RABIES. 149 



escape and the place he was killed. He is known to have 

 attacked four people, two horses, several cattle, and seven or 

 eight dogs. The people and cattle bitten fortunately escaped 

 injur}' : the one horse contracted rabies. This horse was 

 brought to the experimental station and kept under obser^-a- 

 tion until it died. Then rabies was reproduced in rabbits by 

 the injection of a small piece of brain from the horse. The 

 other horse was accidentally killed b}- an electric car shortly 

 after it was bitten, and the dogs were killed as a p-ecautionary 

 measure. 



In the summer of 1907 an outbreak of rabies was investi- 

 gated with Dr. Peter J. Mertz, of Xew Holland, Lancaster 

 County. Pa., on a farm upon which one cow died the day 

 before and two died that morning. The brains of both were 

 removed and brought to the laboratory of the Pennsylvania 

 State Live Stock Sanitarv' Board and examined, and a diag- 

 nosis of rabies was made. On an adjoining farm another 

 cow showed all the symptoms of rabies, and it was learned 

 that a little more than a month before a dog roamed over the 

 surrounding coutitrx" and was killed near by, and that an 

 examination of the brain of this dog at the laboratory- resulted 

 in a diagnosis of rabies. Before that outbreak was wiped out 

 it necessitated the destruction of 154 dogs, 25 cows and 

 10 horses. 



In the horse the symptoms are by no means characteristic. 

 The history that the horse was bitten by a rabid dog may nat- 

 urally aid the diagnosis, but to be absolutely certain experi- 

 mental examination must be made on the death of the horse. 

 Cattle drool and bellow a great deal, which are the two most 

 striking symptoms. Both cattle and horses may develop the 

 furious form, in which the horse may do himself a great deal 

 of bodily harm, and cattle as well as horses are known to 

 attack man as well as other animals. Both have been known 

 to bite, which is unusual for a cow. 



