. Diseases of cattle, sheep, goats and swine. Veterinary medicine. ACUTE PAROTIDITIS. 135 the parotid region between the lower jaw and the upper extremity of the neck. The lesion is usually unilateral, but occasionally bilateral. Parotiditis may terminate in resolution, suppuration, or necrosis. The suppuration may either be simply subcutaneous and extra-glan- dular, or may involve a portion of the salivary gland and of the parotid lymphatic gland in addition. Necrosis is exceptional, though Moussu saw double and total gangrene of both parotids, complicated with septicaemia, in the animal, of
. Diseases of cattle, sheep, goats and swine. Veterinary medicine. ACUTE PAROTIDITIS. 135 the parotid region between the lower jaw and the upper extremity of the neck. The lesion is usually unilateral, but occasionally bilateral. Parotiditis may terminate in resolution, suppuration, or necrosis. The suppuration may either be simply subcutaneous and extra-glan- dular, or may involve a portion of the salivary gland and of the parotid lymphatic gland in addition. Necrosis is exceptional, though Moussu saw double and total gangrene of both parotids, complicated with septicaemia, in the animal, of which a sketch is given herew^ith. If the disease is due to violent injury by a foreign body, traces of a wound may be found, but it is often useless to search for these, even when the parts have been pricked with a sharp goad. When the in- flammation has resulted from ascending infection of the salivary ducts, exaggerated sensibility may sometimes be detected throughout the whole length of Stenon's duct, particularly at the point where the duct crosses the jaw. There is always marked ^^â-- difficulty in moving the head, X particularly towards the side, : , /' and sometimes in a vertical '.# plane. The head is extended â i on the neck, and is held stiffiy Fig. 63.âAcute parotiditis. in such a way as to suggest the possibility of tetanus. Some observers have described as an impor- tant symptom marked swelling of the orifice of Stenon's duct. It is cer- tainly difficult to detect, and furthermore is of no great significance. Diagnosis. Although diagnosis is easy, it is a difficult matter to detect the point of origin of the disease. The salivation and difficulty in swallowing might seem to suggest pharyngitis, a condition which sometimes exists simultaneously. The distinction between this disease and the forms of chronic parotiditis, or tumour formation in the parotid (due to actinomycosis, lymphadenoma, melanoma), is also easy, on ac- count of the slow development of the
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