TEXAS FEVER. 503 



Medical treatment of the sick has generally been unsatisfactory, 

 although in chronic cases and those occurring late in the fall bene- 

 ficial results have followed. If the animal is constipated, a drench 

 containing 1 pound of Epsom salts dissolved in 1 quart of water 

 should be administered, followed by sulphate of quinin in doses 

 of 30 to 90 grains, according to the size of the animal, four times a 

 day until the system is well saturated with it. Tincture of digitalis 

 one-half ounce and whisky or alcohol 2 ounces may be combined with 

 the quinin, according to indications of individual cases. An iron 

 tonic containing reduced iron 2 ounces, pow^dered gentian 4 ounces, 

 powdered nux vomica 2 ounces, powdered rhubarb 2 ounces, and 

 potassium nitrate 6 ounces will be found beneficial in the convales- 

 cent stage when the fever has run its course. This tonic should be 

 given in heaping teaspoonful doses three times a day in the feed. 

 Good nursing is essential in treating these cases, and the animal 

 should be given a nutritious, laxative diet with j)lenty 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 w^ith these 

 parasites and the introduction of fresh infection into the blood. 

 Furthermore, all ticks that can be seen should be removed from the 

 sick cattle, as they keep weakening the animal by withdrawing a 

 considerable quantity of blood, and thereby retard recovery. 



QUARANTINE REGULATIONS. 



The sanitary regulations issued by the Department of Agriculture 

 for the control of cattle shipments from the infected districts have 

 for their initial purpose the prevention of the transportation of 

 ticks from infected regions to those that are not infected, either 

 upon cattle or in stock cars or other conveyer. 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 Secretary of Agri- 

 culture, and they define the boundary of infected districts. The 

 infected area as now determined includes the territory south of an 

 imaginary line which commences on the Atlantic coast on the Vir- 

 ginia-North Carolina boundary and passes in a westerly direction 

 through Virginia, Xorth Carolina, Georgia, Alabama, Mississippi, 

 Arkansas, Oklahoma, and the western part of Texas to the Rio 

 Grande and the Mexican border, whence it passes along the southern 

 boundary of New Mexico and Arizona and across a portion of 

 San Diego, County, California, to the Pacific slope. (See PI. L.) 



