24 DISEASES or THE AIR-PASSAGES. 



Sometimes the inflammation and consequent tumefaction of 

 the membrane of the larynx is so great that the glottis becomes 

 diminished to a degree to occasion shortness and difficulty 

 in breathing; should which increase greatly, the opening may, 

 through tumefaction of the membrane and secretion from it, 

 become so contracted and plugged as to give us apprehension 

 the horse, unless relieved, may be suffocated. In such cases, 

 not only is the larynx aflPected, but the surrounding mem- 

 branes as well of the fauces and pharynx and their investiDg 

 tissues; at the same time the guttural pouches and salivary 

 glands participate in the inflammation and swelling; of all 

 which the sequel is not unfrequently abscess of one or both 

 parotids, or it may be of the guttural pouches, or of the 

 submaxillary tissue; the case turning into one of violent 

 strangles. 



Glanders, even, has been known to follow laryngitis. 

 The membrane of the glottis, from continued or violent in- 

 flammation, becomes changed in its character. It becomes 

 infiltrated (dropsical), permanently thickened and indurated, 

 afterwards ulcerated; giving rise to a condition of parts either 

 simulative of glanders, or even to glanders itself. 



Cough, short, hard, dry and frequent, accompanies the 

 disease in its incipient stages ; though, as inflammation 

 increases and the sore throat growls severe, the cough becomes 

 faint and less frequent, and under extreme soreness of the 

 throat becomes so suppressed as to be hardly noticed at all. 



Nasal defluxion, when the disease assumes this violent 

 or acute form, is scanty or not perceptible at all; though it 

 becomes abundant and frequently most profuse at the height 

 and towards the decline of the inflammatory action. In cases 

 where it exists in profusion it is apt to be coughed up into 

 the mouth, mingled with the saliva. 



Fever will arise at the time the animal is labouring under 

 violent action and annoyance within the throat, augmenting 

 in proportion to the severity of the irritation. The animal 

 will refuse for a time all food, will have great frequency of 

 pulse, and heat of skin and mouth, and will in fact exhibit 

 all the symptoms of high febrile commotion in his system. 



