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Exam 15: Diagnosing Infections

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Question 1

Multiple Choice

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Syphilis can be diagnosed by the

A) Weil-Felix reaction.
B) rapid plasma reagin test.
C) Widal test.
D) latex agglutination test.
E) antistreptolysin O test.

F) A) and C)
G) All of the above

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Question 2

Multiple Choice

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Soluble antigens are detected in this type of test.

A) cross reactions
B) agglutination
C) precipitation
D) specificity
E) sensitivity

F) None of the above
G) A) and B)

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Question 3

Multiple Choice

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The property of a test to detect even small amounts of antibodies or antigens that are test targets is

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

Serological testing relies upon

The Weil-Felix test is used for diagnosing salmonellosis.

Animals are required for the cultivation of

Which sample is not typically collected by sterile needle aspiration?

Precipitation tests involve all of the following except

Please read the clinical scenario, and then answer the question that follow to become familiar with the traditional NCLEX question format. Halley is a 62-year-old female, previously healthy with no significant medical history, and no known allergies. She is admitted to your medical-surgical floor for an infectious disease work-up. Halley has been experiencing generalized pain and nausea for the past 3 weeks, and recently developed a fever. The doctors at the urgent care center, and then the emergency department, were perplexed by her presentation. You have been ordered to perform several tests: complete blood count (CBC) , C-reactive protein (CRP) , eosinophil sedimentation rate (ESR) , blood culture, urine culture, and a lumbar puncture with cerebral spinal fluid (CSF) culture and cell count. You are also collecting a sputum culture, as well as swabbing her nose with a culturette, and performing a nasal wash. -Halley's nasal wash results came back,and were reported as "insufficient cells available for testing." What does this mean?

Which test is especially good for bacteria that are not readily cultivated in the lab?

It is necessary to do lab tests to diagnose all diseases.

Antibody testing requires

The Western blot test is confirmatory for HIV because

A positive serological test for tuberculosis indicates that

Please read the clinical scenario, and then answer the question that follow to become familiar with the traditional NCLEX question format. Jared is a 34-year-old male who has reported several weeks of general malaise, and a low-grade fever. You are a nurse working for the public health department, and you are corresponding with Jared concerning the results of his laboratory testing. -Jared informs you that he previously had a negative HIV PCR test performed about a month ago.What is your interpretation of this information?

The tuberculin test is an example of an in vitro serological test.

Please read the clinical scenario, and then answer the question that follow to become familiar with the traditional NCLEX question format. Tyler is a 16-year-old male who has come into your clinic with a low-grade fever, and large and painful red sores around his lips. He has a PCR test pending that was swabbed from the sores, as well as a blood culture with Gram stain, and nasal wash for examination by microscope. -What kind of evidence are the sores around Tyler's mouth classified as?

Biochemical tests include all of the following except

Serological testing always involves reactions between specific antibody and antigen.