Question 1

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

Accepted Answer

A) liver 
B) salivary glands 
C) pancreas 
D) large intestine 
E) small intestine 
A) liver 
B) salivary glands 
C) pancreas 
D) large intestine 
E) small intestine D

Question 2

Escherichia coli infections

Accepted Answer

A) All of the choices are correct. 
B) are often transmitted by fecal contaminated water and food. 
C) involve enterotoxin in traveler's diarrhea. 
D) include EIEC that destroys gut mucosa. 
E) are self-limiting with the only treatment being rehydration. 
A) All of the choices are correct. 
B) are often transmitted by fecal contaminated water and food. 
C) involve enterotoxin in traveler's diarrhea. 
D) include EIEC that destroys gut mucosa. 
E) are self-limiting with the only treatment being rehydration. A

Question 3

The only body fluid that can transmit Hepatitis B virus is blood.

Accepted Answer

A) True 
 B)False  False

Question 4

All of the following are characteristics of Campylobacter jejuni except

Accepted Answer

A) transmitted through ingestion of contaminated chicken,meat,milk,and water. 
B) causes fever and a watery to bloody diarrhea. 
C) infects the stomach. 
D) produces an enterotoxin that stimulates diarrhea. 
E) are gram-negative,curved rods with darting motility. 
A) transmitted through ingestion of contaminated chicken,meat,milk,and water. 
B) causes fever and a watery to bloody diarrhea. 
C) infects the stomach. 
D) produces an enterotoxin that stimulates diarrhea. 
E) are gram-negative,curved rods with darting motility.

Question 5

Which of the following is not true of enterotoxigenic E.coli (ETEC)?

Accepted Answer

A) causes traveler's diarrhea 
B) has an A-B,heat labile exotoxin 
C) has heat-stable exotoxins 
D) causes a high fever 
A) causes traveler's diarrhea 
B) has an A-B,heat labile exotoxin 
C) has heat-stable exotoxins 
D) causes a high fever

Question 6

Parasitic helminths exhibit all of the following characteristics except

Accepted Answer

A) are multicellular animals. 
B) have a definitive host where the adult form lives. 
C) have larval forms that do not affect humans. 
D) include roundworms. 
E) include tapeworms. 
A) are multicellular animals. 
B) have a definitive host where the adult form lives. 
C) have larval forms that do not affect humans. 
D) include roundworms. 
E) include tapeworms.

Question 7

Which is mismatched?

Accepted Answer

A) hepatitis A virus - nonenveloped,single-stranded RNA enterovirus 
B) hepatitis B virus - enveloped DNA virus 
C) hepatitis C virus - RNA virus 
D) hepatitis D virus - defective RNA virus that coinfects with HAV 
E) hepatitis E virus - self-limiting RNA virus 
A) hepatitis A virus - nonenveloped,single-stranded RNA enterovirus 
B) hepatitis B virus - enveloped DNA virus 
C) hepatitis C virus - RNA virus 
D) hepatitis D virus - defective RNA virus that coinfects with HAV 
E) hepatitis E virus - self-limiting RNA virus

Question 8

Which of the following is not a normal causative agent of acute diarrhea with vomiting (food poisoning)?

Accepted Answer

A) Clostridium perfringens 
B) Staphylococcus aureus exotoxin 
C) Clostridium difficile 
D) Bacillus cereus 
A) Clostridium perfringens 
B) Staphylococcus aureus exotoxin 
C) Clostridium difficile 
D) Bacillus cereus

Question 9

Gingivitis

Accepted Answer

A) is primarily caused by normal anaerobic biota. 
B) involves the formation of calculus and plaque. 
C) involves a crevice in the gum along the tooth. 
D) may involve archaeal species. 
E) All of the choices are correct. 
A) is primarily caused by normal anaerobic biota. 
B) involves the formation of calculus and plaque. 
C) involves a crevice in the gum along the tooth. 
D) may involve archaeal species. 
E) All of the choices are correct.

