OF VETERINARY .MEDICINE. 49 



and very cold. The bricks hold the chill. The horses feed out 

 at noon in nose bags, and come in at night tired, very much so if 

 the ground is covered with snow and ice. They cannot resist 

 tlie chill of the barn, and the next morning one horse does not 

 eat his breakfast. He has acute laryngitis. 



Symptoms. — In all bad cases there is more or less chill, which 

 the attendant may or may not see; temperature 104-106; pulse 

 full, round and soft, and increased in frequency; throat swollen, 

 outside and in (the more it swells on the outside, the less it 

 swells on the inside), and those swelling freely on the outside are 

 not the most serious cases ; nose poked out. If this were seen 

 in the first stage, there would probably be a dry, sore, hacking 

 cough with disinclination to swallow. In the second stage an 

 cedematous, moist cough is present, and it is painful. The pain 

 is indicated by the horse shaking his head after each cough. 

 The discharge is profuse, mostly saliva, the reason for which is 

 that the inflammation is in close proximity to the parotid glands, 

 and stimulates them to increased functional activity. This se- 

 cretion passes back through the fauces but cannot go further 

 down on account of the swelling, and is therefore forced out 

 through the nose. In this condition the throat is sore; pressure 

 on the outside causes the animal to throw up his head, an indica- 

 tion of pain. 



The case runs along for 4 or 5 days, by which time there may 

 be a little pus, a few mucous follicles may suppurate, and the 

 discharge may be starchy. However, is usually consists of mucous 

 and saliva. The breathing is accelerated ; upon opening the 

 mouth it is full of ropy saliva. In all these cases there is more 

 or less dyspnoea, and the mucous membranes become cyanotic 

 according to the amount of dyspnoea present. The less oxygen 

 the horse gets the darker the mucous membranes become. If 

 the dyspnoea becomes severe, the eyes bulge, and the animal 

 makes a great noise both during expiration and inspiration. Death 

 may come any time between 48 and 100 hours, usually in about 

 75 hours. As death comes on the extremities get cold, the eyes 

 bulge, and weakness develops rapidly ; but the animal persistently 

 stands until he drops dead. 



Prognosis. — This depends entirely upon the amount of dysp- 



