Question 1

People who carry and may spread pathogenic organisms without any overt symptoms of illness are called

Accepted Answer

A)  primary infections. 
B)  secondary infections. 
C)  mutualists. 
D)  carriers. 
A)  primary infections. 
B)  secondary infections. 
C)  mutualists. 
D)  carriers.

Question 2

Which of the following may be considered virulence factor(s)?

Accepted Answer

A)  adhesins 
B)  capsules 
C)  endotoxins 
D)  proteases 
E)  All of the choices are correct. 
A)  adhesins 
B)  capsules 
C)  endotoxins 
D)  proteases 
E)  All of the choices are correct.

Question 3

The microorganisms that are occasionally found in or on the body are called

Accepted Answer

A)  abnormal flora. 
B)  transient flora. 
C)  variant flora. 
D)  normal flora. 
A)  abnormal flora. 
B)  transient flora. 
C)  variant flora. 
D)  normal flora.

Question 4

The process by which infectious agents are ingested by host cells is termed

Accepted Answer

A)  exocytosis. 
B)  pinocytosis. 
C)  endocytosis. 
D)  phagosome fusion. 
A)  exocytosis. 
B)  pinocytosis. 
C)  endocytosis. 
D)  phagosome fusion.

Question 5

Which of the following does S. pneumoniae use to survive in the host?

Accepted Answer

A)  plasmids 
B)  pili 
C)  flagella 
D)  capsules 
A)  plasmids 
B)  pili 
C)  flagella 
D)  capsules

Question 6

Obligate intracellular parasites may be grown in special synthetic media.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following members of the normal flora inhibit the growth of Candida albicans?

Accepted Answer

A) E. coli. 
B)  Lactobacillus species. 
C)  Staphylococci species. 
D)  Propionibacterium species. 
A) E. coli. 
B)  Lactobacillus species. 
C)  Staphylococci species. 
D)  Propionibacterium species.

Question 8

A disease is an infection that impairs the normal state of health.

Accepted Answer

A) True 
 B)False

Question 9

Which is/are true of viruses?

Accepted Answer

A)  They may suppress the production of MHC Class I protein. 
B)  They may produce an MHC Class I mimic protein. 
C)  They may prevent cell suicide. 
D)  They may bind to MHC class II antigens. 
E)  They may suppress the production of MHC Class I protein, they may produce an MHC Class I mimic protein AND they may prevent cell suicide. 
A)  They may suppress the production of MHC Class I protein. 
B)  They may produce an MHC Class I mimic protein. 
C)  They may prevent cell suicide. 
D)  They may bind to MHC class II antigens. 
E)  They may suppress the production of MHC Class I protein, they may produce an MHC Class I mimic protein AND they may prevent cell suicide.

Question 10

The number of organisms necessary to insure infection is termed the

Accepted Answer

A)  infectious dose. 
B)  fatal number. 
C)  minimum lethal dose. 
D)  pathogenic number. 
A)  infectious dose. 
B)  fatal number. 
C)  minimum lethal dose. 
D)  pathogenic number.

Question 11

Which of the following causes a foodborne intoxication?

Accepted Answer

A)  Staphylococcus aureus 
B)  E. coli O157:H7 
C)  Clostridium botulinum 
D)  Mycobacterium tuberculosis 
E)  Staphylococcus aureus, E. coli O157:H7 AND Clostridium botulinum 
A)  Staphylococcus aureus 
B)  E. coli O157:H7 
C)  Clostridium botulinum 
D)  Mycobacterium tuberculosis 
E)  Staphylococcus aureus, E. coli O157:H7 AND Clostridium botulinum

Question 12

The connection between a particular organism and a specific disease was first made by

Accepted Answer

A)  Fracastorius. 
B)  Pasteur. 
C)  Koch. 
D)  Leeuwenhoek. 
A)  Fracastorius. 
B)  Pasteur. 
C)  Koch. 
D)  Leeuwenhoek.

Question 13

The chemical nature of endotoxins is that of a

Accepted Answer

A)  protein. 
B)  nucleic acid. 
C)  lipid. 
D)  lipopolysaccharide. 
A)  protein. 
B)  nucleic acid. 
C)  lipid. 
D)  lipopolysaccharide.

