Question 1

You place an inoculum of your bacterium on a glass slide and add a drop of hydrogen peroxide reagent.Promptly you see bubbles appear,indicating the presence of a particular enzyme that the bacterium produces.What type of identification test does this exemplify?

Accepted Answer

A)  biochemical test
B)  microarray
C)  precipitation test
D)  immunochromatographyE) A) and C)
F) C) and D)

Question 2

Which test uses radioactive isotopes to label antibodies or antigens in order to detect minute amounts of corresponding antigen or antibody?

Accepted Answer

A)  Ouchterlony double diffusion
B)  Western blot
C)  immunelectrophoresis
D)  radioimmunoassay (RI
A)  
E)  the Quellung testF) None of the above
G) A) and E)

Question 3

What type of test will detect cell-associated antigens?

Accepted Answer

A)  cross-reaction
B)  agglutination
C)  precipitation
D)  specificity
E)  sensitivityF) A) and B)
G) All of the above

Question 4

Which of the following is correct regarding the polymerse chain reaction test?

Accepted Answer

A)  First antigen and antibody are allowed to react.
B)  An enzyme-linked indicator is added.
C)  Sheep red blood cells are added to the gel.
D)  The two strands of the DNA molecules are separated by heat.E) A) and D)
F) B) and C)

Question 5

Direct antigen testing differs from direct fluorescence testing in that the results

Accepted Answer

A)  are read with the naked eye.
B)  require specialized equipment.
C)  are more accurate.
D)  are less accurate.
E)  require an electron microscope.F) All of the above
G) C) and D)

Question 6

Titer is the amount of _____ in serum.

Accepted Answer

A)  antigen
B)  antibody
C)  WBC
D)  complement
E)  memory cellsF) A) and E)
G) None of the above

Question 7

All of the following are routinely collected for microbial analysis of a specimen except:

Accepted Answer

A)  saliva.
B)  skin.
C)  spinal fluid.
D)  hair.
E)  blood.F) D) and E)
G) A) and E)

Question 8

Soluble antigens are detected in this type of test:

Accepted Answer

A)  cross-reactions
B)  agglutination
C)  precipitation
D)  specificity
E)  sensitivityF) None of the above
G) C) and E)

Question 9

A serum titer involves

Accepted Answer

A)  quantifying the number of infectious particles in a specimen.
B)  determining the lowest dilution of serum that produces a visible reaction.
C)  determining the highest dilution of serum that produces a visible reaction.
D)  the Western blot method.E) A) and B)
F) A) and C)

Question 10

Specimen collection

Accepted Answer

A)  is always done by a medical professional.
B)  must be done under sterile conditions.
C)  must utilize aseptic techniques.
D)  does not require special handling.E) A) and B)
F) A) and C)

Question 11

Which of the following is not a phenotypic method of identification?

Accepted Answer

A)  morphology
B)  Gram stain reaction
C)  acid-fast reaction
D)  antibody response
E)  endospore productionF) B) and E)
G) All of the above

Question 12

If you were going to identify microorganisms within a specimen containing large numbers of organisms (seawater,body flora,etc. ) ,you would have to:

Accepted Answer

A)  use different kinds of serological tests.
B)  use a wide variety of microbiological media to identify all of the different species of microorganisms.
C)  use a wide variety of antibodies to react with the antigens.
D)  amplify gene sequences within the sample to identify each of the different organisms.E) B) and C)
F) A) and D)

Question 13

The dyes fluorescein and rhodamine

Accepted Answer

A)  can be used to label antibodies in immunofluorescence tests.
B)  emit visible light in response to ultraviolet radiation.
C)  are observed using fluorescence microscopy.
D)  are used to identify pathogens of chlamydiosis,Legionnaires' disease,and others.
E)  All of the choices are correct.F) A) and B)
G) D) and E)

Question 14

The property of a test to detect only a certain antibody or antigen and not to react with any others is

Accepted Answer

A)  cross-reaction.
B)  agglutination.
C)  precipitation.
D)  specificity.
E)  sensitivity.F) B) and D)
G) B) and C)

Exam 17: Diagnosing Infections

Which of the following is correct regarding the polymerse chain reaction test?

Correct Answer
verified

The property of a test to detect only a certain antibody or antigen and not to react with any others is

Correct Answer
verified

Direct antigen testing differs from direct fluorescence testing in that the results

Correct Answer
verified

You place an inoculum of your bacterium on a glass slide and add a drop of hydrogen peroxide reagent.Promptly you see bubbles appear,indicating the presence of a particular enzyme that the bacterium produces.What type of identification test does this exemplify?

Correct Answer
verified

Which test uses radioactive isotopes to label antibodies or antigens in order to detect minute amounts of corresponding antigen or antibody?

Correct Answer
verified

All of the following are routinely collected for microbial analysis of a specimen except:

Correct Answer
verified

If you were going to identify microorganisms within a specimen containing large numbers of organisms (seawater,body flora,etc. ) ,you would have to:

Correct Answer
verified

What type of test will detect cell-associated antigens?

Correct Answer
verified

Soluble antigens are detected in this type of test:

Correct Answer
verified

A serum titer involves

Correct Answer
verified

The dyes fluorescein and rhodamine

Correct Answer
verified

Specimen collection

Correct Answer
verified

Which of the following is not a phenotypic method of identification?

Correct Answer
verified

Titer is the amount of _____ in serum.

Correct Answer
verified

Exam 17: Diagnosing Infections

Which of the following is correct regarding the polymerse chain reaction test?

Correct AnswerverifiedShow Answer

The property of a test to detect only a certain antibody or antigen and not to react with any others is

Correct AnswerverifiedShow Answer

Direct antigen testing differs from direct fluorescence testing in that the results

Correct AnswerverifiedShow Answer

You place an inoculum of your bacterium on a glass slide and add a drop of hydrogen peroxide reagent.Promptly you see bubbles appear,indicating the presence of a particular enzyme that the bacterium produces.What type of identification test does this exemplify?

Correct AnswerverifiedShow Answer

Which test uses radioactive isotopes to label antibodies or antigens in order to detect minute amounts of corresponding antigen or antibody?

Correct AnswerverifiedShow Answer

All of the following are routinely collected for microbial analysis of a specimen except:

Correct AnswerverifiedShow Answer

If you were going to identify microorganisms within a specimen containing large numbers of organisms (seawater,body flora,etc. ) ,you would have to:

Correct AnswerverifiedShow Answer

What type of test will detect cell-associated antigens?

Correct AnswerverifiedShow Answer

Soluble antigens are detected in this type of test:

Correct AnswerverifiedShow Answer

A serum titer involves

Correct AnswerverifiedShow Answer

The dyes fluorescein and rhodamine

Correct AnswerverifiedShow Answer

Specimen collection

Correct AnswerverifiedShow Answer

Which of the following is not a phenotypic method of identification?

Correct AnswerverifiedShow Answer

Titer is the amount of _____ in serum.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
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Correct Answer
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