72 MILK HYGIENE 



applies also, to a less degree, to animals that have 

 tuberculous broncho-pneumonia. 



There are no reliable statistics to show the preva- 

 lence of udder tuberculosis of the cow in Denmark ; but 

 the operation of the law requiring the compulsory 

 slaughter of cows with tuberculosis of the udder shows 

 it to be of quite common occurrence. For this cause 407 

 cows were killed during 1898-99 ; 592 in 1899-1900 ; 610 

 the following year ; and 584 in 1901-1902. From Saxony 

 it is reported that from 1888 to 1897, 1.1 to 3.7 per cent, 

 of the tuberculous cows killed in the slaughter houses 

 were affected with udder tuberculosis, and in the whole 

 German Empire in 1888-89, the percentage of udder 

 tuberculosis among the tuberculous cows killed was 1.62. 

 Ostertag rates the prevalence of udder tuberculosis at 

 4 per cent, of all tuberculous cows. Probably cows 

 reacting to the tuberculin test are not to be understood 

 among these, but only such as are found after slaughter, 

 by superficial examination, to be tuberculous. The num- 

 ber of cows with udder tuberculosis is, without doubt, 

 very great, and in connection with the control of milk 

 one cannot rate the significance of this disease too 

 highly. 



There is no information at hand concerning the prev- 

 alence of tuberculosis of the uterus. Judging from the 

 numerous specimens showing this lesion, received from 

 the city abattoir of Copenhagen, it appears to be prob- 

 able that this manifestation is quite common. 



In regard to tuberculosis of the intestines, it is 

 known that in mature cattle the disease follows tuber- 

 culosis of the lungs and liver, especially in the later 

 stages; and it is recognized with difficulty by clinical 

 examination. 



It has been affirmed within recent years, by Eabin- 

 owitsch and Kempner that the excretion of tubercle 



