Textbook Question
A purified protein from Mycobacterium tuberculosis is injected into a person’s skin. A hardened, red area develops around the injection site within 3 days.
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Ch. 18 - Practical Applications of Immunology
Tortora14th EditionMicrobiology: An IntroductionISBN: 9780138200398
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Table of contents
- Ch. 1 - The Microbial World and You18
- Ch. 2 - Chemical Principles20
- Ch. 3 - Observing Microorganisms Through a Microscope18
- Ch. 4 - Functional Anatomy of Prokaryotic and Eukaryotic Cells21
- Ch. 5 - Microbial Metabolism20
- Ch. 6 - Microbial Growth20
- Ch. 7 - The Control of Microbial Growth20
- Ch. 8 - Microbial Genetics19
- Ch. 9 - Biotechnology & DNA Technology20
- Ch. 10 - Classification of Microorganisms15
- Ch. 11 - The Prokaryotes: Domains Bacteria and Archaea14
- Ch. 12 - The Eukaryotes: Fungi, Algae, Protozoa, and Helminths17
- Ch. 13 - Viruses, Viroids, and Prions20
- Ch. 14 - Principles of Disease and Epidemiology21
- Ch. 15 - Microbial Mechanisms of Pathogenicity19
- Ch. 16 - Innate Immunity: Nonspecific Defenses of the Host20
- Ch. 17 - Adaptive Immunity: Specific Defenses of the Host20
- Ch. 18 - Practical Applications of Immunology20
- Ch. 19 - Disorders Associated with the Immune System19
- Ch. 20 - Antimicrobial Drugs19
- Ch. 21 - Microbial Diseases of the Skin and Eyes21
- Ch. 22 - Microbial Diseases of the Nervous System19
- Ch. 23 - Microbial Diseases of the Cardiovascular and Lymphatic Systems20
- Ch. 24 - Microbial Diseases of the Respiratory System20
- Ch. 25 - Microbial Diseases of the Digestive System20
- Ch. 26 - Microbial Diseases of the Urinary and Reproductive Systems19
- Ch. 27 - Environmental Microbiology20
- Ch. 28 - Applied and Industrial Microbiology19
Tortora14th EditionMicrobiology: An IntroductionISBN: 9780138200398Not the one you use?Change textbook
Chapter 18, Problem 9
Match each of the following tests in column A to its positive reaction in column B.
Verified step by step guidance1
Since the problem involves matching tests to their positive reactions, start by identifying each test in column A and recalling the principle behind it—what biochemical or physiological change it detects in microorganisms.
For each test, review the typical positive result: for example, color changes, gas production, precipitate formation, or other visible indicators that signify a positive reaction.
Write down the characteristic positive reaction for each test based on your microbiology knowledge or reference materials, ensuring you understand why that reaction occurs.
Compare the positive reactions listed in column B with your notes for each test, and match them accordingly by linking the test to its corresponding positive result.
Double-check your matches by considering the biochemical basis of each test to confirm that the positive reaction logically fits the test's purpose and expected outcome.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Biochemical Tests in Microbiology
Biochemical tests are laboratory procedures used to identify microorganisms based on their metabolic activities. Each test detects specific enzymes or metabolic products, helping differentiate species by their unique biochemical reactions.
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Interpreting Positive Reactions
A positive reaction in a biochemical test indicates the presence of a particular enzyme or metabolic product. Recognizing color changes, gas production, or precipitate formation is essential to correctly match tests with their positive outcomes.
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Correlation Between Test and Microbial Function
Understanding how each biochemical test relates to microbial physiology allows accurate matching of tests to results. For example, a catalase test detects catalase enzyme activity by bubble formation, linking the test to its positive reaction.
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Related Practice
Textbook Question
In an agglutination test, eight serial dilutions to determine antibody titer were set up: Tube 1 contained a 1:2 dilution; tube 2, a 1:4, and so on. If tube 5 is the last tube showing agglutination, what is the antibody titer?
a. 5
b. 1:5
c. 32
d. 1:32
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Textbook Question
Test used to identify rabies virus in the brain of a dog.
a. Direct fluorescent antibody
b. Indirect fluorescent antibody
c. Rabies immune globulin
d. Killed rabies virus
e. None of the above
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Textbook Question
Test used to detect the presence of antibodies in a patient’s serum.
a. Direct fluorescent antibody
b. Indirect fluorescent antibody
c. Rabies immune globulin
d. Killed rabies virus
e. None of the above
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Textbook Question
Match the following serological tests in column A to the descriptions in column B.
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