XI, B, 5 



Boynton: Rinderpest in Swine 



248 



In experiment 23 it will be noted that bull 3908 and pig 186 

 (experiment 11) were exposed in the same corral and at the same 

 time to pig 185 and that pig 186 contracted the disease but the 

 bull was unaffected. It will also be noted that bull 3840 (ex- 

 periment 29) was inoculated with blood from pig 185 on May 

 27 and contracted rinderpest from this blood, which proves that 

 the blood of pig 185 was virulent when bull 3908 was exposed 

 to it. It will also be noted that bull 3908 was exposed to pig 

 186 through the entire course of the disease, including the in- 

 cubation period, and remained unaffected. Finally it will be 

 noted that bull 3908 was inoculated with virulent rinder- 

 pest blood which was taken from bull 3840 and that bull 3908 



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Fig. 5. Temperature chart of cow 3995 exposed to pig. 



contracted rinderpest from this inoculation and died. Thus, 

 by inoculation, bull 3908 was killed with the same virus to which 

 it had been exposed in pig 185 without effect. 



In experiment 24 bull 3924 was either naturally immune to 

 rinderpest, a condition of rare occurrence, or it contracted a very 

 mild type of disease from the exposure to pig 207 and thereby 

 developed an active immunity, since it was unaffected by sub- 

 sequent inoculations of virulent rinderpest blood. 



In experiment 25 it will be noted that bull 3935 and pig 212 

 (experiment 12) were exposed in the same corral and at the 

 same time to pig 208 and that pig 212 contracted the disease 

 but bull 3935 remained unaffected. It will also be noted that 



