516 



DESCRIPTION OF SPECIES. 



in great numbers in the blood and 

 internal organs. 



They were isolated from the 

 lymph of diseased frogs. 



Bacillus ianthinus (Bacterium 

 ianthinum Zopf, Bacillus violacems). 

 Slender rods, about four times 

 their width in length, with rounded 

 ends. They also form threads, and 

 are actively motile. Spore-forma- 

 tion present in the rods. 



The colonies occur as circum- 

 scribed liquefied areas, in the centre 

 of which is a collection of the 

 coloured growth. 



The bacilli inoculated in the 

 depth of gelatine produce a funnel- 

 shaped liquefaction, and a granular- 

 looking violet mass subsides to the 

 bottom. 



On agar-agar and potato a 

 beautiful violet growth rapidly 

 develops. The colouring matter is 

 soluble in alcohol. 



They were observed on pieces of 

 pigs' bladder floating on the surface 

 of water rich in bacteria. They 

 occurred only on the surface of the 

 bladder exposed to the air, and never 

 on the part under water. They occa- 

 sionally occur in common tap water. 



Bacillus implexus (Zimmer- 

 mann). Rods 2*5 p, in length, 

 1-15 p in width. Non - motile. 

 Spore-formation present. 



Colonies white, granular, develop - 

 ing in three days into masses of 

 interlacing white filaments. 



Inoculated in the depth of gela- 

 tine, a growth develops in the track 

 of the needle and fine filaments 

 penetrate the gelatine. The jelly is 

 liquefied, and a pellicle forms on 

 the surface, and there is a flocculent 

 deposit. 



On agar the growth is white, and 

 on potato yellowish-white. 



They occur in water. 



Bacillus in acne contagiosa in 

 horses (Dieckerhoff and Grawitz). 

 Short rods '2 /u, in diam. 



Inoculated in the depth of 

 nutrient gelatine they form a scanty 

 growth in the track of the needle 

 and a white patch on the free sur- 

 face. They thrive best on blood 

 serum and on agar. 



The bacilli inoculated on the 

 surface of the skin of horses, calves 

 and other animals are said to pro- 

 duce acne pustules. Inoculated 

 subcutaneously in guinea-pigs they 

 produce a fatal result in twenty- 

 four hours. 



They were isolated from pus 

 in cases of acne contaf/iosa in horses. 



Bacillus in cancer (Koubasoff). 

 Rods ; spore-formation present. 



Inoculated in the depth of gela- 

 tine an irregular filament develops 

 in the track of the needle and a 

 transparent growth with central 

 depression on the surface. 



They are said to be pathogenic 

 in small animals, and to produce 

 nodules and ulcers of the mucous 

 membrane of the stomach. 



They were isolated from a case 

 of cancer of the stomach. 



Bacillus in cholera in ducks 

 (Cornil and Toupet), p. 230. 



Bacillus in choleraic diarrhoea 

 (Bovet). Rods 2 to 4 ^ in length, 

 1 to To ju, in width, singly and in 

 pairs, and filaments. 



In the depth of gelatine a filament 

 forms in the track of the needle and 

 a greyish transparent layer on the 

 surface. 



On agar a greyish film is formed. 



On potato the growth is yellowish 

 and abundant. 



Intra-peritoneal injections in 

 guinea-pigs cause peritonitis and 

 death. 



They were isolated from a case 

 of choleraic diarrhoea. 



Bacillus in diphtheritic disease 

 of calves (Bacillus vituloruiii 

 Lofner). Rods about five or six 

 times as long as wide, mostly united 

 in long threads. 



A piece of membrane from a diph- 

 theritic disease in a calf, placed on 

 blood serum developed a white layer 

 composed of the bacteria. Succes- 

 sive generations were not obtainable. 



Mice inoculated directly from the 

 calf died of a characteristic illness, 

 and the same long bacteria were 

 again found in the inoculated 

 animals accompanying widespread 

 infiltration, starting from the point 

 of inoculation. Inoculation of 



