 
C)  Shigella dysenteriae 
D)  Vibrio cholerae 
E)  Clostridium perfringens

Question 2

The digestive tract is essentially one long tube. The order of the structures, beginning with the mouth, is

Accepted Answer

A)  pharynx, esophagus, stomach, small intestine, large intestine. 
B)  esophagus, stomach, pharynx, small intestine, large intestine. 
C)  esophagus, pharynx, stomach, small intestine, large intestine. 
D)  pharynx, stomach, esophagus, small intestine, large intestine. 
E)  pharynx, esophagus, stomach, large intestine, small intestine. 
A)  pharynx, esophagus, stomach, small intestine, large intestine. 
B)  esophagus, stomach, pharynx, small intestine, large intestine. 
C)  esophagus, pharynx, stomach, small intestine, large intestine. 
D)  pharynx, stomach, esophagus, small intestine, large intestine. 
E)  pharynx, esophagus, stomach, large intestine, small intestine.

Question 3

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

Accepted Answer

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

Question 4

EHEC is a major cause of diarrhea in developing countries and may result in the death of small children.

Accepted Answer

A) True 
 B)False

Question 5

Helicobacter pylori can grow in the stomach because it

Accepted Answer

A)  hides in macrophages. 
B)  possesses an enzyme that neutralizes HCl. 
C)  invades epithelial cells. 
D)  makes HCl. 
E)  makes a capsule. 
A)  hides in macrophages. 
B)  possesses an enzyme that neutralizes HCl. 
C)  invades epithelial cells. 
D)  makes HCl. 
E)  makes a capsule.

Question 6

In Situation 25.1, fecal samples should be cultured for all of the following EXCEPT

Accepted Answer

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

Question 7

A vaccine to provide active immunity to HBV is prepared from

Accepted Answer

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

Question 8

In Situation 25.1, fecal samples were found to be negative when cultured. The next step in diagnosing the cause of illness would be

Accepted Answer

A)  to begin antibiotic therapy. 
B)  muscle biopsy. 
C)  blood cultures. 
D)  microscopic examination of fecess for oocysts. 
E)  microscopic examination of feces for viruses. 
A)  to begin antibiotic therapy. 
B)  muscle biopsy. 
C)  blood cultures. 
D)  microscopic examination of fecess for oocysts. 
E)  microscopic examination of feces for viruses.

Question 9

Clostridium difficile- associated diarrhea is usually preceded by

Accepted Answer

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

Question 10

Which of the following is included in GALT?

Accepted Answer

A)  salivary glands 
B)  liver 
C)  thymus 
D)  Peyer's patches 
E)  tonsils 
A)  salivary glands 
B)  liver 
C)  thymus 
D)  Peyer's patches 
E)  tonsils

Question 11

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

Accepted Answer

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

Question 12

Approximately 30 percent of the body's immune system is located in the intestinal tract.

Accepted Answer

A) True 
 B)False

Question 13

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

Accepted Answer

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

Question 14

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

Accepted Answer

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

Question 15

Which of the following statements about staphylococcal food poisoning is FALSE?

Accepted Answer

A)  It can be prevented by heating foods to 50°C for 15 minutes. 
B)  It can be prevented by adequate refrigeration of food. 
C)  It is treated by replacing water and electrolytes. 
D)  It is caused by ingesting an enterotoxin. 
E)  It is characterized by rapid onset and short duration of symptoms. 
A)  It can be prevented by heating foods to 50°C for 15 minutes. 
B)  It can be prevented by adequate refrigeration of food. 
C)  It is treated by replacing water and electrolytes. 
D)  It is caused by ingesting an enterotoxin. 
E)  It is characterized by rapid onset and short duration of symptoms.

Question 16

Which of the following statements about salmonellosis is FALSE?

Accepted Answer

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

Question 17

In humans, beef tapeworm infestations are acquired by ingesting

Accepted Answer

A)  water contaminated with Diphyllobothrium latum eggs. 
B)  cystycerci of Taenia saginata in undercooked meat. 
C)  cystycerci of Taenia solium in undercooked meat. 
D)  the eggs of Taenia saginata. 
E)  segments of Taenia solium tapeworms. 
A)  water contaminated with Diphyllobothrium latum eggs. 
B)  cystycerci of Taenia saginata in undercooked meat. 
C)  cystycerci of Taenia solium in undercooked meat. 
D)  the eggs of Taenia saginata. 
E)  segments of Taenia solium tapeworms.

Question 18

Mary made her family's favorite cream of broccoli soup for lunch. Lunch was forgotten when her son suddenly remembered he had a soccer game at noon. The family finally returned several hours later and sat down to eat. Although Mary reheated the soup (which had been left out at room temperature while they were gone), why is this no guarantee that Mary and her family will not become sick due to food poisoning?

Accepted Answer

Reheating the soup does not guarantee th

Question 19

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

Accepted Answer

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

Question 20

Aflatoxin is a(n) _ associated with ingestion of contaminated .

Accepted Answer

A)  mycotoxin; peanuts 
B)  endotoxin; peanuts 
C)  enterotoxin; rye or other cereal grains 
D)  mycotoxin; rye or other cereal grains 
E)  enterotoxin; peanuts 
A)  mycotoxin; peanuts 
B)  endotoxin; peanuts 
C)  enterotoxin; rye or other cereal grains 
D)  mycotoxin; rye or other cereal grains 
E)  enterotoxin; peanuts

Exam 25: Microbial Diseases of the Digestive System

Disease- causing exotoxins are produced by all of the following organisms EXCEPT

The digestive tract is essentially one long tube. The order of the structures, beginning with the mouth, is

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

EHEC is a major cause of diarrhea in developing countries and may result in the death of small children.

Helicobacter pylori can grow in the stomach because it

In Situation 25.1, fecal samples should be cultured for all of the following EXCEPT

A vaccine to provide active immunity to HBV is prepared from

In Situation 25.1, fecal samples were found to be negative when cultured. The next step in diagnosing the cause of illness would be

Clostridium difficile- associated diarrhea is usually preceded by

Which of the following is included in GALT?

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

Approximately 30 percent of the body's immune system is located in the intestinal tract.

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

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

Which of the following statements about staphylococcal food poisoning is FALSE?

Which of the following statements about salmonellosis is FALSE?

In humans, beef tapeworm infestations are acquired by ingesting

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

Aflatoxin is a(n) _ associated with ingestion of contaminated .

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 Recombinant Dna

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 Diseases of the Urinary and Reproductive Systems

Environmental Microbiology

Applied and Industrial Microbiology

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