XIV 



BACILLUS TUBERCULOSIS 



363 



are stiff rods about 4 to Sjjl long and less than i/t thick. 

 They are pointed at their ends, and always occur in masses 

 within the large leprosy-cells of the leprous tubercles of the 

 skin and internal organs. But they are also present in the 

 interstitial tissue of the nervous branches in the ansesthetic 

 variety of the disease.^ Some bacilli are motile, others 



Fig. 143. — From a Section through the Larynx of a Patient dead of 

 Leprosy. 



Huge cells in fibrous connective tissue ; the cells are filled with the leprosy bacilli. 

 Magnifying power 600. (Stained with magenta and vesuvin.) 



not ; some are more or less granular and beaded, owing 

 to local collections of the protoplasm within their sheath. 



Cover-glass specimens made from a scraping of a leprous 

 nodule or the discharge of a leprous ulcer by spreading out 



' Compare also Covnil, C'nion Mddicale, 1881, Nos. 178, 179, and 

 Babes, Archives de P/iysiologie, July, 1883. 



