TREATMENT OF CHOLERA 269 



which occurred on a breeding farm over in Iowa a few years ago. 

 A certain breeder was in the habit of receiving sows from the sur- 

 rounding district for breeding purposes. During this particular 

 season he had at one time several sows on the premises from differ- 

 ent parts of Iowa and Nebraska. One of these sows just before 

 leaving showed signs of sickness, and died within two days after 

 returning home. Postmortem evidence proved the diagnosis of 

 cholera. As all the animals on the breeding farm were immune, it 

 was not likely that the sow was infected on the premises, but more 

 likely that she became infected while in shipment. 



In any case her manure and urine were most certainly infectious 

 during the last few days of her stay on the premises, and within a 

 week after their return home several of the sows that had been in 

 the breeding lots at the same time with this animal became sick, 

 and were the means of starting several scattered outbreaks of 

 cholera in the districts from which they came. 



This case serves to illustrate how even the apparently impos- 

 sible may happen. The herd on this breeding farm were all im- 

 munized by the serum-simultaneous method, yet this one sow, 

 which undoubtedly contracted the disease from exposure while on 

 the way, was sufficient to infect the breeding lots, and the result 

 was a scattering of cholera over a circle several hundred miles 

 wide. 



As a matter of interesting note it might be added that in this 

 case none of the animals belonging on the breeding farm became 

 sick during this time or afterward, they having all been thoroughly 

 protected by the immunity given through simultaneous injection 

 treatment. 



Exhibiting at Fairs. — The danger which attends this practice 

 has already been referred to. Nearly every fall at some of the 

 state fair meetings there is an outbreak of cholera among the hogs 

 which are exhibited, and it is a very frequent occurrence for the 

 disease to break out in prize-winning animals after they have been 

 returned home. In the fall of 1912 there was a very severe out- 

 break of cholera on the fair grounds at one of the large state fairs 

 in the Central West. 



I have seen several cases where animals were sent to exhibit 

 at county or state fair meets and have developed genuine cholera 



