﻿IX, B, 1 



Ward et al.: Transmission of Rinderpest 



57 



March 20, 1912. At 2 p. m. the 4 sick animals were removed. The 

 weather was cloudy, windy, and slightly cool. 



March 21. Bull 3342 was placed in the corral after having been de- 

 prived of food and water during the forenoon. It immediately began to 

 eat soiled fodder left by the sick, and drank from the supposedly con- 

 taminated watering trough. 



March 22. Showers occurred during the forenoon and afternoon. The 

 weather was hot and windy. Bull 3344 was placed in the corral at 2 p. m., 

 hungry and thirsty. 



March 23. Bull 3361 was placed in the corral at 2 p. m., and imme- 

 diately began eating and drinking as had the others. On this day the 

 sky was clouded. 



March 28. Bulls 3342, 3344, and 3361 were removed on this date and 

 placed in stalls isolated from infection. 



None of the cattle contracted rinderpest from exposure in the 

 corral, but their susceptibility was proved by attack after suit- 

 able exposure at a later period. The chief details of the exper- 

 iment appear in Table VI. 



Table VI. — Exposure of susceptible cattle to supposedly infected corral. 



Animal No. 



Interval 

 between 

 removal of 

 sick and 

 exposure 

 of sus- 

 ceptible 

 animal. 



Time of 

 exposure 

 in corral. 



Result. 



Susceptibility 

 test later. 



Days. 



3342 1 



3344.... 2 



3361 3 



Days. 

 7 

 6 

 6 



Negative . _ _ 



do 



do 



Susceptible. 

 Do. 

 Do. 



As usual, no evidence was produced to show that the sick 

 animals left the corral infective for even a day. 



Experiment 7. — This experiment was essentially a duplication 

 of the two preceding ones except that the ground in the corral 

 was kept moist by sprinkling, in order to simulate conditions 

 caused by wet weather. The same corral was employed as be- 

 fore. Three bulls, all infected with rinderpest, had been kept 

 in the corral. On the day that they were removed, the disease 

 in bull 3122 had reached a stage corresponding to the eleventh 

 day after inoculation and eighth after initial rise of temperature; 

 in 3366, the twelfth after inoculation and seventh after tem- 

 perature rise. Bull 3300 died the day before, which was the 

 ninth day after inoculation and fifth after rise of temperature. 

 This one had been in the corral two days; 3122, seven days; 

 and 3366, eleven days, since inoculation. 



