﻿IX. B, 1 



Wa7'd et al.: Transmission of Rinderpest 



59 



when they were taken out. The details of exposure in the corral 

 are described in the following notes : 



July 1, 1912. At 5 p. m. the sick animals were removed from the corral, 

 and bull 3298 was put in the corral at 5 p. m. 



July 2. At 5 a. m. bull 3298 was removed and isolated. Bull 3402 

 was placed in the corral at the same time. 



July 3. Bull 3403 was placed in the corral at 5 a. m. 



July 4. All animals were removed at 5 a. m. and placed in screened 

 stalls isolated from infection. 



Bull 3298, which was used as a control to demonstrate the 

 existence of infection in the corral just after the removal of the 

 sick, showed a rise of temperature on the sixth day, and died 

 on the twelfth day after exposure. None of the others, exposed 

 later, contracted the disease, but their susceptibility was proved 

 subsequently. The principal details of the experiment are shown 

 in Table VIII. 



Table VIII. — Exposure of susceptible animals in infected corral. 



Animal No. 



Interval 

 between 



removal of 

 sick and 



exposure 

 of sus- 

 ceptible 

 animal. 



Time of 

 exposure 

 in corral. 



Result. 



Susceptibility 

 test later. 



3298... 



8402... 



8403.- 



Hours. 

 None. 

 36 

 48 



Hours. 

 12 

 48 

 24 



Positive 



Negative ... 

 do 



Susceptible. 

 Do. 



No evidence was produced to show that the corral remained 

 infective for over twelve hours after the sick were removed. 

 The experiment in question was stronger than the preceding in 

 that the existence of infection left by the sick was demonstrated. 



Experiment 9. — This experiment was similar in character to 

 the last, and the same corral was used. Bull 3389 was used 

 to infect the corral, where it remained during the course of the 

 disease. The initial rise of temperature occurred on the fourth 

 day after inoculation and death on the seventh day. The periods 

 of exposure in the corral are shown in the following notes : 



June 27, 1912. Bull 3389 died and was removed at 8 a. m. The 

 weather was rainy and hot. Corral was left empty until the next day. 



June 28. Bull 3395 was placed in the corral at 8 a. m. 



June 29. Bull 3395 was removed from the corral at 8 a. m. and isolated 

 in a screened shed. 



