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lesion in the animal system the cow would in all probability have 

 shown no reaction. The diaphragmatic lobe of the right hnig 

 contained a mass of tuberculous tissue six to eight inches in dia- 

 meter, containing a cheesy semi-calcified material in the center ; 

 this was surrounded by numerous nodules varying in size from 

 a dime to half a dollar, all of which indicated renewed activity 

 of the disease at this point. 



There is still one cow in the dairy, also one of the eleven re- 

 maining from the first test, which, although it showed no reac- 

 tion, not even the slightest swelling at the point of inoculation, 

 presented to palpation a greatly enlarged retro-pharyngeal lymph 

 gland which is undoubtedly of a tuberculous nature, but which is 

 so completely sequestrated as to be beyond detection by any 

 tuberculin test. Such an animal while not an immediate danger 

 is an unsafe proposition, and the owner was advised to dispose 

 of it at the earliest moment. 



In connection with the testing of dairy stock and the improve- 

 ment of the sanitary conditions under wdiich milk is being pro- 

 duced, I bring attention to a clause in Section 11 of the city and 

 county milk ordinance which provides for the issuing to each 

 dairy owner upon application a permit to sell or otherwise dis- 

 pose of milk. The clause above referred to reads as follows : 



"He shall within four months after the filing of such applica- 

 tion furnish a certificate from a veterinary surgeon showing that 

 all such cows are free from tuberculosis. The IJoard of Super- 

 visors shall provide for the testing of cows and the furnishing 

 of such certificate without charge to the applicant." 



In order to aid the Board of Supervisors to intelligently carry 

 out the provisions of Section 11 of the milk ordinance and to 

 enable them to revoke any and all permits where the applicants 

 have not within the required period of four months furnished the 

 above referred to certificate of health from a veterinary surgeon, 

 it is hereby recommended that the Board of Agriculture and 

 Forestry through its Division of Animal Industry issue direct to 

 the Board of Supervisors such a certificate of health upon the 

 completion of the tuberculin test in each dairy. The following 

 blank form of certificate is recommended : 



CERTIFICATE OF HEALTH. 



Name 



Location of dairy 



Number of cows tested 



Number of cows passed 



Number of cows condemned 



Disposition of reacters 



