CLINICAL SYMPTOMS OF DOUKINE. 
5 ( J3 
Go see some of the mares that have been served by the horse, 
before determining your diagnosis. This horse will answer for 
a typical acute case in a stallion. 
In the mare the mucous membrane of the vagina will be in¬ 
flamed and congested with probably an ulcer, although the ulcer 
has been almost entirely lacking in the outbreak. I think we 
have only found one mare that showed an ulcer in the acute stage 
of the disease. 
This mare, known as the Cowell mare, was bred to the stal¬ 
lion Trotteur and afterward to the stallion Mack, who- became 
infected from the service, affording us the opportunity of ob¬ 
serving early symptoms of the disease. When I first noticed 
anything wrong with him, he would raise one hind leg and then 
the other and appear a little sore. Owner stated he had trimmed 
his feet too close. The next symptom was a slight oedema of the 
testicle and sheath and in a short time well marked placques; 
then we knew we had him. This horse showed nicely on P. M. 
The chronic form of the disease is easily detected when you 
have a history of infection. If there is no history, you may be 
kept guessing. 
Perhaps an owner will call you and say the mare eats well, 
but was running down in flesh all the time. She is windy, tucked 
up in the flanks, and when taken out of the barn, knuckles over 
on the pasterns, appears lame in the stifle, acts very much like a 
mare that has made a poor recovery from azoturia. There may 
be some depigmentation about the vulva or udder. This symptom 
has been almost entirely lacking in our cases. 
The subacute form is the stage which seems to give the most 
trouble. The mare will apparently be in good health. Owner 
claims she does not work well and he has noticed nothing wrong; 
but on examination you often find an increased amount of mu¬ 
cous in the vagina. In a great many cases it will have a yellowish 
cast and the walls of the vagina will be stained a copper color. 
This yellowish tinge I consider very diagnostic, as on P. M. we 
have found this yellow sediment in the bladder in almost every 
case. I have in mind a mare known as the Lydden mare; she 
