Question 1

Many bacterial infections of the lower digestive tract are treated with

Accepted Answer

A)  water and electrolytes. 
B)  antitoxin. 
C)  thorough cooking. 
D)  quinacrine. 
E)  penicillin. 
A)  water and electrolytes. 
B)  antitoxin. 
C)  thorough cooking. 
D)  quinacrine. 
E)  penicillin.

Question 2

Which of the following is mismatched?

Accepted Answer

A)  shiga toxin - tissue destruction 
B)  Vibrio enterotoxin - secretion of Cl-, K+, and H₂O 
C)  aflatoxin - liver cancer 
D)  ergot - gangrene 
E)  Salmonella endotoxin - lyses red blood cells 
A)  shiga toxin - tissue destruction 
B)  Vibrio enterotoxin - secretion of Cl-, K+, and H₂O 
C)  aflatoxin - liver cancer 
D)  ergot - gangrene 
E)  Salmonella endotoxin - lyses red blood cells

Question 3

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 4

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 5

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

Accepted Answer

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

Question 6

What is a Dane particle?

Accepted Answer

A)  the chlorine-resistant virus that causes HAV 
B)  the infectious virion that causes HBV 
C)  the filamentous particles that cause HAV 
D)  another name for an HBV surface antigen 
E)  the spherical particles found in serum of patients with HBV 
A)  the chlorine-resistant virus that causes HAV 
B)  the infectious virion that causes HBV 
C)  the filamentous particles that cause HAV 
D)  another name for an HBV surface antigen 
E)  the spherical particles found in serum of patients with HBV

Question 7

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 8

Approximately 30 percent of the bodyʹs immune system is located in the intestinal tract.

Accepted Answer

A) True 
 B)False

Question 9

All of the following are gram-negative rods that cause gastroenteritis EXCEPT

Accepted Answer

A)  Clostridium perfringens. 
B)  Yersinia enterocolitica. 
C)  Escherichia coli. 
D)  Shigella spp. 
E)  Salmonella typhi. 
A)  Clostridium perfringens. 
B)  Yersinia enterocolitica. 
C)  Escherichia coli. 
D)  Shigella spp. 
E)  Salmonella typhi.

Question 10

Dental caries can also be referred to as periodontal disease.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following helminthic diseases is a common infestation found in the southeastern United States?

Accepted Answer

A)  Taenia saginata 
B)  Trichuris trichiura 
C)  Echinococcus granulosus 
D)  Ascaris lumbricoides 
E)  Enterobius vermicularis 
A)  Taenia saginata 
B)  Trichuris trichiura 
C)  Echinococcus granulosus 
D)  Ascaris lumbricoides 
E)  Enterobius vermicularis

Question 12

Lactic acid, an end product of fructose fermentation, causes breakdown of tooth enamel and, eventually, cavities.

Accepted Answer

A) True 
 B)False

Question 13

Helicobacter pylori can grow in the stomach because it

Accepted Answer

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

Question 14

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 15

Aflatoxin poisoning is associated with liver cancer.

Accepted Answer

A) True 
 B)False

Question 16

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 17

Poultry products are a likely source of infection by

Accepted Answer

A)  Clostridium perfringens. 
B)  Salmonella enterica. 
C)  Vibrio cholerae. 
D)  Helicobacter pylori. 
E)  Shigella spp. 
A)  Clostridium perfringens. 
B)  Salmonella enterica. 
C)  Vibrio cholerae. 
D)  Helicobacter pylori. 
E)  Shigella spp.

Question 18

Which of the following correctly lists the stages of tooth decay?

Accepted Answer

A)  plaque accumulation, destruction of enamel, advancement of decay through enamel, decay in dentin, decay in tooth pulp 
B)  destruction of enamel, advancement of decay through enamel, plaque accumulation, decay in dentin, decay in tooth pulp 
C)  decay in dentin, plaque accumulation, destruction of enamel, advancement of decay through enamel, decay in tooth pulp 
D)  plaque accumulation, destruction of enamel, decay in tooth pulp, advancement of decay through enamel, decay in dentin 
E)  destruction of enamel, plaque accumulation, advancement of decay through enamel, decay in dentin, decay in tooth pulp 
A)  plaque accumulation, destruction of enamel, advancement of decay through enamel, decay in dentin, decay in tooth pulp 
B)  destruction of enamel, advancement of decay through enamel, plaque accumulation, decay in dentin, decay in tooth pulp 
C)  decay in dentin, plaque accumulation, destruction of enamel, advancement of decay through enamel, decay in tooth pulp 
D)  plaque accumulation, destruction of enamel, decay in tooth pulp, advancement of decay through enamel, decay in dentin 
E)  destruction of enamel, plaque accumulation, advancement of decay through enamel, decay in dentin, decay in tooth pulp

Question 19

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 20

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.

Exam 25: Microbial Diseases of the Digestive System

Many bacterial infections of the lower digestive tract are treated with

Which of the following is mismatched?

A vaccine to provide active immunity to HBV is prepared from

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

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

What is a Dane particle?

ʺRice water stoolsʺ are characteristic of

Approximately 30 percent of the bodyʹs immune system is located in the intestinal tract.

All of the following are gram-negative rods that cause gastroenteritis EXCEPT

Dental caries can also be referred to as periodontal disease.

Which of the following helminthic diseases is a common infestation found in the southeastern United States?

Lactic acid, an end product of fructose fermentation, causes breakdown of tooth enamel and, eventually, cavities.

Helicobacter pylori can grow in the stomach because it

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

Aflatoxin poisoning is associated with liver cancer.

Which of the following statements about salmonellosis is FALSE?

Poultry products are a likely source of infection by

Which of the following correctly lists the stages of tooth decay?

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

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

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

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

Innate Immunity: Nonspecific Defenses of the Host

Filters