EPIZOOTIC PLEURO PNEUMONIA. 
69 
restless — expresses much pain on lateral pressure of the walls of 
the chest — the fore legs are abducted — respiration becomes more 
difficult — expiration is accompanied by a loud grunt or moan. In 
a few cases there is a great inclination in the animal to retain a 
recumbent position, and he generally lies in preference on the 
affected side, with the nose protruding. 
The disease often continues to increase, despite of all our treat- 
ment. In such unfavourable cases the pulse becomes rapid, thready, 
and irregular ; tumours appear in various parts of the body, but 
mostly along the course of the trachea, from a deposition of sero- 
albuminous lymph into the cellular tissue, and often to such an ex- 
tent as to materially interfere with deglutition and respiration. 
The eyes become dull and sink in their orbits— -there is rapid 
wasting of the whole frame, with continual discharge of ropy saliva 
from the mouth — uncontrollable diarrhoea, the respiration gasp- 
ing, and the pulse imperceptibly quick, until the poor animal sinks 
into a state of gradual asphyxia. 
In other cases this disease assumes a still more obscure and fatal 
type nothing being observed to indicate danger until a few days 
or even hours before the animal dies, and, in all, the lungs have 
become extensively solidified before the malady is detected. In 
such cases there appears in the system a general morbid condition 
in a more or less latent form, and with a marked prostration of the 
vital energies, and fever of a low typhoid character. The pulse is 
from the commencement soft, quick, and small — great depression 
and langour — respiration quick and deep — the animal groaning 
at every expiration — the coat staring — the skin dry — the faeces 
generally fluid, black, and offensive — the breath then becoming 
cold, as are also the extremities. In such a case the animal rapidly 
sinks. 
Auscultation . — In the early stages there is indistinctness of the 
respiratory murmur in the diseased parts, and at the parenchyma of 
those parts the lungs become gorged with serum and lymph, and 
the air-cells are gradually obliterated ; but as the larger tubes re- 
main pervious, and the condensed lung is forced against the walls 
of the chest, bronchial respiration may still be distinctly heard in 
the central regions of the chest during each inspiration. The sound 
emitted resembles that of a sudden rush of air through a tube of 
considerable dimensions, or that of a blacksmith’s bellows when 
gently blown. The detection of this sound is easy, and at the 
same time of importance, from its being a constant unequivocal sign 
of organic alterations in the lungs or pleura. In the latter stages 
the respiration becomes quite tracheal. 
The increased density of the lung, and pleuritic effusion, deaden 
the natural sound elicited by percussion, and effusion into one 
VOL. XVIII. L 
