TEXAS FEVER. 495 



attack, in October or early in November, which is caused by another 

 generation of ticks. Sick native cattle infect with a new genera- 

 tion of ticks the pasture to which they are removed, but these 

 usually appear so late that they have but little opportunity to do any 

 damage; hence, sick natives do not, as a rule, cause visible disease 

 in other natives. 



It is of importance to remove all ticks, so far as this is possible, 

 from sick animals, since they abstract a considerable quantity of 

 blood and thereby retard the final recovery. 



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 salt 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 alcohol 2 ounces may be combined with the quinin, 

 according to indications of individual cases. An iron tonic contain- 

 ing reduced iron 2 ounces, powdered gentian 4 ounces, powdered nux 

 vomica 2 ounces, powdered rhubarb 2 ounces, and potassium nitrate 6 

 ounces will be found beneficial in the convalescent 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 plenty of clean and cool drinking water 

 and allowed to rest in a quiet place. If the stable or pasture is in- 

 fested with tides, the animal should be placed in a tick- free inclosure 

 to prevent additional infestation with these parasites and the intro- 

 duction 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 quar- 

 antine line are made yearly by the Secretary of Agriculture, and they 



