﻿50 The Philippine Jouryial of Science i9i4 



DURATION OF RINDERPEST INFECTION IN CORRALS AFTER REMOVAL 



OF INFECTED ANIMALS 



Ecrperiment 1. — This experiment was designed to furnish 

 information regarding the length of time that rinderpest infec- 

 tion would remain in a corral subsequent to the removal of 

 infected animals. 



The corral had been subjected to infection by the presence of 

 bull 2985, carabao 3008, and carabao 3005, each of which had 

 undergone an attack of rinderpest while kept there. The period 

 during which these animals collectively had displayed febrile 

 temperature, diarrhoea, and other symptoms of rinderpest covered 

 fifteen days previous to their removal. At that time 2985 was 

 in the middle stage of the attack, and had been showing a febrile 

 temperature for five days. Furthermore, the corral had con- 

 tained other infected cattle and carabaos during the previous 

 three months. 



The corral contained a pool directly exposed to the sunlight, 

 which had been used as a wallow by the carabaos mentioned 

 above. There was very little shade, barely enough for the com- 

 fort of the animals, and no grass. The infectiveness of the 

 corral immediately after removing all animals was not checked. 

 A photograph of the corral is shown in Plate I, fig. 1. For 

 this experiment, the only water supply available was the above- 

 mentioned pool. No one entered the corral during the experi- 

 ment excepting after disinfection of the feet. The conditions 

 of the experiment follow: 



February 15, 1911. All animals were removed from the corral at 8 

 a. m. Sky clear and bright. 



February 16. At 8 a. m. bull 3052 was turned loose in the corral and 

 left for a period of twenty-four hours. It was seen to drink from the 

 carabao wallow. Sky clear and bright. 



February 17. At 8 a. m. bull 3052 was removed from the corral, dis- 

 infected, and segregated along with a susceptible control animal to check 

 against accidental infection subsequent to that in the corral. Sky clear and 

 bright. 



February 18. Corral empty. Sky partly cloudy. 



February 19. Bull 3055 was turned into the corral, and was seen to 

 drink from the wallow. Sky partly cloudy, high wind. 



February 20. Bull 3055 was removed from corral, disinfected, and 

 segregated with one control. Sky clear and bright. 



February 21. Corral empty. Sky partly cloudy. 



February 22. Bulls 3058 and 3059 were put in the corral, and drank 

 from the wallow. Sky clear and bright. 



