424 APPENDIX. 



longer and thicker than those of fowl cholera, but the ends are somewhat 

 rounded as in that organism ; are usually grouped together in small masses. 

 Kills pigeons, sparrows, rabbits, and mice, but does not affect fowls, 

 guinea-pigs, rats, and dogs. 



(6) Bacillus of Diphtheria of Rabbits (der Darmdiphthene der Kanin- 

 chen). — In rabbits, as in pigeons, there has been described an organism 

 which grows in the " diphtheritic " processes of the intestine. On gelatine 

 plates is seen as small transparent grey colonies, which gradually become 

 brown ; the surface is finely granular, and has a peculiar pearly shimmer ; 

 growth in tubes along the track of the needle is comparatively slight, as the 

 organism requires a considerable amount of oxygen for its growth ; but on 

 the surface it forms a slowly growing whitish layer ; rods 3 to 4ju in length, 

 and I to i.4f( thick, rounded at the ends, arranged in pairs or in long 

 chains ; in rabbits causes an inflammatory exudation in the aUmentary 

 canal. 



j3 Cultivations give rise to a strong odour, 



(i) Bacillus urea. — Found in ammoniacal urine ; grows on gelatine 

 plates as small, semi-transparent points, which make their appearance on 

 the second day ; on the tenth day they are about the size of a sixpence. 

 These are described as having the appearance of a ground glass plate that 

 has been breathed upon ; the growth extends in the form of concentric 

 rings, the, outer one of which has a somewhat zigzag outline ; in gelatine 

 tubes it grows along the track of the needle very slowly as an exceedingly 

 delicate grey film ; on the surface it grows rather more rapidly, and in old 

 cultivations gives rise to a characteristic trimethylamine or herring brine 

 odour. The organism occurs as plump rods with rounded ends, 2/* in 

 length, and half as broad as long; it converts urea into carbonate of 

 ammonia. 



(2) Bacillus pyogenes fcetidus. — First obtained from a phlegmonous 

 abscess. Occurs in a very short time (24 hours) as white points, which 

 rapidly spread out as greyish- white films over the surface, and may gradually 

 become confluent ; the margins are usually somewhat more translucent 

 looking than the centre, which is thicker ; along the needle puncture in 

 gelatine are delicate, greyish-white points of various sizes, whilst on the 

 surface there is formed a layer similar to those described sis occurring on 

 plates ; the gelatine is not liquefied ; it becomes slightly opaque in older 

 cultures ; on potatoes, is seen as glistening light brown growth ; occurs as 

 short rods with rounded ends, about l.45;« in length, and .6/n in breadth; 

 sometimes in chains of two or more, and is slightly motile ; causes death of 

 mice and guinea-pigs, when injected into the abdomen, in about 24 hours ; 

 the bacilli are then found in the blood, but not at the point of inoculation ; 

 spores may be indistinctly made out in these bacilli. 



(3) Schottelius' intestine bacillus (Bacillus Coprogenesfatidus). — Found in 

 the intestinal canal and liverand spleen of pigs suffering from swine erysipelas. 

 This organism grows on gelatine as light yellow rounded deep colonies, 

 or as a fine transparent grey layer on the surface ; does not give rise to 

 liquefaction of the gelatine ; on potatoes it forms a dry, clear layer ; the 

 organism is about as thick as the hay bacillus (2^), but is only 4 or 5^ in 

 length ; it has rounded ends, and is motile ; the spores appear in distinct 

 rows along the course of the threads. It does not cause any affection in 

 pigs, and is only toxic in large doses to rabbits. 



