A baby brought in the Skin OPD of Dermatological department with his parents. In OPD doctor is doing Burrows ink Test (BIT) for the baby. This test is commonly used to diagnose which skin disease?

1. A

   Vitiligo

2. B

   Scabies

3. C

   Impetigo

4. D

   Psoriasis

Appeared in: NORCET 3 - 2022 (Shift-2)

Explanation

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• Scabies.
• Scabies is an infestation caused by the mite Sarcoptes scabiei, which creates characteristic burrows in the epidermis.
• The Burrow's Ink Test (BIT) is specifically designed to make these burrows visible by staining them with ink.
• The test works by applying ink over a suspected area and then wiping it off; the ink that has penetrated the burrow remains, revealing a thin, dark, wavy line.
• This direct visualization of a burrow is a classic diagnostic sign for scabies.

Why Other Options Were Wrong

• Option A: Vitiligo is a pigmentation disorder characterized by white patches on the skin due to loss of melanocytes. It does not involve mites or burrows, so the BIT would be irrelevant.
• Option C: Impetigo is a superficial bacterial infection, typically caused by Staphylococcus or Streptococcus, leading to vesicles and honey-colored crusts. It does not involve burrows.
• Option D: Psoriasis is a chronic inflammatory autoimmune condition that results in well-demarcated, erythematous plaques with silvery scales. The pathophysiology does not involve burrowing organisms.

Related Visual

• Visual 1: Infographic - A step-by-step illustration of the Burrow's Ink Test procedure, showing the application of ink, wiping, and the final appearance of a positive test.
• Visual 2: Image - A close-up photograph of a positive Burrow's Ink Test on the skin, clearly showing the dark, wavy line of the stained burrow.
• Visual 3: Diagram - A microscopic view of the Sarcoptes scabiei mite within a skin burrow, illustrating the pathophysiology of the infestation.

Clinical Relevance

• Nursing practice connection: Knowing Diagnostic procedures for common dermatological conditions, specifically scabies helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
• Accurate and quick diagnosis of scabies is crucial in clinical practice to initiate timely treatment and prevent transmission, especially in crowded settings like schools, childcare centers, and long-term care facilities.
• Nurses play a key role in patient education regarding scabies treatment, which involves treating the patient and all close household contacts simultaneously, even if they are asymptomatic, to eradicate the infestation and prevent re-infestation.
• It is important to inform patients that itching can persist for 2-4 weeks even after successful treatment due to a hypersensitivity reaction to the dead mites and their products. This helps manage patient expectations and ensures compliance.

How to Approach the Question

• First, identify the core of the question: it asks for the disease diagnosed by a specific test, the 'Burrows ink Test (BIT)'.
• Analyze the name of the test itself. The term 'Burrow' is a major clue, suggesting the test is designed to find something that burrows under the skin.
• Review the options provided: Vitiligo, Scabies, Impetigo, Psoriasis.
• Evaluate each disease based on its known pathology. Ask yourself, 'Which of these conditions involves a burrowing organism or formation of burrows?'
• Recall or deduce that Scabies is caused by a mite that burrows into the skin. The other conditions have different causes (autoimmune, bacterial) and do not involve burrows.
• Conclude that a test designed to highlight burrows must be for diagnosing Scabies.

Concept Tested & Keywords

• Concept Tested: Diagnostic procedures for common dermatological conditions, specifically scabies.
• Stem keywords: Burrows ink Test, BIT, skin disease, diagnose
• Lead-in keywords: commonly used to diagnose
• Clinical cues: baby
• Clinical cues: Skin OPD

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