Positive diagnosis of HIV infection is made on the basis of which criteria?

WCL Staff Nurse - 2019

Medical Surgical Nursing

Easy

Appeared in: WCL Staff Nurse - 2019

Explanation

A definitive diagnosis of HIV infection relies on laboratory confirmation, not solely on clinical signs or risk factors.
The standard diagnostic protocol is a two-step process involving a highly sensitive screening test followed by a highly specific confirmatory test.
The Enzyme-Linked Immunosorbent Assay (ELISA) is the traditional screening test, which, if positive, is confirmed using the Western Blot test.
A positive result on both the screening (ELISA) and confirmatory (Western Blot) tests establishes a positive diagnosis of HIV infection.

Option A: A history of high-risk sexual behavior is a significant risk factor that increases the likelihood of exposure to HIV, but it does not confirm infection. Many individuals with high-risk behaviors do not contract the virus.
Option C: Opportunistic infections (OIs) are illnesses that occur more frequently and are more severe in people with weakened immune systems, such as those with advanced HIV infection (AIDS). The presence of an OI suggests immunosuppression but does not diagnose the underlying cause.
Option D: Extreme weight loss (wasting syndrome) and fever are non-specific constitutional symptoms. They can be associated with advanced HIV/AIDS but are also common in many other infectious diseases, malignancies, and chronic illnesses.

Clinical Relevance

Nursing practice connection: Use the key finding related to Laboratory diagnosis of HIV infection to guide bedside assessment, documentation, and the next nursing action.
Accurate diagnosis is the critical first step for initiating Antiretroviral Therapy (ART), which suppresses viral replication, preserves immune function, and improves quality of life.
A confirmed diagnosis allows for essential patient counseling on preventing transmission to others, managing the condition long-term, and the importance of partner notification and testing.
Early and accurate diagnosis helps in reducing the stigma associated with HIV and connects individuals to necessary care, treatment, and support services.

How to Approach the Question

First, identify the core of the question. It asks for the definitive 'criteria' for a 'positive diagnosis' of HIV infection.
Analyze the options to differentiate between risk factors, symptoms, and diagnostic tests.
Recognize that a 'history of high-risk behavior' is a risk factor, not a diagnosis.
Understand that 'opportunistic infection' and 'weight loss/fever' are clinical manifestations or complications, often of advanced disease, but are not the primary method of diagnosing the infection itself.
Recall that definitive diagnosis of most infectious diseases relies on specific laboratory tests that identify the pathogen or the body's immune response to it.
Select the option that describes the standard laboratory testing protocol for HIV, which involves both a screening and a confirmatory test.

Concept Tested & Keywords

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