A DISEASE IN CATTLE IN THE PHILIPPINE ISLANDS SIMILAR 

 TO THAT CAUSED BY ANAPLASMA MARGINALE THEILER ^ 



By William Hutchins Boynton 

 (From the Bureau of Agriculture, Manila) 



THREE PLATES AND ONE TEXT FIGURE 



The animals in which this disease was found were native cattle 

 from Batan Island, which is located some 48 kilometers from 

 the northern coast of Luzon. As rinderpest has not been in- 

 troduced on that island and as the animals from there are highly- 

 susceptible to that disease, these cattle are used at the Veter- 

 inary Research Laboratory for experimental work on rinderpest. 



The animals that were used in the experiments recorded in this 

 paper arrived in Manila by boat from Batan Island on June 7, 

 1915. They were placed in a corral in Manila until June 19, 

 when they were purchased by the veterinary division. Bureau 

 of Agriculture, for experimental purposes ; brought to the Veter- 

 inary Research Laboratory at Pandacan on the afternoon of 

 June 19; and placed in quarantine with several other animals. 

 Their temperature was taken twice each day, and their general 

 appearance was noted. 



On the morning of July 12, 1915, cow 3929 showed a tem- 

 perature of 38.6° C. The average temperature for fourteen 

 other cattle kept in the same shed and under similar conditions 

 was 37.8° C. The afternoon temperature of this animal was 

 39.6° C. Bull 3932 also showed a temperature of 39.7° C. Al- 

 though these temperatures were higher than those of the other 

 animals, they were not high enough to cause rinderpest to be 

 suspected. Their blood was examined for surra in moist pre- 

 parations and found negative. This was thirty-five days after 

 arriving from Batan Island and twenty-three days after being 

 brought to the laboratory. On July 13 both of the above animals 

 showed temperatures of over 40° C; they were immediately 

 taken out of the quarantine shed and placed in the shed with 

 sick animals. Their blood was again examined for surra with 

 negative findings. 



On July 15, 1915, bull 3939, which was in the quarantine shed, 



'Published in Phil. Agr. Rev. (1917), 10, 119-127. 



281 



