SWINE PLAGUE. 313 



The condition of tiie blood differs in a marked degree from 

 that of anthrax, being fibrinous, red in colour, and as a rule 

 contains neither bacilli nor the contagium of the disease. 



The experiments of Klein point to the conclusion that — " 1st. 

 The fresh blood of diseased animals does not, as a rule, contain 

 the virus, as it fails to produce the disease when introduced into 

 a healthy animal. 



" Tour animals were inoculated (at different times) with the 

 fresh blood of diseased animals. They remained healthy. When 

 subsequently inoculated Avitli vii'us-containing matter, they be- 

 came smitten with the disease. 



" In a fifth instance, however, fresh blood did produce infection. 

 [And this same blood proved active after having been kept 

 sealed up in a capillary tube for several weeks.] This blood 

 was obtained from a very severe case with copious peritoneal 

 exudation ; in which were found peculiar, abnormally large, 

 coarsely granular cells; the same cells were also present in 

 the blood ; so that it appears probable that the blood became 

 charged, by absorption during life, with matter from the peri- 

 toneal exudation. This latter always contains the virus in an 

 active state. 



" 2. Experiments showiDg that fluid as well as solid lymph 

 of the diseased peritoneum contains the virus in a very active 

 state. 



" Six successful inoculations with fluid peritoneal exudation. 



" There is no difference of activity to be noticed between fresh 

 exudation and one that had been kept sealed up in a capillary 

 tube for several weeks. 



" Solid lymph obtained from the peritoneal cavity of diseased 

 animals, having been dried at a temperature of about 38° C, 

 proves very active. 



" 3. Experiments showing that parts of the diseased lung, 

 ulcerated intestine, and also diseased spleen, contains the virus 

 in an active state. Diseased parts of lung or intestine that were 

 dried at a temperature of about 38° C, retain their virulence 

 unaltered. 



" In all cases of pneumo-enteritis, the trachea as well as the 

 bronchi have frothy blood-containing mucous matter, possessed 

 of infectious properties. It must be therefore supposed that the 

 breath of a diseased animal is cliarged with the poison. On 



