STERILITY 125 



be thoroughly disinfected with a solution of bichloride 

 of mercury 1 to 2000 containing one per cent of copper 

 sulfate. The same disinfectant should be used to flush 

 the vagina of the suspected cows. Nocard 1 recommends 

 the following solution for cleansing the external genitals, 

 anus and tail of the aborting cow : 



Distilled or pure rain water .... 2 gallons 



Hydrochloric acid 2^ ounces 



Corrosive sublimate 2\ drachms 



These ingredients should be thoroughly mixed. 



In Denmark, according to Dalrymple, 2 all membranes 

 and the foetus are buried in lime and the internal genital 

 organs of the cow are thoroughly disinfected with a one 

 per cent solution of creolin or a half per cent solution of 

 lysol. The external genitals of the bull and of cows about 

 to be bred are treated with the same solution. 



All aborted tissues must be burned and the premises 

 thoroughly disinfected. This treatment is uncertain 

 and often unsuccessful. A breeder will generally gain 

 time in the eradication of abortion from his herd by insist- 

 ing upon never using a contaminated male on young heifers 

 bred for the first time or upon cows known to be free from 

 the disease. All infected and aborting cows should be 

 separated absolutely from the females which have never 

 aborted. All cows known to be free from the disease 

 should be covered by a bull also known to be free from 

 infection. The uninfected herd must be guarded from 

 infection from the diseased herd. This plan will even- 

 tually build up a clean herd and no other method so far 

 devised is certain to accomplish this desirable result. 



1 Dalrymple, "Veterinary Obstetrics," p. 59. 



2 Loc. cit. 



