358 
H 1 PPO-PATHOLOGY. 
body, particularly when heated, checking or suppressing perspira- 
tion, will be likely, on the principle of derivation, to throw an in- 
flammation upon the bronchial membrane. A disordered state of 
the bowels may induce the same by sympathy. It is this known 
sympathy between the two membranes which deters us from giving 
aloes or any thing likely to irritate the bowels in bronchitis : being 
certain to be troubled with diarrhoea if we do. In addition to all 
this, bronchitis may be caused by other disease, and especially of 
the lungs or pleura. Moreover, it is a common accompaniment 
of epidemic catarrh. It every now and then supervenes upon 
strangles. 
The Symptoms of an attack of acute bronchitis vary commonly 
in their nature, as well as intensity : in an ordinary case they are 
as follow : — the horse manifests dulness and defective (rarely com- 
plete loss of) appetite, accelerated pulse, skin and legs rather warm 
than cold, mouth warm and moist, Schneiderian membrane red- 
dened. He coughs occasionally, hard and dry, and probably evinces 
some soreness about the throat. Next, his breathing becomes dis- 
turbed, short and quickened, but neither deeply nor painfully drawn ; 
and occasionally accompanied with a sort of rattle or sighing noise. 
Either there is no flux whatever from the nose — in which form the 
disorder is called dry catarrh , rather a contradiction of terms — or 
else there is a scanty exudation of thin aqueous fluid, or of a gluti- 
nous yellow-looking thick matter. As soon as the inflammation 
begins to abate, the flux from the nose becomes augmented and 
turns of a mucous character. The pulse averages from 60 to 70, 
and is in general soft, and at the jaw not very perceptible ; and 
yet it will bear repeated abstractions of blood before it will give 
way. 
The EPIDEMIC variety of bronchitis is remarkable for the 
emission of copious fluxes from the nose, at one time turning yel- 
low, at another green, and then again white. In this form the dis- 
order is exceeding apt to assume the chronic type, and, after conti- 
nuing for a length of time, to leave the animal reduced in flesh, and 
much debilitated. 
Chronic Bronchitis now and then succeeds the acute; oftener 
however in its epidemic form than otherwise. At times it is of 
itself an idiopathic disease. In some old horses we meet with 
what is called “ chronic cough” — a cough resembling a sound emit- 
ted from some deep cavern, occasionally accompanied with short- 
ness of breath, and a discharge of sero-mucous matter from the 
nose, which is augmented in the act of coughing. Added to these 
symptoms, should a wheezing noise or rale be detected by the ear 
in the bronchial passages, we may safely set the case down as 
chronic bronchitis. 
