594 EXPERIMENT STATION RECORD. 



VETERINARY SCIENCE AND PRACTICE. 



Tuberculin experiments in cattle, F. Hutyra {ZUchr. Ticrmed.^ Jf. 

 {1900), JVo. 1^ pp. 1-27). — The author believes that in the application 

 of the tuberculin test it is quite sufficient to take the bod}" tempera- 

 ture only once before inoculation with tuberculin. After inoculation 

 it is not necessary to take the temperature until the ninth hour, and 

 then every 3 hours rather than every 2 hours. All animals are to be 

 considered as tuberculous which show a temperature reaction of 1.5° 

 C. after injection with tuberculin; also all animals which show a tem- 

 perature reaction of 1 to 1.4^ C, accompanied with other clinical 

 symptoms. On the other hand there is no good reason to condemn 

 animals when the temperaturG reaction is not greater than 1.4° C. and 

 is unaccompanied with other clinical symptoms, provided that a careful 

 examination of the animals has not disclosed an}' pathological changes 

 or clinical evidence of tuberculosis. 



The author has brought together in tabular form the clinical records 

 of a large luimlier of animals upon which experiments were made. 



Experiments in feeding tuberculous milk, meat, and various 

 organs, V. Galtier {Jour. JLed. Yet. d Zootech.^ 5. scr.. 4 {1900), pp>. 

 l-o). — An emulsion prepared from 2 spleens and 2 lungs of tuberculous 

 rabbits was mixed with a liter of cow's milk. This mixture was fil- 

 tered and divided into 4 equal parts. One part was not heated, while 

 the other 3 parts were subjected for 6 minutes to temperatures of 70, 

 80, and 90° C, respectively. Four guinea pigs which were inocu- 

 lated with the unheated milk died of generalized tuberculosis. Of the 

 4 guinea pigs which were inoculated with milk heated to 70°, 3 showed 

 tuberculous lesions, and were killed on the fifth da}^ after inoculation. 

 On the same day one of the 4 guinea pigs which had been inoculated 

 with milk heated to 80° showed tuberculous lesions, while the 4 which 

 had been inoculated with milk heated to 90° were all health3^ 



Several other similar experiments were conducted by the author, 

 the results of which may be stated as follows: Milk is not thoroughly 

 sterilized b}" subjection for 6 minutes to temperatures of 70, 75, 80, or 

 85° C. Exposure to these temperatures for 6 minutes onh' attenuated 

 to a slight extent the virulence of the tubercle bacillus, and tubercu- 

 losis is produced by inoculation of even small doses of milk so treated. 

 Exposure to a temperature of 75° for 20 minutes is not sufficient to 

 destroy all the tubercle bacilli. 



Feeding experiments were conducted by the author upon young pigs 

 with tuberculous material which had previously been sterilized in an 

 autoclave at 110° C. As a result of these experiments the author con- 

 cludes that the consumption of tuberculous organs which have pre- 

 viously been sterilized does not produce poisoning or tuberculosis 

 even when taken in considerable quantities and repeatedly. 



