OTHER ACID-FAST BACILLI 279 



tubercles. The colonies, visible in thirty-six hours, are scale-like and of 

 ^ivyish-whitc colour (Fig. 84, a}. Moeller's bacillus II. was obtained 

 from the dust of a hay-loft. The colonies at first are moist and some- 

 what tenacious, but afterwards run together, and are of a dull yellowish 

 colour. The general results of inoculation resemble those of grass 

 bacillus I., but are less marked. Moeller also obtained a similar organism 

 from milk. He also discovered a third acid-fast bacillus, which ho 

 obtained from manure and therefore called the " Mistbacillus " (dung 

 bacillus). This organism has analogous characters, though presenting 

 minor differences. It also has pathogenic effects. 



Petri and Rabinowitch independently cultivated an acid-fast bacillus 

 from butter ("butter bacillus"), in which it occurs with comparative 



/* * 





FIG. 83. Moeller's Timothy-grass bacillus. c 



From a culture on agar. FIG. 84. Cultures of acid-fast bacilli 



Stained with carbol-fuchsin, and treated grown at room temperature, 



with 20 per cent, sulphuric acid. ( rt ) Moeller's Timothy-grass bacillus I. 



x 1000. (&) The Petri-Rabinowitch butter bacillus, 



(c) Bacillus of fish tuberculosis. 



frequency. The organism resembles the tubercle bacillus, although it is 

 on the whole shorter and thicker. Its lesions closely resemble tuber- 

 culosis, especially when injection of the organism is made into the 

 peritoneal cavity of guinea-pigs, along with butter, the method usually 

 adopted in searching for tubercle bacilli in butter. This organism 

 produces pretty rapidly a wrinkled growth (Fig. 84, b) not unlike that 

 of Moeller's grass bacillus II. Korn has also obtained, other two bacilli 

 from butter which he holds to be distinct from one another and from 

 Rabinowitch's bacillus. The points of distinction are of a minor 

 character. Other more or less similar bacilli have been cultivated by 

 Tobler, Coggi, and others. 1 



Another bacillus of considerable interest is Johne's bacillus or the 



i For further details on this subject, vide Potet, Etudes sur les bacilles dites 

 acidophiles. Paris, 1902. 



