TUBERCULOSIS. 335 



along the line of puncture and form a surface growth with 

 consecutive markings. The bacilli grow readily upon 

 agar, but not so readily on potato. 



The bacillus is fatal to mice, guinea-pigs, rabbits, and 

 hares about twenty days after inoculation. At the seat 

 of inoculation an abscess develops, the neighboring lym- 



Fig. 71. — Bacillus pseudo-tuberculosis from agar-agar; x 1000 (Itzerott and 



Niemann). 



phatic glands enlarge and caseate, and nodules resembling 

 tubercles form in the internal organs. The bacilli studied 

 by Pfeiffer were isolated from a horse supposed to have 

 glanders. 



