THE MILK SITUATION IN THE DISTRICT OF -COLUMBIA. 137 



being enjoined to see that all cars used in the shipment of cattle are 

 thoroughly cleansed and disinfected before use. 



20. That the sale or exchange of animals affected with tuberculosis, 

 except for immediate slaughter or for breeding purposes under 

 official supervision, be inhibited under penalty of law. 



21. That all animals exposed to tuberculosis be retested at intervals 

 of six months to one year. 



22. That the tuberculin test be not applied to any animal having a 

 temperature higher than normal. 



23. That any animal having given one distinct reaction to tuber- 

 culin be thereafter regarded as tuberculous, though if the disease be 

 arrested, as evidenced by later successful withstanding of the tuber- 

 culin test, such fact be taken into account. 



24. That a positive reaction to tuberculin in any properly conducted 

 test, official or otherwise, in any animal in any herd, shall be con- 

 sidered evidence sufficient upon which to declare the herd to be in- 

 fected until such time as a subsequent test or elimination of animals 

 shown to be diseased shall demonstrate the herd to be free from 

 tuberculosis. 



25. That owners and veterinarians be compelled by law to report 

 the existence of tuberculosis in a herd, whether such information 

 result from clinical examination or from the tuberculin test. 



26. That some system of marking, for purpose of identification, be 

 adopted with regard to all cattle 3 years old or over shipped for 

 slaughter. 



27. That, except when purchases are made from disease-free herds 

 tested by a properly qualified individual, persons buying for breeding 

 purposes or milk production limit their purchases to animals suc- 

 cessfully withstanding the tuberculin test, and that in order to facili- 

 tate the compliance with this suggestion official authorities adopt such 

 regulations as will prevent the entry into their respective territories 

 of cattle for breeding purposes or milk production unless accompanied 

 by satisfactory tuberculin-test charts. 



28. That, with a view to securing uniformity in legislation regard- 

 ing the control and eradication of bovine tuberculosis, the laws of the 

 United States, Canada, and other American countries governing the 

 admission of animals from without their borders be made stringent 

 and as uniform as possible, as well as those regulating the interstate 

 and interprovincial movement of cattle. 



29. That in order to make cattle as resistant as possible to infec- 

 tion with tuberculosis, they be stabled in clean, disinfected, and 

 properly ventilated and lighted barns, giving them abundant clean 

 water, nutritious food, and a sufficient amount of daily exercise in 

 the open air; and that such other conditions be provided as are well 

 known to contribute to the health of animals, including the twice 

 daily removal of manure from stables and the installation of water- 

 tight floors and proper drainage. 



30. That the expense of applying the tuberculin test, when com- 

 pulsorily made, devolve upon the Government (State or municipal). 

 That in accordance with the " half-and-half " principle of appropri- 

 ating for the needs of the District Government, the cost, so far as 

 the testing of cattle located within the District boundaries supplying 

 milk to the Washington market is concerned, be provided one-1 



