Case 165. Lepromatous leprosy (35 y-o M)

       
  Biopsy from erythematous and scaling nodules on the extremities of a Paraguaian Nisei  
       

 

  When the deparaffinization is done in a routine way, acid-fastness of M. leprae is markedly diminished (Ziehl-Neelsen, regular method). Compare the result with the Fite's variation.