268 DISEASES OF SWINE 



that they were infected while on exhibition at the district stock 

 show, and did not develop active symptoms of the disease until they 

 had arrived in Ohio. Again, there is the possibility that they may 

 have become infected while in transit, or by being unloaded over 

 infected chutes at the local railroad yards. In any case, the out- 

 break at least shows the great danger which attends bringing in 

 new animals and adding them directly to your feed lots without 

 first placing them in temporary quarters removed some distance 

 from the home herd, and allowing them to remain thus quarantined 

 for at least thirty days. It is a little inconvenient sometimes 

 to do this, but it is decidedly more inconvenient to bury or burn 

 several hundred dollars' worth of dead hogs. 



Another practice which is somewhat similar to this is the neigh- 

 borhood ownership of a boar, which is taken from one farm to 

 another for service. Such animals are not infrequently the cause 

 of carrying infection from one farm to another. 



In a certain district in central Illinois a neighborhood boar of 

 this kind was kept. He had been used during the early spring 

 by one farmer, and early in May was taken to a second farmer for 

 service. About a week after he left the first farm hog-cholera 

 broke out there, and a couple of days later the boar began to show 

 unmistakable signs of cholera. He was separated at once from 

 the sows, and passed through a mild attack of the disease, from 

 which he entirely recovered. Ten days later, however, several of 

 the sows were off feed and two died within the next two days. 

 Prompt administration of serum in this herd stopped the outbreak, 

 with the loss of but one more sow, but there can be no question 

 that the disease was carried to this farm by the boar, and but for 

 the prompt use of free doses of serum serious losses would have 

 resulted. As it was the loss was over $100, as the animals lost 

 were all valuable, high-class sows. 



Another dangerous plan is to send sows away to breeding farms 

 to be bred. This is always an undertaking accompanied by great 

 danger, as there is the chance of infection in the cars both going 

 and coming, and also the danger from infection on the premises, 

 either from the home herd or from other sows sent in for breeding 

 purposes. 



In illustration of a case of this type, I recollect an incident 



