218 The Philippine Journal of Science 1916 



cattle or carabaos. Also virulent blood from hogs mixed with 

 virulent blood from cattle or carabaos had a tendency to activate 

 the virus. 



In a personal conversation Prof. Dr. T. Horiuchi, of the 

 Bacteriological Institute of Formosa, informed me that he 

 had seen pigs infected with rinderpest in that island. In his 

 experience it was of rare occurrence that cattle became infected 

 from pigs. 



PIGS EXPOSED TO CATTLE SICK WITH RINDERPEST 



The following ten experiments were designed to furnish in- 

 formation regarding the possibility of pigs contracting rinder- 

 pest through contact with cattle sick with the disease. 



These exposures were conducted in two stalls, which will be 

 designated as stall No. 1 and stall No. 2. These stalls were 

 10 feet long by 12 feet wide. Stall No. 1 had a cement floor, 

 and stall No. 2 had a wooden floor. The sick cattle were tied 

 in these stalls, and the pigs were unrestrained during the 

 exposures. 



All the animals used in these experiments were kept in quar- 

 antine for a certain length of time, which will be stated in 

 each case. While in quarantine their temperatures were taken 

 twice a day, morning and afternoon, and each day their general 

 physical condition was noted. 



The following abbreviations will be used in connection with 

 the data on the experiments: D., diarrhoea; E. L., eating little; 

 N. E., not eating; D., E. L., diarrhoea, eating little; D., N. E., 

 diarrhoea, not eating; V. B., virulent blood. 



EXPERIMENT 1 



Pig 185. — Known history prior to the experiment: This ani- 

 mal was a native pig, 7 months old, purchased in Manila, and 

 placed in quarantine at the laboratory March 2, 1915. On May 

 2, 1915, it was inoculated with 50 cubic centimeters of blood 

 from a pig suffering from hog cholera. This blood had been 

 passed through a Berkefeld N. filter. The animal developed 

 a mild form of hog cholera and recovered. 



May 21, 1915, pig 185 was exposed to bull 3906 in stall No. 1. 

 This exposure was continued for three days. 



History of bull 3906 during the exposure: 



May 21 : Fifth day after the initial rise in temperature. 

 May 21-23: D., N. E. 



May 24: Died of rinderpest, presenting tjrpical lesions of that 

 disease upon autopsy. 



