XI. B, 5 Boynton: Rindei-pest in Swine 261 



In summing up the results of these experiments, it will be noted 

 that pigs that have been hyperimmunized to hog cholera can 

 contract rinderpest when exposed to cattle sick with rinderpest. 

 These results prove that there is no immunity conferred against 

 rinderpest by the hog-cholera virus, although the animals ran 

 a milder course of the disease than has been usually witnessed 

 in the laboratory. This condition may be considered from two 

 viewpoints: First, that possibly the strain of rinderpest virus 

 was not very virulent ; and secondly, that the hyperimmunization 

 against hog cholera may have increased the resistance toward 

 rinderpest. 



CONCLUSIONS 



1. From the results obtained in experiments 1 to 10, inclusive, 

 it is proved that pigs can contract rinderpest when exposed to 

 cattle sick with rinderpest. The disease thus contracted by 

 pigs may terminate in death, unthriftiness, or complete recovery. 



2. From the results obtained in experiments 11 to 13, inclusive, 

 it is proved that pigs can contract rinderpest when exposed to 

 pigs sick with rinderpest. 



3. From the results obtained in experiment 14 it is proved that 

 a pig can contract rinderpest from pigs sick with rinderpest by 

 means of the caretaker. 



4. From the results obtained in experiments 15 and 16 it is 

 proved that pigs can contract rinderpest when inoculated with 

 blood drawn from pigs sick with rinderpest. 



5. From the results obtained in experiments 17 to 20, inclusive, 

 it is proved that pigs can contract rinderpest when inoculated 

 with blood drawn from cattle sick with rinderpest. 



6. From the results obtained in experiment 21 it is proved that 

 a pig can contract rinderpest when inoculated with mixed blood 

 drawn from cattle and pigs sick with rinderpest. 



7. From the results obtained in experiment 22 it is proved 

 that a pig can contract rinderpest when it is drenched with blood 

 drawn from carabaos sick with rinderpest. 



8. From the results obtained in experiments 23 to 28, inclu- 

 sive, it is proved that cattle can contract rinderpest when exposed 

 to pigs sick with rinderpest. However, cattle do not contract 

 the disease very readily by this method, and the exact reason 

 for this has not been ascertained at the present writing. 



9. From the results obtained in experiments 29 to 32, inclu- 

 sive, it is proved that cattle can contract rinderpest when inoc- 

 ulated with blood drawn from pigs sick with rinderpest. 



