vaccines produced in Ontario, which are very effective against these diseases. 

 However, the most serious disease confronting the ranchers is one first detected 

 in the Aleutian mink, commonly called "Aleutian Disease." It is a highly infec- 

 tious disease and has been diagnosed on four or five ranches in the province. 

 One ranch suffered a 50% loss and pelted the remaining mink with a view to 

 stamping out the disease. Pens and equipment were disinfected before new breed- 

 ing stock was purchased. Research work on this disease is being conducted in 

 three provinces as well as at the Ontario Veterinary College and in the United 

 States. 



A total of 513 licences were issued in 1961, 449 were renewals, 59 were 

 new and 5 licences were issued with retroactive provisions to legalize the operation 

 of unlicenced ranches during the previous year. 



The following table shows the location by County or District of Licenced 

 Fur Farms — 1961 — 



TOTAL 508 



108 



