520 



DESCRIPTION OF SPECIES. 



They were found in the intestinal 

 tract of animals fed with milk and 

 of infants at the breast. 



Bacillus lactis albus (Loffler). 

 Rods, 3*4 JJL in length, '90 p. in 

 width, and filaments. Spore-forma- 

 tion present. 



Inoculated in the depth of gela- 

 tine they slowly liquefy the upper 

 part, and a white scum forms on the 

 surface. 



On agar they form a white layer. 



On potato the growth is dry and 

 white. They coagulate milk. 



They occur in milk. 



Bacillus lactis erythrogenes 

 (Hueppe).- Short rods, 1 to 1*4 /* 

 in length and - 3 to "5 p in width, 

 and filaments. Colonies small and 

 circular ; greyish-white ; later yel- 

 low and surrounded by liquefied 

 gelatine with a pink tinge. 



In the depth of gelatine the 

 growth in the track of the needle 

 is scanty, but on the surface a 

 whitish patch forms which after- 

 wards turns yellow, and the gela- 

 tine is coloured pink. Later lique- 

 faction sets in, and the liquefied 

 gelatine is turbid and pink. 



On agar a shining yellow layer 

 develops, and the same on potato. 



In broth the bacilli produce tur- 

 bidity, and they coagulate milk. 



They occur in " red milk." 



Bacillus lactis pituitosi (Lof- 

 er). Rods slightly bent. 



Colonies circular, greyish-white. 



On agar and potato they pro- 

 duce a greyish-white layer. 



They render milk viscid. 



They occur in milk. 



Bacillus later iceus (Adametz 

 and Eisenberg). Rods and fila- 

 ments. 



Colonies circular, granular, red- 

 dish-brown. 



In the depth of gelatine there is 

 a scanty growth along the track 

 of the needle and a brick- red 

 growth on the surface. 



On potato the growth is also 

 brick-red. 



They occur in water. 



Bacillus leporis lethalis (Gibier 

 and Sternberg). Rods 1 to 3 /* in 

 length, -5 p. in width. 



Colonies transparent and with 

 the appearance of broken glass. 



In the depth of gelatine there 

 is a growth along the track of the 

 needle with a conical area of lique- 

 faction at the upper part, and a 

 white sediment. 



On agar they form a trans- 

 lucent film. They liquefy blood 

 serum. 



On potato the growth is pale- 

 yellow. 



Cultures injected into the peri- 

 toneal cavity of rabbits are toxic. 



They were isolated from the in- 

 testinal contents in cases of yellow 

 fever. 



Bacillus leprsB (p. 407). 



Bacillus leptosporus (L. Klein). 

 Rods resembling hay-bacilli, 

 singly, in chains and long twisted 

 filaments. 



The spore-membrane is said to 

 form part of the newly grown 

 bacillus, and the filaments are de- 

 scribed as possessing peculiar spas- 

 modic movements. 



They were isolated from a con- 

 taminated culture. 



Bacillus limbatus acidi lactici 

 (Marpmann). Rods short, thick ; 

 singly, in pairs ; capsulated. 



Colonies white. 



In the depth of gelatine they 

 develop slightly in the track of the 

 needle, and produce a white patch 

 on the free surface. 



In milk they produce coagula- 

 tion and lactic acid. 



They occur in milk. 



Bacillus limosus (Russell). 

 Rods 3 to 4 p. in length, 1/25 /u, in 

 width ; singly, in pairs and chains ; 

 spore-formation present. 



Colonies transparent, surrounded 

 by filamentous processes. 



In the 'depth of gelatine pre- 

 pared with sea-water, liquefaction 

 occurs rapidly in the track of the 

 needle, and a deposit forms at 

 the bottom and a thin skin on the 

 surface. 



On agar they form a white layer, 

 and in broth turbidity and a thick 

 scum. 



On potato the growth is greyish- 

 white. 



