122 



Agricultural Bacteriology. 



The taking of temperatures should be continued at least 

 until 18 hours after inoculation" or until there is a per- 

 manent decline toward the normal. 



The animals should be kept in as normal a condition 

 as possible during the test. Care should be taken not 

 to excite them as this will cause the temperature to rise. 

 It is usually preferable to make the test at the time the 

 cattle are kept in the stable, e. g., fall or winter. One 

 point to which attention should be especially directed 

 is the watering of the animals during the test. If an 



Hours After Injection. 



10 



12 



14 



16 



18 



20 



107 



106 



105 



I04 C 



3/ 



FIG. 15. TEMPERATURE CURVES. 



1. the temperature curve of a healthy animal after 

 injection with tuberculin; 2 and 3. the tempera- 

 ture curves of "tuberculous animals after injec- 

 tion with tuberculin. (After Moore.) 



animal drinks large amounts of cold water its tempera- 

 ture is often lowered 2 to 3 F. If the depression of 

 temperature should come during the reaction fever, it 

 might lead to a misinterpretation of the results. Water 

 should be given during the test, and no trouble will 

 ensue if given in small quantities. 



The increase in temperature in the tuberculous animal 

 is usually a number of degrees. In the case of a positive 



