BACILLI 425 



BACILLUS FLUOEESCENS LONGUS 



Authority. — Zimmermann, Die Bakterien unserer Trink- und Nxttzwdsser, 

 insbesondere des Wassers der Chemiiitzer Wasserleitung, Chemnitz, 1890. 



Where Found. — In the Chemnitz water supply. 



Microscopic Appearance. — Bacillus of very variable dimensions, longer and 

 shorter, straight and bent rods, all occurring together, as well as semicircular 

 or wavy threads. The bacillus itself is about 0-83 /j. broad ; the length of the 

 shortest individuals is from 1-45 to 1-65 /i, the longest forms reach 14 /j, and 

 more. Is coloured by Gram's method. The shorter bacilli are very motile, 

 the longer threads are stationary. Light unstained spots observed in the rod, 

 but it is doubtful if they are spores. 



Cultures. — 



Gelatinb Plates. — The colonies in the depth are small greenish white 

 dots, whilst on the surface they form almost circular smooth expansions with 

 a mother-of-pearl iridescence. They extend rapidly (in three days they reach 

 often 9 mm. across) and are yellowish green in colour, and look as if yellow 

 white threads had been drawn through them. Under a low power the depth 

 colonies are sharply defined and yellowish in colour, whilst the contents have 

 a convoluted and banded appearance. Similar convolutions are visible in the 

 surface colonies, but the bands are broader and resemble the convolutions in 

 the intestine of a small animal. No liquefaction takes place. 



Gelatine Tubes. — Forms a thin but afterwards thicker expansion, at first 

 blue, but later of a blue green fluorescent colour. 



Agak-agab. — The agar becomes greenish yellow, and only a moderately 

 thick expansion is seen. 



Potatoes. — Forms a. moist, shining, thin expansion, yellowish in colour, 

 which extends over nearly the whole surface. 



BACILLUS FLUOEESCENS NON-LIQUEFACIENS 



Authority. — Eisenberg, Bakteriologische Diagnostik^ 1891, p. 145. 



"Where Found. — In water. This is doubtless the same organism which was 

 subsequently isolated from water and described by Adametz as Fluorescirendes, 

 Uaugrilnes Bacterium {Mitth. d. osterr. Versuchsstat, Heft 2, 1888). 



Microscopic Appearance.— Short fine bacilli with rounded ends. It is not 

 motile. 



Cultures. — 



Gelatine Plates. — The surface colonies resemble fern-leaves, with a 

 mother-of-pearl opalescence extending to some distance. No liquefaction takes 

 place. 



■Gelatine Tubes.- Grows very slightly along the needle's path in the depth, 

 and produces on the surface a fluorescent shimmer. 



Agar-agae. — Forms a surface expansion producing a green colour. 



Potatoes. — Grows rapidly, forming a diffused brownish growth ; the surface 

 assumes a bluish grey colour. 



Bemarks. — It is strictly aerobic. 