Question 10

Which of the following is not true of enterovasive E.coli (EIEC)?

Accepted Answer

A) produces shiga toxin 
B) invades gut mucosa 
C) blood and pus in the stool 
D) no heat-labile or heat-stable exotoxins 
A) produces shiga toxin 
B) invades gut mucosa 
C) blood and pus in the stool 
D) no heat-labile or heat-stable exotoxins

Question 11

Which of the following helminths is paired with a correct characteristic of its pathogenesis?

Accepted Answer

A) Ascaris lumbricoides - enters through the skin 
B) Necator americanus - eggs are ingested 
C) Enterobius vermicularis - sexual transmission 
D) Taenia solium - eggs or larvae can be ingested 
E) Schistomoma species - carried by an insect vector into human 
A) Ascaris lumbricoides - enters through the skin 
B) Necator americanus - eggs are ingested 
C) Enterobius vermicularis - sexual transmission 
D) Taenia solium - eggs or larvae can be ingested 
E) Schistomoma species - carried by an insect vector into human

Question 12

Even as late as the1980s,the medical establishment thought that ulcers were caused by stress and the increase in gastricity acidity.How has the current understanding of ulcer development changed patient treatment,compared to treatments before 1980?

Accepted Answer

A) Antibiotics are now used to treat ulcers. 
B) Doctors now give their patients sedatives to calm patients with ulcers. 
C) There is no treatment for ulcers,then or now. 
D) Different foods are now suggested for patients having ulcers. 
A) Antibiotics are now used to treat ulcers. 
B) Doctors now give their patients sedatives to calm patients with ulcers. 
C) There is no treatment for ulcers,then or now. 
D) Different foods are now suggested for patients having ulcers.

Question 13

Having just returned from a vacation in South America,you find that you now have a severe diarrheal illness.Your symptoms,other than diarrhea,are pain,cramps,some fecal blood,and fever.These are symptoms of many of the gastrointestinal diseases,so that information does not help you or the doctors identify the infectious agent.Your doctor wants to send a sample of your feces down to the microbiology lab for them to look at it under the light microscope.Based upon this protocol selection,the physician believes that have:

Accepted Answer

A) cholera 
B) salmonellosis 
C) hepatitis A 
D) amoebiasis 
E) rotavirus 
A) cholera 
B) salmonellosis 
C) hepatitis A 
D) amoebiasis 
E) rotavirus

Question 14

Which of the following is not a virulence factor of E.coli O157:H7?

Accepted Answer

A) secretes shiga exotoxin from a bacteriophage 
B) secretes shiga exotoxin from the 
C) protein called intimin for host attachment 
D) type III secretion system 
E) provides the receptor for intimin to attach to the host 
A) secretes shiga exotoxin from a bacteriophage 
B) secretes shiga exotoxin from the 
C) protein called intimin for host attachment 
D) type III secretion system 
E) provides the receptor for intimin to attach to the host

Question 15

A common food intoxication is caused by enterotoxin-producing strains of

Accepted Answer

A) Staphylococcus aureus. 
B) Staphylococcus epidermidis. 
C) Staphylococcus saprophyticus. 
D) Streptococcus pyogenes. 
E) Streptococcus agalactiae. 
A) Staphylococcus aureus. 
B) Staphylococcus epidermidis. 
C) Staphylococcus saprophyticus. 
D) Streptococcus pyogenes. 
E) Streptococcus agalactiae.

Question 16

Carriers of Hepatitis B virus are not common.

Accepted Answer

A) True 
 B)False

Question 17

All of the following pertain to Clostridium difficile infection except it

Accepted Answer

A) is due to ingestion of contaminated,improperly stored,cooked meats and gravies. 
B) is a colitis that is a superinfection. 
C) often has an endogenous source. 
D) is associated with disruption of normal flora due to broad-spectrum antimicrobials. 
E) is the major cause of diarrhea in hospitals. 
A) is due to ingestion of contaminated,improperly stored,cooked meats and gravies. 
B) is a colitis that is a superinfection. 
C) often has an endogenous source. 
D) is associated with disruption of normal flora due to broad-spectrum antimicrobials. 
E) is the major cause of diarrhea in hospitals.

