50 Veieriiiary Medicine. 



uras are often involved, showing arborescent congestion, thicken- 

 ing, exudate, false membranes and hydrothorax. The exudate 

 may at times fill up the interlobular connective tissue, even before 

 the pulmonary tissue is materially involved suggesting a local in- 

 fection starting at the pleural surface. The hepatised lobule has 

 a general red color varying in depth at different points, and 

 showing lighter yellowish or grayish spots representing the puru- 

 lent air sacs and terminal bronchia, and necrotic foci. On section 

 the bronchia often yield pus, while the pulmonary tissue oozes a 

 bloody liquid rich in small lymphoid cells. 



The liver and spleen may be all but normal, though in a number 

 of cases they may be congested and softened. The stomach 

 and bowels may be virtually sound, or they may show extensive 

 congestion, petechiatiou and thickening of the mucosa at different 

 points, with, in some cases ulcers, but these latter are mostly 

 excavated and rarely assume the projecting, buttonlike, laminated 

 form which is so characteristic of chronic hog cholera. Emaci- 

 ation is a marked feature as in hog-cholera. 



Symptoms. In the most acute type these may not differ from 

 those of similar cases of hog-cholera. If there has been any op- 

 portunity of estimating the incubation it will be found to have 

 been shorter, the skin and mucosae have a darker red blush, 

 showing first on the ears, breast, belly and inner sides of the 

 thighs and forearms, the lymph glands are enlarged, and there 

 is cough and dyspnoea if the patient is roused to exertion. The 

 presence of petechias on the skin and of a very high temperature 

 (107 to 109 ) is to be specially noted. There are great pros- 

 tration and duluess, complete anorexia, hiding under the litter, 

 indisposition to rise, often weakness, staggering, paresis or even 

 paraplegia, somnolence, and death in coma or convulsions. 



In the subacute and pi-otracted cases, there is the short incuba- 

 tion (1 day), followed by hyperthermia, drooping tail, hiding 

 under the litter, flushed eyes, nose and month, impaired appetite, 

 arched loins, hollow flanks, retracted abdomen, cough easily 

 roused by driving, and signs of consolidated lungs in their lower 

 parts (crepitation, suppressed murmur, abdominal or heart sounds 

 etc.). After a day or two the skin becomes flushed and together 

 with the visible mucosae the seat of petechias. The superficial 

 lymph glands are enlarged. The bowels are usually confined but 



