364 Infectious Pustular Stomatitis of Horses. 



The lymph, glands in the immediate vicinity of the affected 

 part of the body, that is the retro-pharyngeal glands, become 

 more or less acutely swollen. The swelling diminishes with the 

 formation of the ulcers, and soon disappears entirely. Excep- 

 tionally however it may lead to abscess formation (Mariott, 

 Groner). The lymph vessels leading to the swollen lymph 

 glands are thickened to distinctly perceptible cords in those cases 

 in which the exanthema develops on the skin. They likewise 

 disappear after the glands have regained their normal condi- 

 tion. If the inflammation of the mouth extends posteriorly the 

 clinical manifestations include symptoms of a mild pharyngeal 

 and laryngeal catarrh. Exceptionally the hair falls out in the 

 course of the disease, and the animals become greatly emaciated 

 ( Groner). 



Course. The disease lasts as a rule from 10 to 14 days, 

 but in somewhat more severe cases it may extend to 3 or 4 

 weeks. The pustules develop in from 3 to 6 days after the 

 appearance of the first symptoms. The suppuration requires 

 another 4 to 6 days-, and the healing of the ulcers requires about 

 the same length of time. A longer course is observed in cases 

 in which the pustules develop in slower succession, or the sup- 

 puration becomes malignant, through a subsequent septic infec- 

 tion, in which cases the healing of the deeper destruction of tis- 

 sue requires a longer time. 



Very exceptionally the disease may also terminate in death. 

 Poschl observed in a stud the deaths of three colts with mani- 

 festations of severe pharyngitis and septicemia, in which the 

 autopsy revealed marked swelling and suppuration of the folli- 

 cles of the mucous membrane of the pharynx and larynx, hem- 

 orrhages in the serous membrane, the spleen and the mucous 

 membrane of the stomach, also an acute swelling of the mesen- 

 teric lymph glands. In one case (Bayr. Mil. V.-B.), the affection 

 became complicated later with a diphtheritic inflammation of the 

 buccal mucous membrane, later diphtheritic ulcerations ap- 

 peared also on the skin and on the nasal mucous membrane, 

 and the animal died from general septicemia. Goldschmidt ob- 

 served the death of five affected horses from similar causes. 



Diagnosis. Vesicular or follicular stomatitis somewhat re- 

 sembles pustular stomatitis, but in the former no nodules pre- 

 cede the development of vesicles, and the vesicles contain only 

 a clear serous fluid. Inflammations resulting from injuries or 

 corrosions are distinguished from this affection by the history 

 of the case, and by the deeper penetrating destruction of tissues 

 in such conditions. 



A mistake is more readily possible when, besides the mucous 

 membrane of the mouth, that of the nose and the skin is also 

 affected, and still more when the affection is exclusively localized 

 to these parts. In such cases the following diseases enter intg 



