Pneumo-enteritis in Sheep, etc. 73 



cosa is the seat of a muco-pnrulent or sanguinolent discharge, the 

 anus is soiled with liquid faeces, the subcutaneous connective 

 tissue marked by red arborescence and blood-stained areas, or by 

 a gelatinoid exudation, the muscles at times deeply colored and 

 petechiated, the lymph glands, especially the bronchial and me- 

 senteric, are enlarged and congested of a deep red — the color be- 

 ing highest in the cortical zone. In some old standing cases these 

 may have softened and acquired a grayish hue. They are rich 

 in the specific bacterium. 



The peritoneum is congested, petechiated, thickened, and more 

 or less covered with thin false membranes, and it contains from a 

 pint to three quarts of a sero-sanguinolent liquid which coagulates 

 loosely on exposure. The liver is congested, with points of blood 

 extravasation, and zones of degeneration (fibroid, fatty or necro- 

 tic), and sometimes ab.sce.ss. The congestion extends to the 

 spleen and pancreas. The abomasum and intestines are the seat 

 of mucous gastro-enteritis. The mucous folds of the pyloric sac 

 of the stomach are congested, reddened and petechiated, the small 

 intestine has tracts and patches of congestion, thickening and .soft- 

 ening, Peyers patches and the solitary glands are enlarged, and 

 ulcers may be present on large or small intestines. 



Efifusion is usually found in the pleura, clear, grayish or bloody, 

 with floculi and false membranes, and further branching redness 

 of the serosa. The mediastinum may be thickened by exudate 

 especially around the glands, oesophagus and blood vessels. The 

 lung shows lobular, interlobular and peribronchial exudates ap- 

 proaching at times to the appearances shown in lung plague, 

 along with the atelectasis, emphysema and, in prolonged cases, 

 caseation. 



Less constant are congestions and petechiae of the pericardium, 

 heart, kidneys, vesical mucosa, te,sticles, ovaries or womb. The 

 blood is dark and forms a loose coagulum. In case of abortion 

 the umbilical cord is infiltrated and the placental membranes 

 ecchymotic. The brain and spinal cord and their membranes are 

 sometimes congested and infiltrated and a serous effusion exists 

 in the arachnoid. 



The bacterium is found more or less abundantly in each of the 

 morbid lesions. 



Prevention. Absolute seclusion of the sick and of all their 

 products is the prime essential. The general distribution of the 



