JOS Tuberculosis. 



culosis in varying proportions, up to 47.6% of the tuberculous 

 children. The frequency, however, with which tubercle bacilli 

 actually pass through the intestinal wall without producing demon- 

 strable changes in the intestines and mesenteric lymph glands 

 cannot be stated. The intestinal tract may be the avenue of 

 infection without itself or its regional lymph glands becoming in- 

 fected. The percentage given above should therefore be higher. 

 The works of McFadyean, MacConkey, Harbitz, Weichselbaum, 

 Bartel, Rosenberger, Rabinowitsch, Ipsen and others offer proof 

 for this contention, as they mention cases in which apparently 

 healthy mesenteric lymph glands contained tubercle bacilli which 

 although appearing to be in a latent form at the time of finding, 

 produced tuberculosis when inoculated into experimental animals. 

 It appears also to be proven experimentally that through the 

 feeding of tuberculous material tuberculosis of the lungs may 

 develop without the presence of intestinal tuberculosis or tuber- 

 culosis of the mesenteric glands (Bartel, Bongert, Kovacs and 

 others). In this regard the question may be raised as to whether 

 there is any possibility of the tubercle bacilli working up from 

 the intestines into the esophagus, and into the buccal cavity, 

 from which inhalation tuberculosis could result (Uffenheimer, 

 Dieterlen). 



This objection would not enter into consideration for the pur- 

 pose of milk control, since it is immaterial for the hygienist work- 

 ing along practical lines, whether the infectious agent causes dis- 

 ease in the body by way of the circulation or through inhalation. 

 In this instance it is only necessary to keep in view preventive 

 measures, which should completely prevent the body from com- 

 ing in contact with producers of the infection. 



Alimentary Infection of Man With Bovine Tuberculosis. 



After the supposed cases of transmission of the bovine tuber- 

 cle bacillus cited in former years failed to withstand critical 

 observations, Koch at the International Tuberculosis Conference, 

 held in Berlin, in 1902, urged the following up of all cases 

 of established tuberculosis of the udder, the determination of how 

 long the disease persisted, who consumed the milk and milk pro- 

 ducts from these cases, whether the milk had been boiled and 

 whether the respective persons became affected with tuberculosis. 



This request was fruitful of results, and in 1910 Weber pub- 

 lished the results of his compilation investigations, which were 

 carried out by the aid of official statistics from Prussia, Bavaria, 

 Saxony, Wurttemberg, Baden and Hessen. 



The investigations extended over the time between the be- 

 ginning of 1905 to April, 1909; the investigation of some of the 

 individual cases however is still being continued, since in the 

 chronic courses of tuberculosis it must be considered that the 