Question 18

Which is incorrect about Staphylococcus aureus food intoxication?

Accepted Answer

A) Food gets contaminated by a human carrier. 
B) Common associated foods include custards,ham,cream pastries,and processed meats. 
C) Food is left unrefrigerated for several hours after contamination. 
D) Ingestion of the pathogen allows it to multiply and damage the GI tract lining. 
E) Symptoms come on quickly and include nausea,vomiting,and diarrhea. 
A) Food gets contaminated by a human carrier. 
B) Common associated foods include custards,ham,cream pastries,and processed meats. 
C) Food is left unrefrigerated for several hours after contamination. 
D) Ingestion of the pathogen allows it to multiply and damage the GI tract lining. 
E) Symptoms come on quickly and include nausea,vomiting,and diarrhea.

Question 19

Cholera symptoms are

Accepted Answer

A) copious watery diarrhea. 
B) loss of blood volume. 
C) acidosis,sunken eyes,and thirst. 
D) hypotension,tachycardia,and shock. 
E) All of the choices are correct. 
A) copious watery diarrhea. 
B) loss of blood volume. 
C) acidosis,sunken eyes,and thirst. 
D) hypotension,tachycardia,and shock. 
E) All of the choices are correct.

Question 20

Liver flukes live in all of the following areas except the

Accepted Answer

A) small intestine. 
B) liver. 
C) gallbladder. 
D) bile duct. 
A) small intestine. 
B) liver. 
C) gallbladder. 
D) bile duct.

Exam 22: Infectious Diseases Affecting the Gastrointestinal Tract

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

Escherichia coli infections

The only body fluid that can transmit Hepatitis B virus is blood.

All of the following are characteristics of Campylobacter jejuni except

Which of the following is not true of enterotoxigenic E.coli (ETEC)?

Parasitic helminths exhibit all of the following characteristics except

Which is mismatched?

Which of the following is not a normal causative agent of acute diarrhea with vomiting (food poisoning)?

Gingivitis

Which of the following is not true of enterovasive E.coli (EIEC)?

Which of the following helminths is paired with a correct characteristic of its pathogenesis?

Even as late as the1980s,the medical establishment thought that ulcers were caused by stress and the increase in gastricity acidity.How has the current understanding of ulcer development changed patient treatment,compared to treatments before 1980?

Which of the following is not a virulence factor of E.coli O157:H7?

A common food intoxication is caused by enterotoxin-producing strains of

Carriers of Hepatitis B virus are not common.

All of the following pertain to Clostridium difficile infection except it

Which is incorrect about Staphylococcus aureus food intoxication?

Cholera symptoms are

Liver flukes live in all of the following areas except the

The Main Themes of Microbiology

The Chemistry of Biology

Tools of the Laboratory: Methods for the Culturing of Microscopic Analysis of Microorganisms

Prokaryotic Profiles: The Bacteria and Archaea

Eukaryotic Cells and Microorganisms

An Introduction to the Viruses

Microbial Nutrition, Ecology, and Growth

Microbial Metabolism: the Chemical Crossroads of Life

Microbial Genetics

Genetic Engineering and Recombinant Dna

Physical and Chemical Control of Microbes

Drugs, Microbes, host-The Elements of Chemotherapy

Microbe-Human Interactions: Infection and Disease

Host Defenses I: Overview and Nonspecific Defenses

Host Defenses II: Specific Immunity and Immunization

Disorders in Immunity

Diagnosing Infections

Infectious Diseases Affecting the Skin and Eyes

Infectious Diseases Affecting the Nervous System

Infectious Diseases Affecting the Cardiovascular and Lymphatic Systems

Infectious Diseases Affecting the Respiratory System

Infectious Diseases Affecting the Genitourinary System

Microbes and the Environment

Applied Microbiology and Food and Water Safety

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