BACILLI 207 



Bacillus Pluorescens Non-liquefaciens. This organism occurs as 

 delicate, short, lively motile rods. The colonies on gelatine possess a 

 glittering appearance like mother-of-pearl, and also exhibit a greenish 

 fluorescence. 



On Agar-Agar a greenish-coloured growth occurs. Another form is 

 described, the Bacillus fluorescens non-liquefaciens immobilis, which is 

 distinguished by its non-motility and the absence of flagella. 



Bacillus Puscus. Medium-sized rods, which are often curved, and 

 owes its name to the dark brown-coloured pigment it produces in all the 

 media. 



In Gelatine Stab Cultures the growth is nail-like at first, the head 

 finally spreading out. 



Bacillus Rubefaciens. Fine rods, united in two or more joints. 

 The growth in gelatine presents a pale rose-red colour. 



On Potatoes the substratum is rose coloured, while the colonies them- 

 selves vary in colour from a yellowish-grey to a brownish-red. 



Bacillus Subflavus. This organism occurs in rods, often associated 

 in clusters, and are two to four times as long as broad. The cultures 

 form a pale yellow pigment, which in plate cultures shines like mother- 

 of-pearl. The pigment is more apparent in agar-agar cultures. 



Bacillus Brunneus. Small non-motile bacillus. In characteristic 

 cultures the medium surrounding the growth exhibits a diffuse brown 

 colour. 



(b.) NON-CHROMOGENIC. 



Bacilli resembling Typhoid Bacilli (Weichselbaum). This is a 

 group of motile bacilli which in their morphological and culture 

 characteristics resemble the bacillus of Eberth and Gaffky, and the 

 Bacterium coli commune. 



On Plate Cultures the growth is similar to the typhoid and coli 

 commune colonies. 



On Potatoes the growth is sometimes brown, sometimes yellow, and 

 sometimes scarcely visible. 



Milk is coagulated. 



Grape Sugar is fermented by some forms, and by others it is not. 



The Nitroso indol reaction is sometimes positive, sometimes negative ; 

 but the pathogenic effects on experiment animals is awanting. That 

 this group contains a number of different organisms is shown by the fact 

 that it is not possible with any of these species of bacteria to produce 

 immunity against a second species. Also in experiments with the blood 

 serum of animals, rendered immune against one of these species, the 

 power of causing agglutination in the culture of another species was 

 always absent. 



