Question 1

Carriers that shed and transmit pathogens while they are recovering from an infectious disease are called ______ carriers.

Accepted Answer

A)  asymptomatic
B)  passive
C)  incubation
D)  chronic
E)  convalescentF) A) and B)
G) D) and E)

Question 2

The number of persons afflicted with an infectious disease is the _____ rate.

Accepted Answer

A)   morbidity
B)   mortality
C)   incidence
D)   endemic
E)   pandemicF) A) and B)
G) B) and D)

Question 3

Lipopolysaccharide of the outer membrane of gram-negative cell walls is called ______.

Accepted Answer

A)   exotoxin
B)   endotoxin
C)   enterotoxin
D)   leukocidin
E)   hemolysinF) A) and E)
G) None of the above

Question 4

Which genus is the most common resident biota of mouth surfaces?

Accepted Answer

A)   Lactobacillus
B)   Streptococcus
C)   Haemophilus
D)   Escherichia
E)   MycobacteriumF) A) and B)
G) A) and C)

Question 5

The Centers for Disease Control and Prevention assigns the most virulent microbes known to cause human disease to biosafety level 4.

Accepted Answer

A) True 
 B)False

Question 6

Infections that go unnoticed because there are no symptoms are called ______.

Accepted Answer

A)   syndromes
B)   malaise
C)   inflammation
D)   asymptomatic
E)   secondary infectionsF) C) and D)
G) A) and B)

Question 7

An intermediary inanimate object from which an infectious agent is acquired is termed a ______.

Accepted Answer

A)   fomite
B)   carrier
C)   vector
D)   reservoirE) C) and D)
F) A) and B)

Question 8

In the movie "Contagion",one person who has become infected with a recombinant pathogenic virus spreads it to a large number of people with whom she comes into contact.Those people then spread it to others,and,before you know it,the disease has spread all over the world.This is an example of a _______ epidemic.

Accepted Answer

A)   point-source
B)   common-source
C)   propagated
D)   endemicE) All of the above
F) A) and B)

Question 9

Normal biota includes each of the following except ______.

Accepted Answer

A)   bacteria
B)   fungi
C)   protozoans
D)   viruses
E)   All of the choices are correct.F) B) and E)
G) B) and D)

Question 10

Which of the following is not a factor that weakens host defenses against infections?

Accepted Answer

A)   Genetic defects in immunity
B)   Physical and mental stress
C)   Strong, healthy body
D)   Chemotherapy
E)   Old ageF) A) and C)
G) A) and B)

Question 11

All of the following are examples of epigenetic changes except

Accepted Answer

A)   histones are altered, which affects replication and transcription.
B)   microbial mucinase digests the protective lining of mucous membranes.
C)   host cell genome is altered, interrupting transcription.
D)   microbe binds to small RNAs disrupting gene regulation.E) None of the above
F) A) and C)

Question 12

Opportunistic pathogens

Accepted Answer

A)   cause disease in every individual.
B)   cause disease in compromised individuals.
C)   are always pathogens.
D)   have well-developed virulence factors.E) None of the above
F) A) and D)

Question 13

When would Koch's postulates be utilized?

Accepted Answer

A)   to determine the cause of a patient's illness in a hospital microbiology lab
B)   to develop a new antibiotic in a pharmaceutical lab
C)   to determine the cause of a new disease in a microbiology research lab
D)   to formulate a vaccine against a new pathogen in a genetic engineering lab
E)   whenever the scientific method cannot be used to investigate a microbiological problemF) A) and B)
G) C) and D)

Question 14

An infectious agent that originates from outside the body is called ______.

Accepted Answer

A)   exogenous
B)   an exotoxin
C)   an enterotoxin
D)   endogenous
E)   axenicF) B) and C)
G) A) and E)

Question 15

Resident biota are found in/on the ______.

Accepted Answer

A)   skin
B)   mouth
C)   nasal passages
D)   large intestine
E)   All of the choices are correct.F) C) and D)
G) A) and C)

Question 16

Enterotoxins are ______.

Accepted Answer

A)   virulence factors
B)   toxins that target the intestines
C)   proteins
D)   exotoxins
E)   All of the choices are correct.F) A) and B)
G) B) and D)

Question 17

Fomites,food,and air serve as indirect transmission routes of pathogens.

Accepted Answer

A) True 
 B)False

Question 18

Physicians are required to report new cases of gonorrhea to the CDC,whereas new cases of genital herpes are not notifiable.Evaluate the statements below and choose which statement best represents why some diseases are reportable and others are not.

