Question 1

The incidence of a disease is the number of new cases of the disease in a population over a specific period of time.

Accepted Answer

A) True 
 B)False  True

Question 2

Neisseria gonorrheae causes disease through:

Accepted Answer

A) latency of some bacterial cells within host tissues 
B) creation of ever-changing VSG glycoproteins 
C) ability to destroy immune defenses in the host 
D) production of exotoxin released from its Gram positive cell wall 
E) production of xylanase,destroying plant conductive tissue 
A) latency of some bacterial cells within host tissues 
B) creation of ever-changing VSG glycoproteins 
C) ability to destroy immune defenses in the host 
D) production of exotoxin released from its Gram positive cell wall 
E) production of xylanase,destroying plant conductive tissue C

Question 3

The measure of the ability of a pathogen to cause severe disease in a host is called _______________.

Accepted Answer

virulence

Question 4

Which of these outcomes is the focus of molecular Koch's postulates?

Accepted Answer

A) The isolation of the pathogen. 
B) The identification of the pathogen. 
C) The determination of the LD₅₀. 
D) The determination of the ID₅₀. 
E) The identification of virulence factor genes. 
A) The isolation of the pathogen. 
B) The identification of the pathogen. 
C) The determination of the LD₅₀. 
D) The determination of the ID₅₀. 
E) The identification of virulence factor genes.

Question 5

Given the knowledge you gave gained regarding the increasing incidence of Lyme disease,when do you think that most cases are likely to occur?

Accepted Answer

A) Winter 
B) Spring 
C) Summer 
D) Fall 
E) Equal incidence throughout the year 
A) Winter 
B) Spring 
C) Summer 
D) Fall 
E) Equal incidence throughout the year

Question 6

All of the following are components that may be used by a pathogen for attachment to a host cell EXCEPT:

Accepted Answer

A) pili. 
B) lipoteichoic acid. 
C) attachment proteins. 
D) chitinases. 
E) surface glycoproteins. 
A) pili. 
B) lipoteichoic acid. 
C) attachment proteins. 
D) chitinases. 
E) surface glycoproteins.

Question 7

Koch's Postulates still play an important role today in identifying the causative agents of emerging diseases.

Accepted Answer

A) True 
 B)False

Question 8

Which of these is true of an endemic disease?

Accepted Answer

A) It quickly appears and then disappears in a population. 
B) It is present in a population at numbers higher than expected. 
C) It is always epidemic on a worldwide scale. 
D) It is constantly present in a given population. 
E) It is spread by an animal vector. 
A) It quickly appears and then disappears in a population. 
B) It is present in a population at numbers higher than expected. 
C) It is always epidemic on a worldwide scale. 
D) It is constantly present in a given population. 
E) It is spread by an animal vector.

Question 9

Term for pathogen properties that aid it in causing disease.

Accepted Answer

A) virulence factors 
B) pathogenics 
C) proteases 
D) enhancers 
E) promoters 
A) virulence factors 
B) pathogenics 
C) proteases 
D) enhancers 
E) promoters

Question 10

Genome comparisons of which strains contribute to the theory that HIV strains may have arisen independently from SIV strains over time?

Accepted Answer

A) HIV-1/SIVsmm,HIV-1/SIVcpz 
B) HIV-2/SIVsmm,HIV-2/SIVcpz 
C) HIV-2/SIVsmm,HIV-1 M/SIVcpz 
D) HIV-2 O/SIVsmm,HIV-1/SIVgorilla 
E) None provide sequence evidence to support this theory 
A) HIV-1/SIVsmm,HIV-1/SIVcpz 
B) HIV-2/SIVsmm,HIV-2/SIVcpz 
C) HIV-2/SIVsmm,HIV-1 M/SIVcpz 
D) HIV-2 O/SIVsmm,HIV-1/SIVgorilla 
E) None provide sequence evidence to support this theory

Question 11

Term for the number of NEW cases of a disease within a population during a specific time period.

Accepted Answer

A) prevalence 
B) incidence 
C) occurrence 
D) infectious dose 50 
E) mortality rate 
A) prevalence 
B) incidence 
C) occurrence 
D) infectious dose 50 
E) mortality rate

Question 12

The replication of a microbial pathogen on or within a host is called a(n)__________________.

Accepted Answer

The answer of The replication of a microbial pathogen on...

Question 13

In the CRISPR-Cas system,which component is responsible for phage destruction?

Accepted Answer

A) Pre-cRNA transcript 
B) cRNA subunits 
C) Cas helicase 
D) Cas nuclease 
E) CRISPR locus 
A) Pre-cRNA transcript 
B) cRNA subunits 
C) Cas helicase 
D) Cas nuclease 
E) CRISPR locus

Question 14

What influenced the decision to halt the Marshall and Warren demonstration that Helicobacter pylori before all of Koch's postulates were satisfied?

