528 INFECTIOUS ABORTION 



consequently the disease must be regarded as a uterine 

 catarrh." 



§ 415. Prevention. Dairyman have found that if they 

 keep animals that abort away from their sound cattle the 

 trouble does not appear. As it affects young cows, it is the 

 practice in some places to keep the 3'oung animals separated 

 from the others until they have become free from the disease 

 or at least until they have passed the period when it is apt to 

 occur after which they are admitted to the herd of older cows 

 with impunity. 



When the trouble appears in a herd the best prophylactic 

 is thorough disinfection of the stable and frequent washing 

 with a disinfectant of the vagina and external genitalia of the 

 cows that have been exposed. The vagina and uterus of the 

 aborted cows should be thoroughh^ washed with a disinfecting 

 solution. Brauer has recommended the subcutaneous injec- 

 tion in the groin of twenty grams of a two per cent solution of 

 carbolic acid. Immunizing experiments are in progress under 

 the guidance of Professor Bang, but it is too early to speak of 

 the results. 



All new cows that are purchased should be isolated from 

 the herd until after parturition has occurred at full term. 



The disinfectants that have been used with success for 

 external application are 5 per cent carbolic acid, 4 per cent 

 creolin, i to 1000 corrosive sublimate, and a solution of copper 

 sulphate containing fort}- grams per liter of water. The last 

 two may be used for vaginal douches. Bang recommends 

 lysol 0.5 to I percent for this purpose. There is great need 

 of further investigation into the control of this affection. 



REFERENCES 



1. Bang. The etiology of epizootic abortion. The Jour, of 

 Cotnp. Path, and Thera., Vol. X (1S97), p. 125. 



2. Bang. Infectious abortion in cattle. The Jour, of Conip. 

 Path, and Thera., Vol. XIX (1906;, p. 191. 



3. Braner. Ueber das Epizootische Verkalben der Kiihe. Deuts- 

 che Zeitschrfnr Thier.,^d. XIV (1888), S. 95. 



