-CONTAGIOUS PLEURO-PNEUMONIA. 
309 
ises its lobular features to some extent disappearing*. The 
spatization does not attain that completeness and solidity 
iserved in other pneumonias, but the most solid parts fre- 
lently remain to a small extent permeable. In rare cases 
•e found gangrenous spathes, hemorrhagic infarctions, suppu- 
tion. 
The pleurisy of this affection offers especially the icteric 
le of the inter-pleural exudates, and in general a want of 
Ihesive bands between the two pleural layers. The peri- epi- 
id endocarditis offer but little of special interest. The 
uscular tissue of the heart is usually pale, flabby and friable, 
ith, in severe cases, well marked hemorrhagic spots through- 
tt the entire organ. The enteric complications offer after 
arrhoea a diffuse muco-enteritis. The kidneys are pale- 
llowish and friable, the pelvis occasionally containing a con- 
lerable quantity of thick, mucus pus. Other pathological 
dons have perhaps been sufficiently indicated in ourdescrip- 
>n of symptoms. 
The diagnosis, as in many contagious diseases, may prove 
Tcult in isolated cases, that is, in the initial cases in a 
igtiborhood where a history of exposure is wanting. The 
ief reliance must be placed upon the sudden elevation of 
nperature without other explanation than infection, the 
ofound nervous depression, and chief of all, the Avell marked 
mdice as exhibited most clearly in the sclerotic coat of the 
eball. When nasal discharge is present its character is 
thognomonic. The pneumonia of this disease differs widely 
>m other pneumonias, in that the animal frequently assumes 
? recumbent position, and also an extension of the lung 
ions may occur to an extent incompatible with life in the 
iinary affection, and the animal retain a vigor which does 
t presage a fatal termination. 
The prognosis depends almost entirely upon the compli- 
ions. 1 he temperature gives no indication of the probable 
he. The pneumonia, even when affecting both lungs to an 
rent necessarily fatal in other pneumonias, is by no means a 
bcursor of death in this affection, owing evidently to the 
js complete hepatization attained. Even when both lungs 
l 
