2i8 Veterinary Medicine. 



a transparent envelope. It stains in aniline colors but not by 

 Gram's method. It is aerobic and ^rows in gelatine at ordinary 

 temperature without liquefying it, and in stick cultures forms a 

 line of small, white, separate colonies which do not coalesce by 

 growth. Does not grow on the surface of the gelatine around 

 the puncture. Line cultures on agar are in colonies like minute 

 transparent droplets. In bouillon it develops long chains. 



Inoculated on the rabbit, Guinea pig and mouse, it produced 

 death with pneumonic affections (hsemorrhagic congestion or in- 

 flammation), but it failed to take in some of the rabbits and Guinea 

 pigs. Chickens and pigs proved immune. Injected into the 

 horse's lung or as .spray into the trachea it produced true croup- 

 ous pneumonia. Fiedaler and others obtained similar results. 

 Peter has found the faeces of pneinuonic horses virulent, an im- 

 portant point in connection with disinfection. 



Schiitz found that 20 grammes of the culture, in an equal 

 quantity of boiled water, injected into the horse's trachea, pro- 

 duced a rise of temperature by two or three degrees, with rigors, 

 cough, accelerated pulse, elevated temperature, dyspncEa and 

 prostration, but that this subsided in a few hours. By repeating 

 this every thirty-six hours, the fourth or fifth would fail to pro- 

 duce a reaction and the subject proved immune. 



Cadeac's Diplococcus Pneumonia Equina. In the lungs 

 of cases of contagious pleuro-pneumonia of the horse Cadeac found 

 a round noncapsulated coccus appearing in pairs, or rarely in 

 chains, and staining by Gram's method. It grew slowly in 

 bouillon and agar at 37° C, forming on the latter in twenty-four 

 hours, a thick, whitish, oily drop, which, as it grew larger, as- 

 sumed a ."^ilvery whiteness, and dried in the centre. In bouillon 

 it precipitated a powdery sediment. The reaction of the culture 

 medium was unchanged. It lost virulence rapidly in artificial 

 cultures or by a heat of 50° C. , and it died in ten minutes at a 

 temperature of 60° C. Virulence vfz.9, long retained whtn dried, 

 or even in putrid material. 



This proved infecting to the ass, rabbit and Guinea-pig, while 

 the cat and white rat proved immune. Intratracheal injection 

 of the dog produced a transient pneumonia. The ass inoculated 

 with the blood of the infected rabbit died in three days, with a 

 hepartzed lung, pleurisy, and swarms of the microbes in the lungs, 



