164 TUBERCULIN-TESTING A CITY'S RETAIL MILK SUPPLY 



and out of the total number tested 210 cattle were killed; thus 

 out of approximately 8,000 cattle supplying Rochester with milk 

 more than 20 per cent, of them were tested as a result of this 

 work, and of those tested approximately 12 per cent, reacted 

 and were killed. 



ReultB Obtained by Tuberculin Testing the Retail Milk Supply 

 of Rochester, N. Y. 



Number of retailer 185 



Number of samples examined 242 



Number of guinea pigs used 484 



Died shortly after inoculation 14735.95 per cent. 



Injected with 5 c. c. of sediment 285 



Injected with 5 c. c. sediment, died shortly afterward 61 21.40 per cent. 



Injected with 5 c. c. cream 199 



Injected with 5 c. c. cream and died shortly afterward 8643.21 per cent. 

 Living at the end of two months and injected with 



2 c. c. crude tuberculin 237 



Reacted 30 12.65 per cent. 



Sediment 18 7.59 per cent. 



Milk 12 5.06 per cent 



No tuberculin used, evident tuberculous lesions 



found 100 5 per cent. 



