176 HOG CHOLEEA 



new territory, our experience in concrete cases is 

 that one untreated cholera infected herd in a 

 neighborhood is more of a menace to adjacent 

 herds than ten properly maintained immune with 

 simultaneous treatment. In the untreated, in- 

 fected herd, there is a great temptation sometimes 

 to sell animals before a diagnosis of cholera is 

 made, some breeders are slow to accept the fact 

 that hog cholera is in their herds, and on the 

 whole the attack comes on unheralded, and much 

 damage is done before its true nature is realized. 

 On the other hand, when we administer simultane- 

 ous treatment to a herd we deliberately establish 

 our defenses against the spread of hog cholera 

 that may possibly result from it, the period of 

 acute danger is quickly passed, and the herd is no 

 longer a menace to others in the vicinity. 



When once the breeder decides to maintain his 

 herd immune to cholera, the practice must be faith- 

 fully carried out. Between keeping all animals 

 immune to cholera at all times and declining to 

 use any virus whatever, there is no middle ground. 

 We cannot temporize with a disease like hog chol- 

 era. Like the proverbial nettle, simultaneous 

 treatment incident to maintaining a cholera-im- 

 mune herd must be grasped firmly or avoided alto- 

 gether, for it will not do to have virus and suscep- 

 tible pigs in the herd at alternate intervals. 

 Sooner or later the two will get together. 



