Tuberculosis 121 



and have become used to the surroundings. However, if an animal is ex- 

 cited while making the tuberculin test, the excitement may cause a rise 

 in the temperature, thereby making the animal appear tuberculin. On 

 the olluir hand, very severe cases will not always react, but usually suf- 

 ficient symptoms can be seen to warrant an insjpection of the lungs, ud- 

 der, bladder, etc. Most any one can make the test accurately. 



I Take the temperature of each animal according to their No's, at 

 least three times at intervals of tVee hours before any tubtrculin is in- 

 jected. This is done to get the normal temperature of the cow by the 

 way of the rectum. 



II Wash the skin at the point where the tuberculin is to be injected 

 with dip water before the injection. Inject the tuberculin with a hol- 

 low needle springe in the loose skin of the neck. Make the injection at 

 8 p. m. 



III Record the temperature of all cattle nine hours after the in- 

 jection is made and every 3 hours for 16 hours after the injection is 

 made, 



IV If the temperature does net rise within 16 hours after the in- 

 jection, the cow may be turned loose. However, if the temperature 

 shows an upward tendency continue to take the temperature until the 

 rise ceases, 



V If the temperature rises before the sixteenth hoUr the taking of 

 the temperature should be continued till a fall of temperature begins, 



VI A sudden change of temperature surrounding the cattle will 

 make an inacurate test. 



VII The test is not reliable if a co,w is in febrile condition. 



VIII Cows that are far advanced in pregnancy or that have just 

 calved do not give a reliable test. 



IX Calves under six months should not be tested, 



X If retests are made, or in old emaciated animals, twice the reg- 

 ular d<>,se should be used. 



XI Cattle proving tuberculin, that is if the temperature rises more 

 than 2 degrees over the highest temperature taken before the tuberculin 

 was injected, should be kept away fVom healthy Cc^tle, and marked tu- 

 berculin. Cloudy tuberculin is unreliable. 



The temperature in the majority of cases rises between the 6th and 

 12th hour after the injection. 



Cattle that have tuberculosis in the worst form do not show a very 



