314 
MALIGNANT ItVLK OF SWINE. 
CLASS II. 
This comprises the swine in which the progress of the disease 
is less rapid, and the successive stages of which can be distin¬ 
guished. The symptoms are less alarming, and the disease less 
obstinate* The animal is dull—always lying down — the ears 
hot and tender—the pulse quick, but regular—the conjunctiva 
red—the respiration disturbed—the flank swollen and tender— 
the tail hanging down—the animal takes even his most favourite 
food without appetite—he drinks with difficulty—he is consti¬ 
pated. This state sometimes continues two days without any 
particular change; but on the third or fourth day, at the 
latest, if the treatment has not been successful, the symptoms 
increase in intensity—the hog grinds his teeth—he trembles all 
over—he is convulsed—the pulse becomes intermittent—it dies 
away from time to time—the pupil becomes dilated—red spots 
appear; they acquire a deeper colour, and death is not far off. 
Post-mortem examination .—The appearances after death bear 
considerable resemblance to those of the first class, but the al¬ 
teration of the tissues is more decided ; the membrane of the 
nose and mouth is sometimes decomposed, and the palate pre¬ 
sents black and ulcerated spots. 
Sows that are pregnant escape the attack of this malady, but 
when they have produced their young they lose this immunity, 
and the young pigs very soon follow the mothers. Swine 
affected with leprosy seldom labour under this disease. 
Causes .—Bad food and faulty construction of the styes are 
the chief causes of this malady. In fact, the food on which 
swfine are usually fed—as remnants of bad bread soaked, the 
refuse of fruits or grain rotten or spoiled, the fermentation and 
decomposition to which farinaceous substances are liable, and 
especially the bran which is so often given to them—are causes 
the continued action of which must produce great disorder in the 
animal economy. On the other hand, their lengthened confine¬ 
ment in a close place, and their lying on dungheaps which exhale 
the most deleterious gases, and also long journeys over miry or 
parched roads, and where they have been long exposed to the 
rigour of the seasons, must produce some functional derange¬ 
ments, wdiich cannot fail of being injurious, especially when, 
after they have arrived at the destined farm, they are exposed to 
wet, or w r allow all the day amidst acrid and disgusting matters. 
I could refer to many farms and whole hamlets where the pigs 
were confined, during six months, in a close stye, and where the 
disease was seldom long absent; but I acknowledge that I have 
