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ARTHUR SALINGER. 
hepatization, in these abortive cases the disease may last only 
two to three days. 
In fatal cases', especially in cases of the typhoid variety, 
symptoms of general blood dissolution manifest themselves. 
Oedema of the lungs sets in and death due to heart failure 
comes on. 
The prognosis of croupous pneumonia is favorable in a large 
^majority of cases, unfavorable cases are those presenting the 
typhoid state and those in which complications develope, es¬ 
pecially pleurisy with effusion. 
The termination be either in complete resolution, delayed 
resolution, in chronic interstitial pneumonia, (which occurs 
either in very young or very old animals, those debilitated by 
some previously existing disease as bronchitis) by abscess and 
by gangrene of the lungs, the latter terminations are rare. 
Diagnosis .—Croupous pneumonia can be readily diagnosti¬ 
cated from catarrhal pneumonia by its clinical course. The 
sudden onset, the high fever, the physical signs, the termination 
are all essentially different. The course of catarrhal pneumonia 
is typical, you have a history of a preceding bronchitis or a 
toxic agent inhaled, or food articles getting into the air pas¬ 
sages, (deglutition or inhalation pneumonia). The fact that 
catarrhal pneumonia is a double sided disease and the spots of 
dullness on percussion will be found to be small, difficult to 
make out and affect only a lobule of the lung. The rales do 
not disappear in catarrhal pneumonia but remain throughout the 
disease, nor is the breathing distinctly bronchial. In catarrhal 
pneumonia we have subcrepitant rales heard both on, in and ex¬ 
piration, whereas in croupous pneumonia we hear a moist rale 
which is heard only at the end of inspiration. 
The diagnosis from pleurisy can frequently not be made as I 
have already indicated that both fibripous and pleurisy with 
effusion are concommitant with this disease. In typical cases 
the history of the disease, the onset, the fever, the cough and 
the physical signs will enable one to come to a correct conclu¬ 
sion. In questionable cases the bacteriological examination of 
