532 Veterinary Medicine. 



secondary outbreaks after the apparent extinction of the poison 

 have come from breeding mares that have apparently recovered, 

 or that after exposure have shown no appreciable symptoms. 



When a State is so lost to all sanitary considerations as to 

 abandon an affection of this kind to take its course, the owners of 

 stallions and mares cannot be too careful to avoid the exposure of 

 their valuable breeders to the risk of infection. Each mare 

 brought for service should be admitted only when accompanied 

 by a certificate showing all previous services in the last three 

 years, with the identification of the stallion, and this irrespective 

 of whether the service has been fruitful or not. In such certifi- 

 cate the owner of the mare should bind himself to make good all 

 damage or loss that may accrue from his failure to set forth in 

 the certificate every such service and ever}' symptom of illness 

 affecting the generative organs from which the mare has suffered 

 in the three years antecedent. 



The owner of the stallion should give a .similar guarantee that 

 the horse has in the past three years .served no mare that was in 

 any way open to suspicion, and that the animal has not suffered 

 from any affection of the generative organs which had any of the 

 characteristics of dourine. 



No mare should be served which shows swelling, nodules, dis- 

 tortion, or gaping vulva, a muco-purulent discharge, or too fre- 

 quent or too prolonged heats. 



No stallion in such locality should be allowed to serve which 

 shows pasty swelling of the sheath, swelling, shrinking or dis- 

 tortion of the penis, red, angry, tender meatus urinarius, or a 

 muco-purulent discharge. 



Unless in case of Arabian horses the appearance of white spots 

 on the dark ground of the sheath, penis, vulva, or perineum, 

 should be ground for debarring from service until an ab.solutely 

 stainless record covering a number of years has been shown. 



MAL de; caderas. 



This is a disease caused by Trypanosoma Equimcm described 

 by Voges who .studied the affection in the Argentine Republic as 

 it exists in a region extending from Santa Fe, and Corrientes on 

 the south to Bolivia on the north. It resembles surra in prevail- 

 ing in tropical heat, during wet weather, in its intermittent char- 



