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but not a chief part. In another article I shall collect my experi- 

 ence with congenital tuberculosis. Here I only state that evidently 

 this form is not a very rare one, as it has previously been believed 

 to be. I have personally and carefully investigated ol cases of 

 tuberculosis iu the foetus and in new-born calves. In most of these 

 cases there was very slight development. 



Therefore this disease would evidently have exerted at first no harm- 

 ful influence on the general condition of the health and life functions of 

 the animals. Generally there were found only afewsmalllumps in the 

 liver, somewhat larger, cheeselike, and calcified lumps in the portal,, 

 mediastinal and bronchial glands, and occasional single small 

 lumps in the lungs ; rarely in the spleen or other organs. One often 

 meets in large calves and heifers tuberculous changes whose origin is 

 iu all probability to be traced to a fostal infection. The chief point 

 is, however, that the principal form of fa'tal tuberculosis, that which 

 depends upon placental infection, will only arise in cases in which, 

 the cow suffers generalized tuberculosis. The bacilli must have 

 circulated in the blood of the mother in order to enter the placental i 

 vessels of the fa^tus. Fortunately the larger majority of tuber- 

 culous cows do not suffer from generalized tuberculosis, and by far 

 the larger number of apparently healthy cows which betra}' the 

 disease only through the tuberculin action, will bear, therefore, only 

 healthy calves. The tuhercnlin reaction of the cow alone gives no- 

 basis for susj^ectiiig the health of the calf. On the other hand, I do 

 not doubt that a certain number of high grade tuberculous cows 

 really bear tuberculous calves. The old practitioners are, therefore, 

 to this extent right, when they regard it as inadvisable to raise calves 

 which are born of "tuberculous" that is, apparently tuber- 

 culous cows. 



The bull probably only rarely transmits tuberculosis to the foetus 

 (the ovum) without infecting the cow at the same time. Aside from 

 cases of local tuberculosis in the masculine sexual organs, it is true 

 even of the l)ull that a virulent quality of the seminal fluid is only to 

 be feared when the animal suffers generalized tuberculosis. Most 

 tuberculous bulls which suffer merely from latent tuberculosis local- 

 ized in a few lymph glands or in the lung will certainly not produce 

 a foital tuberculosis. 



The inheritance of a disposition is often feared. The possibility. 



