488 DISEASES OF CATTLE. 



when the fever has run its course. This tonic should be given in 

 heaping tablespoonful doses three times a day in the food. Good 

 nursing is essential in treating these cases, and the animal should be 

 given a nutritious laxative diet with plenty of clean and cool drinking 

 water, and allowed to rest in a quiet place. If the stable or pasture 

 is infested with ticks the animal should be placed in a tick-free 

 inclosure to prevent additional infestation with these parasites and 

 the introduction of fresh infection into the blood. Furthermore, 

 remove from the sick cattle all ticks that can be seen, as they keep 

 weakening the animal by withdrawing a considerable quantity of 

 blood, and thereby retard recovery. 



The sanitary regulations which have been enacted by the Depart- 

 ment of Agriculture for the control of cattle shipments from the 

 infected districts have for their initial purpose the prevention of the 

 transportation of cattle ticks from infected regions to those that are 

 not infected, either upon cattle or in stock cars or other conveyer, 

 during the season of the year when infection is possible. They are 

 based upon the fact that Texas fever is carried north only by the 

 cattle tick, and the exclusion of this parasite from the noninfected 

 territory has in every instance been found a certain method of 

 excluding Texas fever. The regulations governing the movement of 

 cattle from below the quarantine line are made yearly by the Secre- 

 tary of Agriculture, and they define the boundary of infected dis- 

 tricts. The infected area as now determined includes the territory 

 south of an imaginary line which commences in North Carolina, on 

 the Atlantic coast, and passes in a westerly direction through a few 

 counties in the middle of Virginia, North Carolina, Georgia, southern 

 portion of Tennessee, along the northern border of Arkansas, the 

 middle of Oklahoma, and the western part of Texas to the Rio Grande 

 and the Mexican border, whence it passes along the southern boun- 

 dary of New Mexico and Arizona and across the lower portion of 

 California to the Pacific slope (see PI. LI). This year (1908) cattle 

 may be moved from the quarantined district for purposes other than 

 immediate slaughter during November, December, and January into 

 the noninfected area within the States of Georgia, Tennessee, Texas, 

 and California, and to the States of Missouri and Kansas and the 

 Territories of Arizona and New Mexico, as may be provided for in 

 the regulations of these States and Territories, and after inspection 

 by and upon written permission of an inspector of the Bureau of 

 Animal Industry or a duly authorized inspector of the State or Terri- 

 tory to which the cattle are destined, and after permission shall have 

 been obtained from the proper officer of the said State or Territory. 



During the months of January and February, the first fifteen days of 

 March, and the last sixteen days of December in each year, cattle of 

 the quarantined area of any State or Territory may be moved inter- 

 state therefrom for purposes other than immediate slaughter under the 

 above-mentioned restrictions into those portions of the States of Vir- 