Accepted Answer

A)   Gonorrhea is treatable with antibiotics and therefore may develop resistance; genital herpes is not treatable with antibiotics.
B)   Genital herpes is less deadly than gonorrhea.
C)   Gonorrhea is more contagious than genital herpes.
D)   Gonorrhea affects certain populations and geographic areas, whereas genital herpes does not.E) A) and D)
F) A) and C)

Question 19

Various bacterial enzymes that dissolve fibrin clots are ______.

Accepted Answer

A)   coagulases
B)   mucinases
C)   keratinases
D)   kinases
E)   hyaluronidasesF) C) and D)
G) B) and D)

Question 20

An infectious agent already existing on or in the body is called ______.

Accepted Answer

A)   exogenous
B)   an exotoxin
C)   an enterotoxin
D)   endogenous
E)   axenicF) A) and D)
G) B) and E)

Exam 13: Microbe-Human Interactions: Health and Disease

Which genus is the most common resident biota of mouth surfaces?

Correct Answer
verified

Infections that go unnoticed because there are no symptoms are called ______.

Correct Answer
verified

Which of the following is not a factor that weakens host defenses against infections?

Correct Answer
verified

Various bacterial enzymes that dissolve fibrin clots are ______.

Correct Answer
verified

The Centers for Disease Control and Prevention assigns the most virulent microbes known to cause human disease to biosafety level 4.

Correct Answer
verified

All of the following are examples of epigenetic changes except

Correct Answer
verified

Resident biota are found in/on the ______.

Correct Answer
verified

When would Koch's postulates be utilized?

Correct Answer
verified

Carriers that shed and transmit pathogens while they are recovering from an infectious disease are called ______ carriers.

Correct Answer
verified

The number of persons afflicted with an infectious disease is the _____ rate.

Correct Answer
verified

Opportunistic pathogens

Correct Answer
verified

Fomites,food,and air serve as indirect transmission routes of pathogens.

Correct Answer
verified

Lipopolysaccharide of the outer membrane of gram-negative cell walls is called ______.

Correct Answer
verified

An infectious agent that originates from outside the body is called ______.

Correct Answer
verified

Correct Answer
verified

Normal biota includes each of the following except ______.

Correct Answer
verified

An intermediary inanimate object from which an infectious agent is acquired is termed a ______.

Correct Answer
verified

Physicians are required to report new cases of gonorrhea to the CDC,whereas new cases of genital herpes are not notifiable.Evaluate the statements below and choose which statement best represents why some diseases are reportable and others are not.

Correct Answer
verified

An infectious agent already existing on or in the body is called ______.

Correct Answer
verified

Enterotoxins are ______.

Correct Answer
verified

Exam 13: Microbe-Human Interactions: Health and Disease

Which genus is the most common resident biota of mouth surfaces?

Correct AnswerverifiedShow Answer

Infections that go unnoticed because there are no symptoms are called ______.

Correct AnswerverifiedShow Answer

Which of the following is not a factor that weakens host defenses against infections?

Correct AnswerverifiedShow Answer

Various bacterial enzymes that dissolve fibrin clots are ______.

Correct AnswerverifiedShow Answer

The Centers for Disease Control and Prevention assigns the most virulent microbes known to cause human disease to biosafety level 4.

Correct AnswerverifiedShow Answer

All of the following are examples of epigenetic changes except

Correct AnswerverifiedShow Answer

Resident biota are found in/on the ______.

Correct AnswerverifiedShow Answer

When would Koch's postulates be utilized?

Correct AnswerverifiedShow Answer

Carriers that shed and transmit pathogens while they are recovering from an infectious disease are called ______ carriers.

Correct AnswerverifiedShow Answer

The number of persons afflicted with an infectious disease is the _____ rate.

Correct AnswerverifiedShow Answer

Opportunistic pathogens

Correct AnswerverifiedShow Answer

Fomites,food,and air serve as indirect transmission routes of pathogens.

Correct AnswerverifiedShow Answer

Lipopolysaccharide of the outer membrane of gram-negative cell walls is called ______.

Correct AnswerverifiedShow Answer

An infectious agent that originates from outside the body is called ______.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Normal biota includes each of the following except ______.

Correct AnswerverifiedShow Answer

An intermediary inanimate object from which an infectious agent is acquired is termed a ______.

Correct AnswerverifiedShow Answer

Physicians are required to report new cases of gonorrhea to the CDC,whereas new cases of genital herpes are not notifiable.Evaluate the statements below and choose which statement best represents why some diseases are reportable and others are not.

Correct AnswerverifiedShow Answer

An infectious agent already existing on or in the body is called ______.

Correct AnswerverifiedShow Answer

Enterotoxins are ______.

Correct AnswerverifiedShow Answer

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