XI.J 



BACILLUS : PATHOGENIC FORMS. 



91 



of bacilli having the appearance of a dense phalanx advancing 

 upon the healthy tissues. The disease has been proved capable 

 of transmission (to the rabbit and mouse) by injection of the 

 bacilli in question, which are equally numerous and viral ent 

 after passing through several generations by inoculation." 

 The disease often ends fatally in calves. 



Fio. 55. FROM A SECTION THROUGH TONGUE OF CALF, ULCBRATIVE STOMATITIS. 



1. Muscular fibres. 



2. Inflamed tissue. 



3. Bundles of the bacilli. 

 Magnifying power 700. (Stained with magenta.) 



The best method of staining the bacilli was found to be 

 this : The sections, both those prepared from the ulcerations 

 of the calf s tongue and from the inoculated tissues of the 

 rabbit, are immersed in a mixture of magenta and methyl-blue, 

 then washed in spirit, and after clarifying in clove-oil are 

 mounted in Canada balsam solution. The bacilli are stained 

 deep pink, the inflamed tissue blue. The bacilli appear as 

 thin rods in rows, thus forming a leptothrix-like growth. In 



