Microbiology: An Introduction
12th Edition
ISBN: 9780321929150
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case
Publisher: PEARSON
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Chapter 18, Problem 6MCQ
Summary Introduction
Introduction:
Elek’s test is an immunodiffusion test which helps to detect the toxigenecity of diphtheria. A filter paper strip containing diphtheria antitoxin is placed on a solid culture medium. Then, bacteria are streaked through the right angle to the filter paper. If the bacteria are toxigenic, a line of antigen and antibody precipitate will form.
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Which of the following is NOT TRUE about immunological tests?
Question 2 options:
A
Antibodies can be used to detect specific antigens
B
An agglutination reaction is the reaction of an antibody with a soluable antigen
C
An agglutination reaction is the result of a particulate antigen with a specific antibody
D
Based on reactions between antigen and antibody
E
Precipitation reactions cannot be seen with the naked eye
Which of the following statements regarding sandwich ELISA is correct?
Select one:
A. The detection antibody can bind to the Fc region of the capture antibody.
B. Antigens are sandwiched between the detection and the enzyme-linked antibodies.
C. Washing steps are needed after addition of an antibody.
D. The capture and detection antibodies recognize the same epitope on a captured antigen.
E. Antigens are coated on the surface of a microtiter plate.
What can you say about a positive latex agglutination test?
Question 3 options:
A
It shows the patient is sick with the disease
B
It shows the patient has never been exposed to the disease
C
It shows the patient has both the antibodies and the antigen for a disease
D
It shows no agglutination
E
It shows the patient has the antibodies to a disease
Chapter 18 Solutions
Microbiology: An Introduction
Ch. 18 - Which could cause the disease it is supposed to...Ch. 18 - Define the following terms, and give an example of...Ch. 18 - DRAW IT Label the components of the direct and...Ch. 18 - How are monoclonal antibodies produced? What is...Ch. 18 - Explain the effects of excess antigen and antibody...Ch. 18 - Prob. 6RCh. 18 - How does the antigen in an agglutination reaction...Ch. 18 - Match the following serological tests in column A...Ch. 18 - Prob. 9RCh. 18 - Prob. 10R
Ch. 18 - Prob. 1MCQCh. 18 - Prob. 2MCQCh. 18 - Prob. 3MCQCh. 18 - Prob. 4MCQCh. 18 - Prob. 5MCQCh. 18 - Prob. 6MCQCh. 18 - Prob. 7MCQCh. 18 - Test used to identify rabies virus in the brain of...Ch. 18 - Prob. 9MCQCh. 18 - Prob. 10MCQCh. 18 - What problems are associated with the use of live...Ch. 18 - Prob. 2ACh. 18 - Prob. 3ACh. 18 - Which of the following is proof of a disease...Ch. 18 - Prob. 2CAECh. 18 - Prob. 3CAECh. 18 - Prob. 4CAE
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