VDRL test is done for diagnosis of?

Appeared in: IGNOU PB Bsc Nsg Entrance-2017

Explanation

The VDRL (Venereal Disease Research Laboratory) test is a standard screening tool for Syphilis.
It is a non-treponemal flocculation test that detects non-specific reagin antibodies produced by the body in response to infection with Treponema pallidum.
The test is widely used for screening large populations (like blood donors and pregnant women) and for monitoring the effectiveness of treatment, as the antibody titer decreases with successful therapy.

Option A: The primary screening test for Tuberculosis is the Mantoux (tuberculin skin) test, and diagnosis is confirmed with sputum analysis (smear, culture) or molecular tests like GeneXpert.
Option B: Diphtheria diagnosis relies on clinical presentation and is confirmed by isolating the bacterium Corynebacterium diphtheriae from a throat swab culture and testing for toxin production (Elek's test).
Option D: Typhoid fever is diagnosed serologically with the Widal test, but the gold standard is isolating Salmonella typhi from a blood culture.

Clinical Relevance

Nursing practice connection: Use the key finding related to Diagnostic tests for infectious diseases to guide bedside assessment, documentation, and the next nursing action.
A key nursing responsibility is to understand that a positive VDRL test is not a definitive diagnosis; it requires a confirmatory test due to the risk of false positives from conditions like pregnancy, autoimmune diseases, or other infections.
Nurses play a crucial role in patient education, explaining the need for follow-up testing and the importance of treatment adherence to prevent progression to secondary or tertiary syphilis.
When monitoring a patient's response to syphilis treatment, a decreasing VDRL titer is an expected sign of successful therapy, while a persistently high or rising titer may indicate treatment failure or reinfection.

How to Approach the Question

First, identify the core term in the question: 'VDRL test'.
This is a factual recall question. Access your knowledge of common laboratory diagnostic tests from microbiology and pathology.
Systematically evaluate each option. Recall the primary diagnostic methods for each disease.
Tuberculosis is linked to Mantoux/sputum tests. Diphtheria to throat swabs. Typhoid to Widal/blood culture.
Recognize that VDRL stands for Venereal Disease Research Laboratory, which strongly hints at its use for a sexually transmitted infection (venereal disease).
Conclude that VDRL is the classic screening test for Syphilis.

Concept Tested & Keywords

Q4ONJlVgR9uQRfLPtpvJ2v

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

E6 Medicine Davidson Principles Practice 24e p. 359-361

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

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