6 DISEASES OF THE DOMESTIC ANIMALS 



ated tissue. The open wound resulting is covered with a dressing 

 powder — as equal parts tannic acid, iodoform, boric acid and char- 

 coal — and cleansed with hydrogen dioxide. Carbolic acid in gly- 

 cerine (i to 16), or peruvian balsam, may be used later to stimu- 

 late granulation. 



Accessory Sinus of the Nose and Guttural Pouches, Disease of 

 Inflammation of the Maxillary and Frontal Sinuses in the 

 Horse. 



Symptoms. — The various accessory sinuses may be affected, 

 but usually the superior maxillary and frontal. Extension of nasal 

 catarrh, carious teeth, trauma, glanders, strangles, and new growth 

 may induce sinus disease with catarrh, obstruction and empyema of 

 the sinus. One-sided nasal discharge, flowing in gushes with the 

 head down; and dulness and swelling over the sinus externally, 

 with one-sided enlargements of the submaxillary lymph nodes, are 

 seen. This simulates catarrh of the guttural pouches, but in the 

 latter there is difficulty in swallowing, noisy, obstructed breathing, 

 and swelling in the parotid region. 



Treatment. — The treatment of both conditions is surgical — tre- 

 phining, drainage and irrigation of the maxillary sinus, and hyover- 

 tebrotomy for disease of the guttural pouches. 



Acne. 



Symptoms. — Acne is due to clogging of the sebaceous glands 

 and hair follicles with inspissated sebum, and also to infection with 

 bacteria, leading to inflammation about the follicle. In pustular 

 acne, staphylococci are present. The pustular form is seen in horses, 

 dogs and sheep. In horses, as painful, hard pustules appearing 

 under the saddle or other harness, from which tallow-like sebaceous 

 matter followed by a drop or two of pus may be squeezed ; in dogs, 

 it is caused by pressure of a muzzle, or appears on the trunk and 

 extremities and may lead to considerable infection and large ab- 

 scesses ; in sheep, acne is observed after shearing — on the body and 



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