512 The Philippine Journal of Science wis 



ical salt solution which caused them to disgorge blood. This 

 mixture of blood and salt solution was injected subcutaneously 

 into bull 3473. The animal showed a rise in temperature on 

 August 5, but on August 9 was found positive for surra, which 

 at the time was thought to be the possible cause of the rise in 

 temperature. However, the animal developed diarrhoea and ate 

 but little on August 11, showed inappetence on August 12, and 

 died on August 14. From the symptoms and autopsy findings 

 it was evident that this animal had an attack of rinderpest as 

 well as of surra. 



On July 29, 1912, sixteen leeches were allowed to feed on bull 

 3400, in the second day of febrile temperature of an attack of 

 rinderpest, and were placed in water in a cool place. These 

 were employed at different periods, shown in experiments 7 to 

 10, to test upon cattle the infectiveness of the blood that they 

 contained. 



Experiment 7. — On August 4, six days after having fed, 2 

 leeches were placed in 50 cubic centimeters of physiological salt 

 solution, which caused them to disgorge. The mixture of blood 

 and salt solution was injected into bull 3477. This animal dis- 

 played the first rise in temperature on the evening of August 7, 

 was found to be infected with surra on August 9, and died on 

 August 13. This animal developed nervous symptoms which 

 are characteristic of a somewhat rare type of rinderpest. It 

 also showed a subnormal temperature of 36°.2 C, which is fre- 

 quently present in rinderpest just prior to death. Autopsy 

 revealed slight lesions of that disease. It was evident that this 

 animal had died from the combined effects of rinderpest and 

 surra. 



Experiment 8. — On August 10, 1912, twelve days after feed- 

 ing, 2 leeches which had fed on July 29 were placed in 50 cubic 

 centimeters of physiological salt solution, which caused them to 

 disgorge. The blood and salt solution was injected into bull 

 3492. The animal showed a rise of temperature on August 14, 

 developed diarrhoea with partial inappetence on August 18, and 

 died on August 19. From the various symptoms and from the 

 autopsy findings, it was concluded that this animal had con- 

 tracted rinderpest and died of that disease. 



Experiment 9. — On August 16, 1912, eight small leeches, 

 twelve days after having fed on July 29, were placed in physio- 

 logical salt solution, which caused them to disgorge. The mix- 

 ture of blood and salt solution was injected subcutaneously into 

 bull 3491. This animal showed no ill effects from the injection, 

 but at a later date was proved to be susceptible to rinderpest. 



