Question 1

The Western blot test is confirmatory for HIV because it

Accepted Answer

A)   is more sensitive than the ELISA.
B)   has fewer false positives than the ELISA.
C)   requires electrophoresis, whereas the ELISA does not.
D)   uses an indicator of some sort to visualize the antibody.
E)   All of the choices are correct.F) None of the above
G) B) and D)

Question 2

Serological testing can be used to test each of the following except ______.

Accepted Answer

A)   cerebrospinal fluid
B)   blood serum
C)   skin
D)   urine
E)   salivaF) C) and D)
G) C) and E)

Question 3

Precipitation tests involve all of the following except

Accepted Answer

A)   a cloudy or opaque zone developing where antigen and antibody react.
B)   they rely on formation of visible clumps for detection.
C)   they can be done in a test tube by carefully adding antiserum over antigen solution.
D)   they include the VDRL test for syphilis.
E)   they are often performed in agar gels.F) All of the above
G) A) and B)

Question 4

In your microbiology lab,your class is identifying bacteria.You are using dichotomous keys to aid in the identification process using the data from a variety of biochemical tests.What problems do you foresee in this procedure?

Accepted Answer

A)   Dichotomous keys are not valid for identification.
B)   If you misread a biochemical test or write down the wrong result, the key will likely take you to an alternative organism that is not your unknown bacterium.
C)   Dichotomous keys are too sophisticated to read properly, so you are worried that there will be a large degree of error in your identification.
D)   The dichotomous key does not contain information on your bacterium.E) B) and D)
F) None of the above

Exam 17: Diagnosing Infections

The Western blot test is confirmatory for HIV because it

Correct Answer
verified

Precipitation tests involve all of the following except

Correct Answer
verified

In your microbiology lab,your class is identifying bacteria.You are using dichotomous keys to aid in the identification process using the data from a variety of biochemical tests.What problems do you foresee in this procedure?

Correct Answer
verified

Serological testing can be used to test each of the following except ______.

Correct Answer
verified

Exam 17: Diagnosing Infections

The Western blot test is confirmatory for HIV because it

Correct AnswerverifiedShow Answer

Precipitation tests involve all of the following except

Correct AnswerverifiedShow Answer

In your microbiology lab,your class is identifying bacteria.You are using dichotomous keys to aid in the identification process using the data from a variety of biochemical tests.What problems do you foresee in this procedure?

Correct AnswerverifiedShow Answer

Serological testing can be used to test each of the following except ______.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified