Question 1

Which of the following organisms is likely to be transmitted via undercooked pork and horse?

Accepted Answer

A)  Shigella spp. 
B)  Staphylococcus aureus 
C)  Salmonella enterica 
D)  Trichinella spiralis 
E)  Entamoeba histolytica 
A)  Shigella spp. 
B)  Staphylococcus aureus 
C)  Salmonella enterica 
D)  Trichinella spiralis 
E)  Entamoeba histolytica

Question 2

Table 25.1 $$\begin{array} { | l | l | } 
\hline { \text { Food } } & \text { Relative Risk } \
\hline \text { Black beans } & 0.58 \
\hline \text { Corn soup } & 0.75 \
\hline \text { Talapeño peppers } & 34.13 \
\hline \text { Roma tomatoes } & 5.40 \
\hline
\end{array}$$ The relative risks shown in Table 25.1 were calculated for foods suspected of transmitting Salmonella. Which food is the most likely source of infection?

Accepted Answer

A)  jalapeño peppers 
B)  black beans 
C)  corn soup 
D)  roma tomatoes 
E)  The answer cannot be determined based on the information provided. 
A)  jalapeño peppers 
B)  black beans 
C)  corn soup 
D)  roma tomatoes 
E)  The answer cannot be determined based on the information provided.

Question 3

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 4

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

Accepted Answer

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

Question 5

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

Accepted Answer

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

Question 6

Which of the following causes inflammation of the liver?

Accepted Answer

A)  hepatitis A virus 
B)  Salmonella enterica 
C)  Escherichia coli 
D)  Shigella spp. 
E)  Vibrio cholerae 
A)  hepatitis A virus 
B)  Salmonella enterica 
C)  Escherichia coli 
D)  Shigella spp. 
E)  Vibrio cholerae

Question 7

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 8

An outbreak of viral gastroenteritis occurs in a pediatrics ward. Rotavirus is the most likely causative agent.

Accepted Answer

A) True 
 B)False

Question 9

Which of the following organisms feeds on red blood cells?

Accepted Answer

A)  Giardia lamblia 
B)  Taenia spp. 
C)  Escherichia coli 
D)  Entamoeba histolytica 
E)  Vibrio parahaemolyticus 
A)  Giardia lamblia 
B)  Taenia spp. 
C)  Escherichia coli 
D)  Entamoeba histolytica 
E)  Vibrio parahaemolyticus

Question 10

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 11

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

Accepted Answer

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

Question 12

Clostridium difficile-associated diarrhea is usually preceded by

Accepted Answer

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

Question 13

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 14

Multiple pathovars of E. coli are well characterized. Identify four different pathogenic strains and discuss the mechanism of disease for each.

Accepted Answer

1. Enterotoxigenic E. coli (ETEC): ETEC

Question 15

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 16

Which of the following is included in GALT?

Accepted Answer

A)  liver 
B)  salivary glands 
C)  thymus 
D)  tonsils 
E)  Peyerʹs patches 
A)  liver 
B)  salivary glands 
C)  thymus 
D)  tonsils 
E)  Peyerʹs patches

Question 17

Which of the following is mismatched?

Accepted Answer

A)  pinworm infestation  humans ingest parasiteʹs eggs 
B)  hydatid disease  humans are the definitive host 
C)  trichinellosis  humans eat larva of parasite 
D)  Taenia infestation  humans are the definitive host 
E)  hookworm infestation  parasite bores through skin 
A)  pinworm infestation  humans ingest parasiteʹs eggs 
B)  hydatid disease  humans are the definitive host 
C)  trichinellosis  humans eat larva of parasite 
D)  Taenia infestation  humans are the definitive host 
E)  hookworm infestation  parasite bores through skin

Question 18

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

Accepted Answer

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

Question 19

Typhoid fever differs from salmonellosis in that in typhoid fever

Accepted Answer

A)  the incubation period is much longer. 
B)  the microorganisms multiply within macrophages. 
C)  the symptoms are due to infection of the gallbladder. 
D)  infection occurs due to ingestion of endospores. 
E)  infection is spread only in the feces of domesticated animals. 
A)  the incubation period is much longer. 
B)  the microorganisms multiply within macrophages. 
C)  the symptoms are due to infection of the gallbladder. 
D)  infection occurs due to ingestion of endospores. 
E)  infection is spread only in the feces of domesticated animals.

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 25: Microbial Diseases of the Digestive System

Which of the following organisms is likely to be transmitted via undercooked pork and horse?

Table 25.1 Food Relative Risk Black beans 0.58 Corn soup 0.75 Talapeo peppers 34.13 Roma tomatoes 5.40 The relative risks shown in Table 25.1 were calculated for foods suspected of transmitting Salmonella. Which food is the most likely source of infection?

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

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

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

Which of the following causes inflammation of the liver?

Helicobacter pylori can grow in the stomach because it

An outbreak of viral gastroenteritis occurs in a pediatrics ward. Rotavirus is the most likely causative agent.

Which of the following organisms feeds on red blood cells?

Many bacterial infections of the lower digestive tract are treated with

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

Clostridium difficile-associated diarrhea is usually preceded by

Poultry products are a likely source of infection by

Multiple pathovars of E. coli are well characterized. Identify four different pathogenic strains and discuss the mechanism of disease for each.

What is a Dane particle?

Which of the following is included in GALT?

Which of the following is mismatched?

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

Typhoid fever differs from salmonellosis in that in typhoid fever

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

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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