STATE HYGIENE 605 



treatment of Cattle Plague. Animals were immunised to a 

 very high degree, and their serum was undoubtedly pro- 

 tective against Einderpest, but unfortunately it often pro- 

 duced Red Water, owing to the animal selected for serum 

 production having originally suffered from the disease. 



Animals brought up in a Red Water district obtain a 

 natural immunity against the disease, and the same may 

 be said of Biliary Fever in horses, and East Coast Fever 

 in oxen. 



Ordinary Texas Fever, Red Water, or Hamoghhinuria 

 may be produced either by the injection of blood from an 

 animal suffering, or which has suffered, from the disease, 

 or by the bites of ticks which have previously fed on an 

 animal affected with the disease. 



The whole question of prevention hinges on the tick, and 

 if tick eradication were possible, the whole group of diseases 

 known as Pyroplasmoses would disappear. 



The disease may be prevented from infecting a farm by 

 the exclusion of strange cattle, and the thorough upkeep of 

 wire or other fencing. Ticks will exist on such a farm, but 

 are harmless until they have fed on an affected case. 



In the purchase of cattle they should be obtained only 

 from those districts known to be free from the disease, while 

 the obvious precaution of keeping cattle free from ticks is 

 easier to lay down than to carry out. 



Baths for dipping cattle on an ordinary farm are out of 

 the question on the score of expense, but spraying the 

 cattle by means of special spray pumps, with either an 

 arsenical solution or a mechanical mixture of paraffin and 

 water are within the reach of all. 



With dairy cattle which are handled daily no difficulty 

 should be experienced in keeping the animals free from 

 ticks. 



Should the disease break out on a portion of a farm, the 

 cattle on it should be isolated and dressed for ticks. It is 

 perfectly safe to allow the healthy cattle to leave the 

 infected area after they have been thoroughly freed from 

 ticks both by hand and dressings, though the usual incuba- 



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