Question 14

The symbiotic relationship wherein both partners benefit is termed

Accepted Answer

A)  commensalism. 
B)  parasitism. 
C)  independence. 
D)  mutualism. 
A)  commensalism. 
B)  parasitism. 
C)  independence. 
D)  mutualism.

Question 15

A strong attachment of a microorganism to a host cell automatically leads to disease.

Accepted Answer

A) True 
 B)False

Question 16

The first step in the establishment of infection is that the organism must

Accepted Answer

A)  invade host tissues. 
B)  attach to host cells. 
C)  evade phagocytes. 
D)  produce toxins. 
A)  invade host tissues. 
B)  attach to host cells. 
C)  evade phagocytes. 
D)  produce toxins.

Question 17

Bacteria that resist killing by complement proteins are termed

Accepted Answer

A)  carriers. 
B)  serum resistant. 
C)  balanced pathogens. 
D)  mutualistic. 
E)  carriers AND serum resistant. 
A)  carriers. 
B)  serum resistant. 
C)  balanced pathogens. 
D)  mutualistic. 
E)  carriers AND serum resistant.

Question 18

If a disease affects only a human and not an animal, then it would be difficult to fulfill Koch's postulate number

Accepted Answer

A)  1. 
B)  2. 
C)  3. 
D)  4. 
A)  1. 
B)  2. 
C)  3. 
D)  4.

Question 19

High concentrations of some bacteria are necessary for successful invasion because only at high density are their virulence genes expressed.

Accepted Answer

A) True 
 B)False

Question 20

A more modern equivalent to Koch's Postulates is termed

Accepted Answer

A)  Pasteur's Systematics. 
B)  Hoch's Postulates. 
C)  Atomic Theory. 
D)  Protein Theory. 
E)  Molecular Postulates. 
A)  Pasteur's Systematics. 
B)  Hoch's Postulates. 
C)  Atomic Theory. 
D)  Protein Theory. 
E)  Molecular Postulates.

Exam 16: Host-Microbe Interactions

People who carry and may spread pathogenic organisms without any overt symptoms of illness are called

Which of the following may be considered virulence factor(s)?

The microorganisms that are occasionally found in or on the body are called

The process by which infectious agents are ingested by host cells is termed

Which of the following does S. pneumoniae use to survive in the host?

Obligate intracellular parasites may be grown in special synthetic media.

Which of the following members of the normal flora inhibit the growth of Candida albicans?

A disease is an infection that impairs the normal state of health.

Which is/are true of viruses?

The number of organisms necessary to insure infection is termed the

Which of the following causes a foodborne intoxication?

The connection between a particular organism and a specific disease was first made by

The chemical nature of endotoxins is that of a

The symbiotic relationship wherein both partners benefit is termed

A strong attachment of a microorganism to a host cell automatically leads to disease.

The first step in the establishment of infection is that the organism must

Bacteria that resist killing by complement proteins are termed

If a disease affects only a human and not an animal, then it would be difficult to fulfill Koch's postulate number

High concentrations of some bacteria are necessary for successful invasion because only at high density are their virulence genes expressed.

A more modern equivalent to Koch's Postulates is termed

Humans and the Microbial World

The Molecules of Life

Microscopy and Cell Structure

Dynamics of Prokaryotic Growth

Control of Microbial Growth

Metabolism: Fueling Cell Growth

The Blueprint of Life, From Dna to Protein

Bacterial Genetics

Biotechnology and Recombinant Dna

Identification and Classification of Prokaryotes

The Diversity of Prokaryotic Organisms

The Eukaryotic Members of the Microbial World

Viruses, Viroids and Prions

The Innate Immune Response

The Adaptive Immune Response

Immunologic Disorders

Applications of Immune Responses

Epidemiology

Antimicrobial Medications

Respiratory System Infections

Skin Infections

Wound Infections

Digestive System Infections

Genitourinary Infections

Nervous System Infections

Blood and Lymphatic Infections

Hiv Disease and Complications of Immunodeficiency

Microbial Ecology

Environmental Microbiology: Treatment of Water, Wastes, and Polluted Habitats

Food Microbiology

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