454 DISEASES OF SWINE 



received 10 c.c. of the same serum. Three large spring shoats, 

 weighing 150 pounds, and 13 old hogs, weighing 300 to 450 pounds, 

 were treated with 40 c.c. each of serum, plus 2 c.c. of the virulent 

 blood. 



Four old sows and 10 shoats of various sizes were left as checks. 



This farmer was evidently not entirely confident of the effects 

 that might follow the use of the serum, for he began, as a further 

 precaution against the disease, to feed the animals with copper 

 sulphate, or, as it is commonly known, blue vitriol. The bad 

 effects which followed were probably due in a large measure to 

 this fact. 



The checks and treated hogs went along all right until October 

 25th, when some of the animals which had been treated seemed 

 to be off feed. Word was sent to the station at Ames and the herd 

 visited on October 28th. At this time one of the treated shoats 

 had just died and another one was nearly dead. The animal which 

 was about dead was killed, and the two bodies opened up. The 

 same type of change was seen in both cases. In each body the 

 spleen was very much enlarged and filled with blood. This was 

 about the only important change that could be seen. One body 

 showed a few spots on the lungs, and the other showed the presence 

 of a considerable amount of fluid in the lungs. No spotting of the 

 kidneys or ulcers in the bowels are reported. 



In addition to the 2 that were killed there were 2 or 3 others 

 sick at this time. All of these animals had received the simul- 

 taneous method of treatment. The check animals all appeared 

 well. 



By November 1st 5 of the treated animals had died and 2 

 more were sick, while all of the checks remained well. Later 

 on 2 of the checks died, but in neither case was it possible to 

 make a trip to the farm and open up the bodies to find out the 

 cause of death. 



The results obtained in this herd are just a little confusing, 

 and it is somewhat hard to arrive at conclusions as to the actual 

 results. 



While it is true that several of the animals which were given 

 the simultaneous treatment did take sick and 5 of them died, yet 

 the findings, on opening up the dead bodies of the animals which 



