476 DISEASES OF SWINE 



that cholera did not really exist. The condition was more Hkely 

 an inflammation of the large air-tubes, such as is not uncommonly 

 met with. This case serves to show that not every case of cough 

 in the hog is hog-cholera. 



Herd Number Twenty-five. — This herd also was located in 

 Milford Township, and was only about 40 rods from Herd Number 

 Twenty-three. The herd was visited and treated on the same date 

 as Herd Number Twenty-three and Herd Number Twenty-four. 



At this time the herd was apparently sick, as several of the 

 animals had a diarrhea and were not eating well. None were suffi- 

 ciently sick, however, to justify their being killed for the purpose 

 of postmortem examination. 



Seven shoats in this herd, weighing about 100 pounds each, 

 were each injected with 20 c.c. of serum. Fourteen others, of 

 about the same weight, including those that were sick, were left 

 to serve as checks. 



Further observation of this herd showed that neither the 

 treated animals nor those left as checks developed hog-cholera. 

 The sick animals apparently were not suffering from cholera, but, 

 instead, had some digestive disturbance which was the cause of 

 the diarrhea. 



This herd is also of some value in showing that not all cases of 

 diarrhea in the hog are due to hog-cholera. The serum has an 

 advantage, however, in these doubtful cases, that it certainly pro- 

 duces no bad results. In this case the use of the serum was fol- 

 lowed by no bad results. In case of doubt, it is always better to 

 play on the safe side, and inject the serum rather than wait for 

 some of the animals to die to make sure that the disease is cholera. 

 It must be remembered, in the handhng of a cholera herd, that time 

 is of the greatest value. The sooner after the outbreak starts that 

 serum is used in the herd, the smaller will be the losses from the 

 disease. When serum is injected almost immediately after the 

 first animals in the herd begin to show signs of illness it is often 

 possible to completely check the outbreak and prevent the loss of 

 any of the hogs in this herd. 



In addition to this, if the simultaneous treatment be used in 

 the herds on the farms immediately adjoining the infected premises, 

 the result will be the checking of any spread of the disease, and the 



