144 " Bulletin 65. 



man to man is far more common than from beast to man. But 

 though the implanted seed may have been in many cases derived 

 from a fellowman, its subsequent destructive progress maybe due 

 far more to the constant accessions of the soluble poisonous prod- 

 ucts conveyed in the meat and milk of tuberculous animals. 

 Without these constant doses of soluble poisons of tubercle, the 

 implanted germ would in many cases have proved comparatively 

 harmless. Although it could be proved in regard to many cases 

 that the cow had not contributed the seed of the diseases, she is 

 left little less responsible for the destructive progress and fatal 

 result. The germ which might have remained comparatively dor- 

 mant and harmless in the absence of the poisoned meat and milk 

 is by these stimulated to a more deadly energy. 



How TO Meet the Danger. 



This hitherto unchallenged factor in the progress of tubercu 

 losis, opens up new and uncultivated fields for sanitary work. 

 The great evil ventilated in this paper cannot be effectually met 

 without the eradication of tubercolosis from every herd kept for 

 the supply of food products for the public. Nothing short of this 

 can be trusted to act satisfactorily in putting a check upon the 

 present fearful mortality from this disease. No inspection of 

 dressed carcasses, nor of milk, butter and cheese will furnish a 

 guarantee. We must go to the herds and subject them animal 

 by animal to a critical test, and only accept the products as safe 

 when there is no longer a shadow of suspicion remaining. A 

 professional examination of the most searching kind must be 

 supplemented by the ' ' tuberculin' ' test before a clean bill of health 

 can be furnished. In my own experience on cattle two thirds of 

 the cases of tuberculosis sometimes escaped under the most criti- 

 cal professional examination and were detected later by the 

 "tuberculin" test. Often, when cattle were condemned by the 

 "tuberculin" test, have the owners pronounced them the most 

 thrifty and the least suspected in the herd, and it was only after 

 slaughter, when the bodies were opened and the caseated tubercle 

 exposed, that they were satisfied that no mistake had been made. 

 Recently in a herd kept for the supply of high priced milk of 

 guaranteed soundness, the stock having been subjected to weekly 



