362 DISEASES LOCALIZED IN CERTAIN ORGANS 



(c) Abscess in the sublingual glands leads to swelling of the 

 tongue. The organ may be so swollen as to protrude from 

 the mouth. After bursting of the abscess, the edema of the 

 tongue rapidly subsides. 



(d) The superficial lymph glands and vessels of the skin of 

 the head may become involved. In this case in the regions 

 of the eyes, nose, cheeks and lips, painful strands, the size 

 of a slate-pencil, and surrounded by indurated tissue, are 

 noted. Later nodules form along the course of the swollen 

 lymph vessels. They finally erupt and discharge pus. In 

 individual cases considerable swelling of the head occurs 

 leading to severe dyspnea. , 



(e) Abscesses in the facial sinuses may form and lead to 

 empyema or very rarely to meningitis. 



Body. — (a) Abscesses in the subcutaneous lymph glands of 

 the body rarely occur in the region of the withers, flanks, etc. 



(b) Abscesses may form in the mammary glands, involving 

 one or both halves of the udder. In stallions scrotal abscesses 

 have been observed. 



(c) The perianal lymph glands are sometimes elected, caus- 

 ing retention of feces and symptoms of proctitis. 



Limbs. — (a) Abscess may form in the axillary, inguinal and 

 popliteal lymph glands. While they usually heal readily, 

 occasionally they are obstinate and induce lameness of con- 

 siderable duration. This is especially true of popliteal" 

 abscesses. 



(6) Abscess of joints (purulent arthritis) is not common. 

 One or more joints may be attacked. When the leg joints 

 are involved, there is severe lameness. 



Internal. Abscesses. — (a) Abscesses of the posterior cervical 

 lymph glands (prepectoral) sometimes rupture inwardly, pro- 

 ducing purulent pleuritis and pneumonia. Pronounced dysp- 

 nea and the usual signs on percussion and auscultation of the 

 thorax are noted on physical examination. 



(b) Metastatic lung abscesses. The symptoms of pneu- 

 monia (cough, purulent nasal discharge, temperature, auscul- 

 tation and percussion) indicate the condition. 



(e) The mesenteric lymph glands. These glands may be 

 primarily or secondarily involved. The symptoms are fever, 



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