



They form a vermilion layer on 

 potato. 



They were isolated by Koch in 

 India from the intestinal contents 

 of an ape. 



Bacillus indigogen.es (Alvarez). 

 Rods 3 p. in length and 1-5 /* in 

 width, singly, and in chains : cap>u- 

 lated. 



On agar they produce a yellow Uh- 

 white layer, and are said to develop 

 an indigo-blue colour in infusions 

 of leaves of the indigo plant. 



Intravenous injections in guinea- 

 pigs are said to produce death in a 

 few hours. 



They were isolated from the 

 leaves of the indigo plant. 



Bacillus indigonaceus (Clas- 

 sen). Rods 1'6 to 3 n long, '8 to 

 9 /i wide ; non-motile. 



They form a sky-blue layer on 

 the surface of gelatine. 



On potato the growth is dark- 

 blue, and later has a metallic lustre. 



Bacillus indigoferus, which was 

 found in water at Kiel, is only 

 to be distinguished by its motility. 



Bacillus inflatus (A. Koch). 

 Rods 4'6 to 5 - 5 //. in length, '6 to 

 !* \i in width, and filaments. 



The colonies send out delicate 

 processes. 



The bacilli inoculated in the 

 depth of gelatine send out line 

 filaments in the track of the needle 

 followed by slow liquefaction. 



On agar they form a shining 

 brownish layer. 



In broth a pellicle forms on the 

 surface. 



They occur in the air. 



Bacillus inunctus (Pohl). 

 Rods 3'5 p. in length, '8 to -9 /* in 

 width. 



Inoculated in the depth of gela- 

 tine they grow both in the track of 

 the needle and on the surface ; 

 liquefaction follows in time. 



On agar they form a whitish 

 growth. 



They were isolated from the 

 water of marshes. 



Bacillus invisibilis (Vaughan). 

 Rods ; motile. 



The colonies are irregular and 

 yellowish. 



lno-nl;ited 111 tli.- .1. -;,tl, of 



tine they grow both in tl, 

 the needle and on th. 

 I On agar they form a whit. 

 growth. 



<>n potato they develop an 



visilile l;i\ 



They occur in wai 



Bacillus iridescens 

 Rods from ii . 

 and threads. 8] 

 sent : slightly n,. 



The colon; 



appearance recall in. 

 convolution : tin. 



Inoculated in tin- 

 tine then 



point of puncture. anl 

 like growth 

 track. 



On agar the\ 

 even, moi- 

 cent growth, with a pitted -in: 



Blood s-nim i> li-pi 



On potato t! M.'k. 



dark yellow growth like h< 



Broth : 

 there 



onii.i in v. 



Bacillus lactis aerogenes 



cherich).- ; r:<l thick. 



!. and 1 to 

 with rounded end- : n-iia! 



heaps. Non-m 

 tion not <! 



at :;; 



Colonies on ti 

 moist, >hinini: and p 



UfloW til. 



yellowish iin.-l' 



Inoculat, -rela- 



tine tin- r..d- f..nn 

 nail-shaj.ed gro* 

 cnltnn- i- ''"in; 

 :mil bnbb:- 

 colonie- n -luce 



On blood sei nin there is a raised, 



lU'.i-t, -hllllD'J. "(lit- _'l" 



In milk ' grape ugar 



M.liitinn- th-y prodooi | 



Injc.-t.-d siil- 

 death in : 

 and the bacilli an 

 blood and ii t i rial organs. 



