182 EXPERIMENT STATION RECORD. 



It was found that when cattle are ted material cuntainiug tubei'cle bacilli the 

 micro-organisuis are passed through the body aud appear in the feces. The 

 nasal discharge and the urine were found to be free from tubercle bacilli. In 

 the opinion of the authors, milk from tulierculous cows does not contain 

 tubercle bacilli, at least, as a rule, until the udder and structures connected 

 AVith it are affected. In stables where tuberculous cows are kept, however, the 

 feces contain sufficient tubercle bacilli to infect the nulk in nearly all cases 

 from the dust of the stable unless special precautions arc taken. 



It was shown that the feces of tuberculous cows contsiins sufficient tubercle 

 bacilli to render milk pathogenic even when minute (|uantities of the feces are 

 added to the milk. On account of the great danger from the spread of tuber- 

 culosis through the agency of the feces, it is reconunended that iill dairy cows 

 be periodically tested with tuberculin and that all reacting cattle, regardless of 

 their condition of health, be separated from healthy cattle and not used for 

 dairy i»uri)oses. 



Primary tuberculosis of the lungs and bronchial and mediastinal glands 

 in young calves due to the ingestion of tuberculous virus, A. Chauvkau 

 (Conipt. Rciiil. A((i(L Sci. [P(iris\. I'i'i {19(11), Xo. ll, pp. n7-7!^3). — In connec- 

 tion with the evi<lence presented by recent investigators that pulmonary tuber- 

 culosis in animals and man ma.v arise from infection through the alimentary 

 tract the author calls attention to certain investigations which he made from 

 1S(J8 to 1S74 in which i)uhnonary lesions were brought about by the ingestion of 

 tubercle virus without the production of any pathological conditions in the 

 alimentary tract. 



Inoculation of blindworms and snakes with human tubercle bacilli, 

 J. Sorgo and E. Suess {Cenfbl. -Bakf. [etc.]. 1. Mtt.. (>ri(j.. ',3 (lOOl), Xos. 5. pp. 

 Jf.i.i-'jS.i : a, pp. 529--)Ji7). — In the long series of experiments carried out by the 

 authors, human tubercle bacilli were found to cause true infection in blindworms 

 aud snakes. As a rule, tubercle bacilli of human origin did not become modified 

 so as to produce an infection in warm-blooded animals. The author believes 

 that occasional modificiition <;f this sort is a mutation in the sense of de Vries 

 and that under ordinary conditions the tubercle bacilli from human beings and 

 from warm-blooded animals are quite distinct. 



The distribution of iodin in tuberculous animals, O. Loeb and L. Michaud 

 {Biochcni. Ztschr.. 3 (1901), Xo. 2-^, pp. 301-3 i J,).— Several investigators have 

 sought to obtain evidence regarding the question whether pathological processes 

 exercise any specific attraction for drugs. In order to obtain some experimental 

 data on this point the authors administered potassium iodid to rabbits after 

 having previously inoculated them with tubercle bacilli. It was found that 

 more iodin was stored up in the tubercles than in the healthy tissues. Similar 

 results were obtained in experiments with guinea pigs. It appears, therefore, 

 that tuberculous tissue has a high power of absorbing iodin combinations. 

 The iodin thus absorbed is not in insoluble organic combination. 



Taking samples of sputum by means of tracheotomy in diagnosing 

 tuberculosis, A. A. Overbeek (Tijdschr. Vceart.sciiijJc.. 3'/ (1901), Xo. 6. pp. 

 311-31')). — The author reports that in cattle suspected of being tuberculous, the 

 "use of a trocar inserted through the rings of the trachea will enable the operator 

 to obtain bronchial slime which may be at once examined for the presence of 

 tubercle bacilli. This method is recommended in examination of cattle intended 

 for transport, in making a differential diagnosis between tuberculosis and 

 pleuro-pneumonia, in examining dairy cattle and calves, and also calves used 

 tor the production of vaccine. 



The etiology and vaccination for tuberculosis, A. C almette (Jour. Roi/. 

 Just. Puh. Health. 15 (1901), Xo. 3, pp. i^y-i55;.— Apparently no domestic 



