SWINE FEVER. 



357 



have recovered from swine erysipelas is also antitoxic, and will 

 produce immunity in other animals. The treatment introduced 

 by Lorenz is to inject serum in the proportion of 1 cc. to every 

 10 kilogrammes of the weight of the animal's body. Two days 

 afterwards -5 to 1 cc. of virulent culture is injected, and after 

 twelve days the dose is doubled. Lorenz inoculated 294 pigs ; 

 12 were suffering from swine erysipelas, and 

 of these 6 recovered and 6 died. 



In the opinion of the author this disease 

 requires re-investigation, for if it be true that 

 rouget or schweinrothlauf is associated with 

 ulceration of the intestines, the recognition 

 of it as a disease distinct from our English 

 swine fever apparently rests upon the pres- 

 ence of a bacillus, which cannot be distin- 

 guished from the bacillus of mouse septicaemia. 

 The question arises whether this bacillus 

 is really the cause of a distinct disease, swine 

 erysipelas, or, on the other hand, whether 

 the bacillus is really the bacillus of mouse 

 septicaemia which has been isolated from 

 certain cases of swine fever. The bacillus of 

 mouse septicaemia is widely distributed, and 

 it may only be an accidental concomitant in 

 rouget or schweinrothlauf. The presence of 

 the bacterium of haemorrhagic septicaemia in 

 both rouget and pig typhoid would not prove 

 identity, as this micro-organism is un- 

 doubtedly only secondary in both diseases. 

 There is great need, therefore, for further 

 careful investigation. Clinical and patho- 

 logical observations must be made in this 

 country, to determine whether there are 

 really two diseases included under the name 



" swine fever." If this prove to be the case, we must ascertain the 

 clinical and pathological differences between rouget and pig typhoid. 

 How can rouget be distinguished from cases of swine fever in which 

 there is a patchy rash, paralysis of hind legs, but no ulceration of the 

 intestine ? Further, how is swine erysipelas with ulceration of the 

 intestine and ileo-ccecal valve to be distinguished from an ordinary 

 case of pig typhoid ? 



FIG. 144. PURE-CULTURE 

 IN NUTRIENT GELA- 

 TINE OF BACILLI 

 IN SWINE ERYSIPELAS 

 (BAUMGARTEN). 



