VDRL is used in the diagnosis of?

Appeared in: RUHS, Jaipur, PB B.Sc Nursing Entrance-2018

Explanation

VDRL, which stands for Venereal Disease Research Laboratory, is a classic non-treponemal serological test used for screening for Syphilis.
It works by detecting reagin antibodies (like IgG and IgM) that are produced by the body in response to cellular damage caused by the Treponema pallidum bacterium.
A key use of the VDRL test is in monitoring the effectiveness of syphilis treatment. A significant drop in the antibody titer after treatment indicates a successful response.
Due to the non-specific nature of the antibodies it detects, a positive VDRL result always requires confirmation with a specific treponemal test, such as the FTA-ABS or TP-PA.

Why Other Options Were Wrong

Option A: The VDRL test does not detect HIV antibodies or antigens. HIV diagnosis relies on specific tests that identify antibodies to the virus or the virus's genetic material.
Option B: VDRL is not used for Typhoid fever. The diagnosis of typhoid relies on detecting antibodies against Salmonella Typhi or isolating the bacteria from cultures.
Option C: The VDRL test has no role in diagnosing Tuberculosis (TB). TB diagnosis is based on the body's immune reaction to TB bacteria or direct detection of the bacteria.

Related Visual

A flowchart illustrating the two-step syphilis testing algorithm. It should begin with a non-treponemal test VDRL/RPR. A positive result branches to a confirmatory treponemal...

Clinical Relevance

Nursing practice connection: Use the key finding related to Diagnostic screening for Syphilis to guide bedside assessment, documentation, and the next nursing action.
Nurses are central to public health screening programs, including routine antenatal screening for syphilis to prevent mother-to-child transmission (congenital syphilis).
Patient education is a key nursing responsibility. Nurses must explain to patients that a positive VDRL is a screening result and that a confirmatory test is needed to make a diagnosis, helping to reduce anxiety.
Nurses must be aware of conditions that can cause false-positive VDRL results, such as pregnancy, autoimmune diseases (e.g., lupus), and some viral infections, to interpret results in the correct clinical context.

How to Approach the Question

First, identify the keyword in the question stem, which is 'VDRL'. Recognize this as an acronym for a specific medical diagnostic test.
Recall the full name if possible: Venereal Disease Research Laboratory. The term 'Venereal Disease' is a strong clue that the test is related to sexually transmitted infections (STIs).
Analyze the options provided: HIV, Typhoid, Tuberculosis, and Syphilis. All are infectious diseases.
Connect the clue 'Venereal Disease' to the options. Syphilis is a classic venereal disease.
Confirm the association: VDRL is the standard screening test for Syphilis.
Eliminate the other options by recalling their primary diagnostic methods (e.g., ELISA for HIV, Widal test for Typhoid, Mantoux test for TB).

Concept Tested & Keywords

Concept Tested: Diagnostic screening for Syphilis
Stem keywords: VDRL, diagnosis
Lead-in keywords: is used in
Negative lead-in flag: false

Question ID

QbeZjO402NNScufK1avoF0

Reference Book

E6 Nelson Textbook of Pediatrics(2024) — Volume 1 p. 1874-1876

E6 Pathology-Vandana Puri & Kavita Gaur Textbook of Pathology and Genetics p. 410-412

E6 Robert Boland, Marcia L. Verduin - Kaplan and Sadock's Comprehensive Text of Psychiatry-Wolters Kluwer Health (2024) (pp 1-16525 of 16525) p. 3453-3455

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