Skin Clip For AFB/Ear
- Sample Type
- Skin Smear
- Fasting
- No
- Unit
- Bacterial Index (BI)
Function
The Skin Clip (or Slit-Skin Smear) for Acid-Fast Bacilli (AFB) is a specialized diagnostic test used primarily to detect Mycobacterium leprae, the causative agent of Leprosy (Hansen's Disease). The procedure involves taking a small scrape or 'clip' from the earlobe or skin lesions to look for bacteria that retain red dye after an acid wash (Acid-Fast).
Why it is Ordered
It is ordered when a patient presents with suspicious dermatological and neurological symptoms, such as:
- Hypopigmented Patches: Skin areas that have lost color and, crucially, lost sensation.
- Thickened Nerves: Enlargement of peripheral nerves (e.g., ulnar or peroneal).
- Nodules: Skin-colored or reddish lumps on the face or ears.
- Loss of Eyebrows: A classic sign of advanced lepromatous leprosy.
Associated Conditions
- Paucibacillary Leprosy: A form with few bacteria where the smear might be negative despite disease presence.
- Multibacillary Leprosy: A more severe form where the smear is usually strongly positive.
- Atypical Mycobacterial Infections: Rarely, other acid-fast organisms can be found in the skin.
This test is essential for classifying the type of leprosy, which determines the duration and intensity of the Multi-Drug Therapy (MDT) required for a cure.
Check Your Result
Check Your Result
Enter your lab result to see where you stand compared to the standard reference range.
Why Context Matters
The sensitivity of the skin smear is relatively low in 'Tuberculoid' (Paucibacillary) leprosy; a negative result does not rule out the disease. The quality of the smear—how deep the incision was and whether enough tissue fluid was obtained—is critical. If symptoms persist despite a negative smear, a full-thickness skin biopsy for histopathology is often required as a second opinion.
Lab ranges are statistical averages, not biological laws. "Normal" for a 20-year-old male isn't normal for a 60-year-old female.
Related Indicators
Medically Reviewed by Dr. Binoy Babu, MBBS
Board Certified Doctor • 10+ Years Clinical Experience
Dr. Babu is a practicing physician dedicated to empowering patients with clear, actionable medical information. He founded 2opi to bridge the gap between complex lab reports and patient understanding, ensuring everyone has access to a reliable second opinion.
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