226 The Philippine Journal of Science i9i6 



carabaos, in which it varies between three and ten days, averag- 

 ing five days. 



Of the ten pigs used, two, or 20 per cent, died of rinderpest. 

 Four, or 40 per cent, recovered from the disease, but were un- 

 thrifty and were killed, although under normal conditions these 

 animals would undoubtedly have been allowed to live. Of these 

 four, one contracted hog cholera. Three, or 30 per cent, pre- 

 sented very mild symptoms, showing only a temperature reaction, 

 and recovered promptly ; these animals under normal field condi- 

 tions would hardly have been suspected of being sick. One, or 

 10 per cent, was bled to death for virulent blood, leaving the final 

 outcome as to the effect of the disease uncertain. 



These 10 pigs were exposed to 19 head of cattle sick with 

 rinderpest. Of these 19 sick cattle, 14, or approximately 73.7 

 per cent, died of rinderpest; three, or approximately 15.8 per 

 cent, recovered; two, or approximately 10.5 per cent, were bled 

 to death for virulent blood, leaving the final outcome as to the 

 effects of the disease uncertain. 



In comparing these figures, it will be noted that the mortality 

 in cattle was 73.7 per cent against 20 per cent in pigs and that 

 the recovery in cattle was 15.8 per cent against 70 per cent 

 in pigs when the mild cases and those that recovered but were 

 unthrifty are figured together. 



Thus it will be seen that rinderpest in pigs, when contracted 

 by exposure, presents a low mortality as compared with its 

 effect upon cattle. 



PIGS EXPOSED TO PIGS SICK WITH RINDERPEST 



The following experiments were designed to furnish infor- 

 mation regarding the possibility of pigs contracting rinderpest 

 by contact with pigs sick with that disease.. 



These exposures were conducted in two different corrals which 

 will be designated as corral No. 1 and corral No. 2. The di- 

 mensions of corral No. 1 were 14 by 30 feet, and of corral No. 2, 

 16 by 30 feet. Both corrals were built on the ground, and each 

 contained a small lean-to shed to protect the animals from the 

 weather. 



The sick pigs and those placed in the corrals to be exposed 

 were allowed the freedom of the place. 



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

 tine 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. 



