180 EXPERIMENT STATION EECORD. 



studies on the comparative role of the digestive and respiratory organs as the 

 primary location of tuberculous infection. It appears that in many cases in 

 vi^hich the lungs and bronchial glands are affected most extensively, the original 

 infection was located in the intestines and was due to ingestion of tuberculous 

 material with the feed. The author believes that in this respect calves and 

 childi-en behave in the same manner toward tubercle bacillus. According to the 

 author's investigations the source of infection must remain doubtful even in 

 cases where the lungs and other respiratory organs are the only parts affected, 

 for cases which are apparently of purely pulmonary origin may nevertheless 

 trace their source of inf^-tiou through the intestines. 



The virulence of lym^phatic ganglia in tuberculous animals, H. Vall^e 

 (Compt. Rend. 8oc. Biol [Paris]. GO (1906), No. 19, pp. 911-91.3).— A number of 

 authors have called attention to the fact that lymphatic glands of apparently 

 normal condition may contain tubercle bacilli. This fact has been noted most 

 frequently in connection with experiments in imnuinizing cattle against tuber- 

 culosis by the use of human tubercle bacilli. In these cases the glands of the 

 immunized cattle contained tubercle bacilli for a long time after apparent 

 recovery from vaccination. The author finds that the mesenteric as well as 

 other lymphatic glands of cattle, after tuberculous infection from any source, 

 may contain virulent tubercle bacilli without showing any abnormal condition. 

 It is concluded, therefore, that none of the lymphatic glands in a tuberculous 

 animal may be considered as free from tubercle bacilli. The bearing of these 

 investigations on the utilization of tuberculous meat is apparent. 



Combating tuberculosis of cattle, J. Poels {Tijdschr. Tccartsenijlc, 33 

 {1906). Xos. S, pp. -'i77-'i96: !). pp. .',.3-J-5.'i8). — Attention is called by the author 

 to the great importance of a more thorough clinical stud.v of tuberculosis in order 

 to be able to recognize by the physical symptoms the first occurrence of tuber- 

 culosis in the lungs. It is believed that the extensive use of tuberculin and the 

 complete reliance of most veterinarians upon this reagent have led to some 

 neglect in the study of physical symptoms. The disease is admittedly more 

 infectious wlien the lungs are attacked than when it is confined to other internal 

 organs. The importance of being able to recognize the presence of the disease 

 in the lungs is therefore obvious. 



Four cases of equine tuberculosis on one farm, W. R. Davis {Vet. Rec, 18 

 (1906), No. 92.5, p. 678, p<j. 1). — The extensive development of tuberculosis was 

 observed in a 4-year-old mare which had to be killed on account of the presence 

 of the disease. Her colt likewise developed tuberculosis, and also two other 

 horses on the same premises. The author calls attention to the relative infre- 

 quency of tuberculosis in horses, but notes the fact that there were 4 cases of 

 the disease in horses during a period of 3 years on a small farm on which the 

 owner never had more than 6 horses at a time. 



A study of avian tuberculosis, Y. A. Moobe (Ztsclir. Jiifectioih^krank. n. 

 Tlyg. Haiisfiere, 1 (1906). No. '/-.T. jtp. 33.3-3.'i0). — A short account is given of 

 the exijerinients carried on by the author with regard to the nature and trans- 

 inissibility of tuberculosis in the fowl. It was found by feeding and inocula- 

 tion experiments that avian tuberculosis can not always be transmitted to 

 experimental animals, and also that human and bovine tuberculosis are not 

 always easily transmitted to fowls. All of the author's ex])eriments along this 

 line gave negative results. 



The immunity of Galleria mellonella toward tubercle bacilli, S. Metal- 

 NiKOFF (Compt. Rend. tioc. Biol. [Puri.s\. 60 (1906), No. 11, pp. .518, .519). — 

 On account of the fact that tubercle bacilli are surrounded with a waxy envelop 

 which appears to serve the purpose of protecting them against digestion and 