Accepted Answer

A) Inoculating humans with pathogens in a deliberate manner was a questionable practice 
B) The unavailability of any cure for the disease 
C) The difficulty culturing the microbe 
D) The fact that stopping at the stage reached had always been the documented approach 
E) Antibiotic resistance of Helicobacter pylori 
A) Inoculating humans with pathogens in a deliberate manner was a questionable practice 
B) The unavailability of any cure for the disease 
C) The difficulty culturing the microbe 
D) The fact that stopping at the stage reached had always been the documented approach 
E) Antibiotic resistance of Helicobacter pylori

Question 15

What is studied in the field of epidemiology?

Accepted Answer

A) Pathology of infectious diseases. 
B) Patterns of infectious disease spread. 
C) The causes of infectious diseases. 
D) The study of spread patterns of all diseases. 
E) The causes of all diseases. 
A) Pathology of infectious diseases. 
B) Patterns of infectious disease spread. 
C) The causes of infectious diseases. 
D) The study of spread patterns of all diseases. 
E) The causes of all diseases.

Question 16

A single mutation in a pathogenic gene may cause the pathogen to become avirulent.

Accepted Answer

A) True 
 B)False

Question 17

The discussion in this section of Shiga toxin's beneficial contribution to the survival of E.coli O157: H7 within its host leads us to speculate that the toxin may be part of a/an:

Accepted Answer

A) Surface receptor complex on the bacterial cell surface 
B) Transcription activating complex 
C) Translation stimulating peptide 
D) DNA polymerase complex 
E) Flagellar antigen complex 
A) Surface receptor complex on the bacterial cell surface 
B) Transcription activating complex 
C) Translation stimulating peptide 
D) DNA polymerase complex 
E) Flagellar antigen complex

Question 18

Polio can be considered as which type(s)of disease: (Select all that apply)

Accepted Answer

A) infectious 
B) communicable 
C) contagious 
D) primary 
E) opportunistic 
A) infectious 
B) communicable 
C) contagious 
D) primary 
E) opportunistic

Question 19

How does vertical transmission of a pathogen occur?

Accepted Answer

A) By an aerosol route. 
B) As a result of an insect bite. 
C) From mother to offspring. 
D) By a sexual route. 
E) By ingesting contaminated water. 
A) By an aerosol route. 
B) As a result of an insect bite. 
C) From mother to offspring. 
D) By a sexual route. 
E) By ingesting contaminated water.

Question 20

Cats suffer(ed)disease caused by the pathogen(s): (Select all that apply)

Accepted Answer

A) MEV 
B) FPLV 
C) CPV 2 
D) CPV2a 
E) CPV2b 
A) MEV 
B) FPLV 
C) CPV 2 
D) CPV2a 
E) CPV2b

Exam 18: Introduction to Infectious Diseases

The incidence of a disease is the number of new cases of the disease in a population over a specific period of time.

Neisseria gonorrheae causes disease through:

The measure of the ability of a pathogen to cause severe disease in a host is called _______________.

Which of these outcomes is the focus of molecular Koch's postulates?

Given the knowledge you gave gained regarding the increasing incidence of Lyme disease,when do you think that most cases are likely to occur?

All of the following are components that may be used by a pathogen for attachment to a host cell EXCEPT:

Koch's Postulates still play an important role today in identifying the causative agents of emerging diseases.

Which of these is true of an endemic disease?

Term for pathogen properties that aid it in causing disease.

Genome comparisons of which strains contribute to the theory that HIV strains may have arisen independently from SIV strains over time?

Term for the number of NEW cases of a disease within a population during a specific time period.

The replication of a microbial pathogen on or within a host is called a(n)__________________.

In the CRISPR-Cas system,which component is responsible for phage destruction?

What influenced the decision to halt the Marshall and Warren demonstration that Helicobacter pylori before all of Koch's postulates were satisfied?

What is studied in the field of epidemiology?

A single mutation in a pathogenic gene may cause the pathogen to become avirulent.

The discussion in this section of Shiga toxin's beneficial contribution to the survival of E.coli O157: H7 within its host leads us to speculate that the toxin may be part of a/an:

Polio can be considered as which type(s)of disease: (Select all that apply)

How does vertical transmission of a pathogen occur?

Cats suffer(ed)disease caused by the pathogen(s): (Select all that apply)

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DNA Replication and Gene Expression

Viral Replication Strategies

Bacterial Genetic Analysis

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The Microbiology of Food and Water

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Virulence Factors and Pathogenic Mechanisms of Bacterial Infections

Viral Pathogenesis

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