CONTAGIOUS DISEASES. 833 



In regard to the potency of animals which have aborted, Professor 

 Beach reports as follows : 



Only one of the twenty-four animals that experienced a premature 

 birth failed to breed after aborting. This animal was killed and the 

 post-mortem examination showed the presence of an ovarian tumor which 

 may or may not have been caused by the treatment administered to in- 

 duce conception. Twenty-three of these cows produced a normal calf 

 461 days subsequent to abortion. * * * Experience indicates that 

 it is useless to attempt to breed a cow for four or five months subsequent 

 to aborting. Time must be given to recuperate. The success in getting 

 these cows in calf after the premature delivery is attributed in part to the 

 use of the yeast treatment. A yeast cake dissolved for twenty-four hours 

 in a pint of warm water was injected into the vagina several days in 

 succession previous to the time of mating. 



The following advice as to preventive treatment and remedial measures 

 is given by Professor Wilson : 



It is well to call some competent veterinarian, in a case of contagious 

 abortion, so that the farmer may learn the need of careful work in clean- 

 ing all infected places, and, also, the technique regarding the use of the 

 syringe. After a few trials this manipulation becomes easy and he will 

 soon learn to employ the necessary care in keeping this disease in check. 

 * * * All cows that have aborted or that are suspected should be 

 isolated from healthy animals. Just as soon as a cow aborts the offspring 

 and afterbirth should be destroyed by burning and the immediate sur- 

 roundings treated with lime after the trash has been removed and burned ; 

 all woodwork should be thoroughly disinfected by the use of corrosive 

 sublimate. This can be obtained, with directions for use, at any drug 

 store. A second disinfection with corrosive sublimate should take place 

 ten days later. * * * Cows that have aborted should be washed out 

 daily with a 1 per cent solution of creolin or lysol until all discharge is 

 stopped. It is somewhat risky to use this treatment with pregnant cows, 

 but in this case a tablespoonful of sodium hyposulphite, once in twenty- 

 four hours, should be given as a drench. All of these, with directions for 

 using, may be obtained at nearly any drug store. 



During thapast few years Prof. Bernard Bang, of Denmark, has carried 

 on experiments in attempting to immunize cows, sheep, and goats against 

 the disease. He has observed that aborting cows acquire a certain degree 

 of immunity. His treatment produced abscesses and other symptoms of 

 reaction, but considerable immunity resulted, and he hopes that this 

 method of vaccination will ultimately give a means of controlling the 

 disease. 



