42 Veterinary Medicine. 



pitting infiltration which may extend down around the entire 

 throat, and even along the intermaxillary region to the chin. 

 When the canal is obstructed it may stand out as a thick rope- 

 like resilient swelling extending around the lower border of the 

 jaw and upward toward the cheek as far as the point of obstruc- 

 tion. When one parotid only is involved, the contrast with the 

 other is quite marked. The head is extended and carried stiffly. 

 When the nose is depressed, or when the head is turned to one 

 side or the other, the patient gives evidence of suffering from 

 compression or stretching of the inflamed region. The breath 

 and mouth exhale an offensive odor, determined by the decompo- 

 sition of mucus and of the retained food products. 



Among remote effects may be named dyspnoea and threatened 

 suffocation from pressure on the pharynx and laryngeal nerves, 

 and facial paralysis from pressure on the seventh nerve. 



The disease may go on to induration and remain permanently 

 in this condition, or it may suppurate and discharge through the 

 skin, into the pharynx or through the duct of Stenon. It may 

 communicate with both the duct and the skin and determine a 

 fistula. When suppuration occurs there is an access of fever, a 

 chill may be noticed, the swelling becomes more tense, harder, 

 more tender to the touch, and even emphysematous, and finally 

 points internally or externally. This may take place from the 

 fifth to the tenth day or later. When it opens into the duct it 

 may be seen oozing from the orifice in the cheek when the mouth 

 is opened, and in case the jaws are suddenly parted, it may es- 

 cape in a jet. In such a case and especially if the microbes have 

 come originally from the food the odor is very foetid. The ab- 

 cess is not always single and when multiple the pus may escape 

 externally by a variety of orifices. The pus is usually whitish, 

 yellowish or grayish and creamy, but it may be grumous or 

 bloody or serous and of a most offensive odor. In exceptional 

 cases the gland becomes more or less gangrenous and such parts, 

 exposed in the wound are hard, bloodless and insensible, and 

 add very materially to the fcetor. This may lead to general 

 septic infection, or the necrosed masses may slough off and the 

 cavities 'fill up by granulations. 



Diagnosis. Parotitis is distinguished from pharyngitis and 

 abscess of the guttural pouch by the absence of cough and nasal 



