262 PNEUMONIA. 



depend upon the vital state of the organism, and upon the 

 extent of tissue locally aifected. 



The patient may remain as above described for three or four 

 days, when all the violent symptoms will slowly subside, and 

 the health of the invalid be gradually restored ; or the structures 

 diseased may become solid or hepatized, and from the enfeebled 

 state ot the system, and the great extent of solidification, death 

 may result. 



It is seldom the animal thoroughly recovers after hepatiza- 

 tion of the organ is established, especially if it be extensive ; 

 in which case the patient either dies, or remains Tliich Winded. 



Pathognomonic Symptoms. — The Pathognomonic Symp- 

 toms are — the presence of a soft mucous rattle, or loTiat Laennec 

 calls the moist crepitus ronchus, ivithin the lung a-ffected. 



"While treating upon the symptoms of the disease, it may 

 prove of advantage to the reader if I enumerate those which 

 are prominent in other maladies of a similar class ; and for 

 which Pneumonia may be mistaken. 



Pneumonia " may be confounded with Catarrh, Bronchitis, 

 or other phlegmasia of mucous membranes. In Epizootic 

 Catarrh, the extremities do not continue invariably cold ; the 

 distress of countenance is not so great ; sore throat is commonly 

 present ; the breathing, though quickened, is less laborious, and 

 the pulse oppressed. The cough in Catarrh is generally deep, 

 sonorous, and very painful ; and a weakness, not corresponding 

 with the violence of the symptoms, is very early seen in the 

 complaint." 



" Pneumonia has also been mistaken for Colic, from the 

 horse sometimes expressing considerable uneasiness, and often 

 looking round to his sides ; but in Colic the horse e^dnces acute 

 pain, by stamping with his fore feet, or kicking at his belly with 



