Skin Clip For A.F.B. (Acid-Fast Bacilli)
- Sample Type
- Skin Tissue/Smear
- Fasting
- No
- Unit
- Bacteriological Index (BI)
Function
An Acid-Fast Bacilli (AFB) skin clip or slit-skin smear is a specialized microbiological test used to detect bacteria that have waxy cell walls, making them resistant to standard Gram staining. This test specifically looks for organisms like Mycobacterium leprae (the cause of leprosy) or other atypical mycobacteria.
Why it is Ordered
This test is ordered when a patient presents with suspicious skin lesions, localized loss of sensation, or thickened nerves. It is the gold standard for classifying and monitoring the treatment of Leprosy (Hansen's Disease). The 'clip' or 'smear' involves taking a small sample of tissue fluid from the dermis of the earlobes or the lesion itself.
Associated Conditions
- Leprosy (Hansen’s Disease): Categorized into paucibacillary (low bacterial load) or multibacillary (high load) based on the AFB results.
- Buruli Ulcer: Caused by Mycobacterium ulcerans.
- Atypical Mycobacterial Infections: Chronic skin infections that do not respond to standard antibiotics.
Monitoring
The test is repeated periodically during multi-drug therapy (MDT) to ensure the Bacteriological Index is decreasing, indicating successful treatment.
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 skin clips can be low in paucibacillary leprosy, meaning a negative result does not definitively rule out the disease. Sampling technique is critical; if the clip is too superficial, it may miss the bacilli residing deeper in the dermal tissue. Histopathology (biopsy) is often required for 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.
Clinical References
Source-of-truth databases and clinical guidelines for Skin Clip For A.F.B. (Acid-Fast Bacilli):
Official Sources
- Leprosy (Hansen's Disease) 2025 Case Definition | CDCndc.services.cdc.gov
Research & Guidelines
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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