VETERINARY MEDICINE. 587 



fish. Only the last named was infectious. It produced a local lesion, but could 

 not be propagated any further. From this the author concludes that transmu- 

 tation is not possible. 



The conversion of the human type of tubercle bacillus into the bovine type, 

 A. Ebeb iMiincheni Med. Wchnscht:, 57 {1910), No. 3, pp. 115-120; abs. in 

 Intei-nat. CentN. Gesam. Tuberkulose Forsch., 4 (1910), No 12, p. 635). — Cattle 

 infected with the human type of bacillus eventually yielded bacteria resembling 

 the bovine type in virulence. 



The absence of living tubercle bacilli from some old tuberculous lesions 

 in man, L. Cobbett (Proc. Camhridge Phil. Soc, 15 {1910), No. 6, pp. 536- 

 539). — The author reports his findings and shows that in 5 out of 7 cases 

 which were undoubtedly tubercular the tubercles on injection into animals 

 produced no lesions. 



Transference of tuberculin hypersensitiveness, M. Onaka (Zfsc/ir. ZmmMm- 

 tUtsf. u. Expt. Ther., I, Orig., 7 (1910), No. 4, pp. 507-51.'}).— If normal healthy 

 guinea pigs are treated with the tissues from a tubercular guinea pig or anti- 

 formin extracts of the tubercle bacillus, tuberculin hypersensitiveness is con- 

 veyed to the animal. A reduction in complement is noted in most cases of 

 passive hypersensitiveness but not in active cases. 



Investig'ation in reg'ard to the significance of the tuberculin titer for 

 diagnosis, A. Eklandsen and O. V. C. E. Petersen (Hospitalstid. [Copen- 

 hagen], 53 (1910), Nos. 2Jf, pp. 6.57-676; 25, pp. 681-695; abs. in Internal. 

 Centbl. Gesam. Tuberkulose Forsoh., 4 (1910), No. 12, p. 629). — The cutaneous 

 reaction is preferred by the authors, owing to the fact that a certain amount 

 of sensibilization takes place with the subcutaneous reaction. 



The tuberculin titer (the greatest dilution which reacts with the individual) 

 has a certain relation to the degree of severity of the tuberculous process, being 

 zero in subjects free from tuberculosis, low in latent cases, high in new and 

 slight cases, and low with severe cases. A high tuberculin titer (from 200 to 

 400) points to the possible existence of an active process, but in this connec- 

 tion there must be considered subjects having either previously infected but 

 healed glands or bone tuberculosis, as these also have a high titer over a long 

 period of time. 



In regard to the inconstancy of the diazo reaction in the urine of the 

 tuberculous, M. Weiss (Med. EUnik, 6 (1910), No. 22, p. 867; abs. in Internat. 

 Centbl. Gesam. Tuberkulose Forsch., // (1910), No. 12, p. 632). — The inconstancy 

 of this reaction is due to the presence of a pro-body . which is evidently of a 

 peptone or poly-peptid nature and which can be converted into the reacting 

 substance by placing the urine in a thermostat for 24 hours at blood heat. 



This finding will probably help promote the prognostic value of the diazo 

 reaction, particularly in marked cases of tuberculosis. 



Beport on the combating of bovine tuberculosis in Sweden up to 1909, 

 G. REGNfiK (Meddel K. Landtbr. Styr. [Sweden], 1910, No. 2 (lJf9), pp. 80).— 

 The results of the work against bovine tuberculosis under government direction 

 up to the year 1909 are given in detail and summarized. 



The methods of combating the disease have been both offensive (eradicating 

 tuberculosis from diseased herds) and defensive (preventing its introduction 

 into healthy herds). In the initial tuberculin tests with 1,370 dairy herds, con- 

 sisting of 49,112 animals, 14,175 reacted, and up to 1909, 57,734 animals had 

 been found within the same herds, of which 1,761 or 3.1 per cent reacted on 

 second test. It is pointed out, however, that this result alone does not repre- 

 sent the entire value of the tuberculin testing, inasmuch as the progress in 

 dairy-bam and milk sanitation during the last 15 years has doubtless come, 

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