258 The Philippine Journal of Science wie 



with hog cholera; this was thirty-six days after it had recovered 

 from rinderpest. 



June 1, 1916, pig 273 presented a rise in temperature. 



June 10-15, E. L. 



June 16-19, N. E. 



June 20, D., E. L. 



June 21-23, E. L. 



June 23, this animal was killed and upon autopsy presented 

 good lesions of hog cholera. 



Pig 292 recovered from rinderpest May 9, 1916. 



May 17, 1916, this animal was exposed to the four pigs sick 

 with hog cholera ; this was eight days after it had recovered from 

 rinderpest. 



May 30, 1916, pig 292 presented a rise in temperature. This 

 animal ran a mild course, was killed on June 23, and presented 

 a few lesions of hog cholera upon autopsy. 



From the results obtained in the preceding experiment, it will 

 be noted that pigs that have recovered from rinderpest are 

 susceptible to and can die of hog cholera, which proves that there 

 is no immunity toward hog cholera conferred upon a pig that 

 has recovered from rinderpest. 



PIGS HYPERIMMUNIZED TO HOG CHOLERA AND LATER CONTRACTING 



RINDERPEST 



The following experiments were designed to ascertain whether 

 pigs that had been hyperimmunized against hog cholera would 

 contract rinderpest when exposed to cattle sick with rinderpest. 



EXPERIMENT 43 



Pig 1. — This animal received its last injection of 450 cubic 

 centimeters of virulent hog-cholera blood on October 15, 1914. 

 November 16, 1914, pig 1 was exposed to bull 3845. 



History of bull 3845: 

 ! November 9, 1914: Inoculated with 200 cubic centimeters of viru- 



lent blood from bull 3780. 

 November 11: Bull 3845 presented a rise in temperature. 

 November 11-16: D. 

 No. 17-18: D., N. E. 

 November 19: Died of rinderpest. 



November 20, pig 1 presented a rise in temperature, register- 

 ing, in the morning, 39.8° C. ; in the afternoon, 41.9° C. 

 November 22-^27, N. E. 



