Diagnosis of leprosy The 3rd Cardinal sign

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Presentation transcript:

Diagnosis of leprosy The 3rd Cardinal sign Salvatore Noto, Pieter A M Schreuder Leprosy mailing list, May 2010 leprosy mailing list 1

The 3rd cardinal sign of leprosy “Positive slit-skin smear” leprosy mailing list 2

The slit and scrape method Technique of smear-taking from the ear lobe Warning: the use of gloves is advised Courtesy of B. Naafs

The slit and scrape method Technique of smear-taking from the ear lobe 4 Courtesy of E Nunzi and A Clapasson leprosy mailing list

The slit and scrape method blade is then turned through 90 degrees Warning: the use of gloves is advised Courtesy of B. Naafs

Technique of smear-taking Courtesy of E Nunzi and A Clapasson leprosy mailing list 6

4. Stain (Ziehl-Neelsen) 1. Smear 2. Dry 3. Fix 4. Stain (Ziehl-Neelsen) Courtesy of E Nunzi and A Clapasson leprosy mailing list 7

Morphology Solid (S) Granular (G) Courtesy of A Clapasson leprosy mailing list

Courtesy of A Clapasson Granular (G) Fragmented (F)

Bacteriological index (BI) = 4.83 + Morphological index (MI) = 6.1 % Leprosy (LL) Bacteriological index (BI) = 4.83 + Morphological index (MI) = 6.1 % left right Courtesy of S. Noto leprosy mailing list

Leprosy (LL) = 4.7 + = 26.4 % Bacteriological index (BI) Morphological index (MI) = 26.4 % Courtesy of S. Noto leprosy mailing list 11