Dourijie 91 



overwhelming that it would seem poor policy to take the risk of 

 a violation of quarantine regulations and the breeding of these 

 animals by the owners. In the Illinois outbreak the opposite 

 course was pursued and a small number of mares was allowed to 

 live and used for work purposes under strict quarantine against 

 breeding or disposal. Though the plan has not been followed by 

 any disaster, it was«nsafe and necessitated prolonged vigilance. 

 In the community where they were, however, each neighbor 

 knew .the history of each of these previously diseased mares and 

 would probably have reported any open violation of the quaran- 

 tine very promptly. It is needless to say that careful watch 

 should be kept over the breeding animals, especially the stallions, 

 in the infected area for several years and prompt and rigid in- 

 vestigations made upon the slightest suspicion of a recurrence of 

 the malady. 



