BACILLI JN LEPROUS LESIONS. 255 



bers in the leprous lesions, especially in the tubercular 

 form. In fact, so numerous are they that the granulation 

 tissue in sections, properly stained as above, presents quite 

 a red colour under a low power of the microscope. The 

 bacilli occur for the most part within the protoplasm of the 

 round cells of the granulation tissue, and are often so 



FlG. 64. Superficial part ol leprous skin, showing the cells ot the 

 granulation tissue filled with bacilli (stained darkly). In the upper part 

 a process of epithelium is seen. 



Paraffin section ; stained with carbol-fuchsin and Bismarck -brown, 

 x 500. 



numerous that the structure of the cells is quite obscured 

 (Fig. 64). They are often arranged in bundles which con- 

 tain several bacilli lying parallel to one another, though the 

 bundles lie in various directions (Fig. 65). The appearance 

 thus presented by the cells filled with bacilli is very character- 

 istic. Bacilli are also found free in the lymphatic spaces, 



