LYMPHANGITIS. 371 
of other forms of lymphangitis which we will study further on. Glanders, 
distemper, tuberculosis, carcinosis produce specific angioleucitis. 
The prognosis of those affections depends specially on their nature and 
the activity of the microbe that has caused it. When pathogeneous 
agents have but little virulence, the process has a tendency to subside, the 
morbid contents of the lymphatics is easily resorbed. Very active 
microgerms may, on the contrary, bring on suppuration or gangrene. The 
close relations between lymphatics and the serous system explain the com- 
plications of hygroma, synovitis, arthritis, peritonitis, which are some- 
times observed. , 
Traumatic lymphangitis, the most interesting to the practitioner, is 
common in horses. We will give to it our special attention. 
L—Traumatic Lymphangitis. 
This form may succeed all solutions of continuity of the skin. It is 
often seen in the withers, the shoulder, the neck, which are so com- 
monly the seat of traumas. A simple abrasion, the prick of a dirty lancet, 
are sufficient for its development. It ordinarily begins by a reticular 
angioleucitis, accompanied with great sensibility, bristling of the hair, cede- 
matous swelling of the skin; and soon the trunks and the collecting glands. 
are affected. 
There is a form of lymphangitis, specially frequent in the hind ex- 
tremities of horses, characterized principally by the suddenness of the 
invasion and the intensity of the first symptoms. A horse in perfect. 
health in the evening is found the next morning dull, feverish, hanging his. 
head, with a more or less marked and very painful swelling of a hind leg. 
The lameness is intense, the animal moves with difficulty and carries its leg 
in abduction. By examination, an cedematous swelling, painful in pro- 
portion to the severity of the attack, is detected on the internal face of the 
extremity. Appetite is partly or entirely gone. The following days, the 
swelling keeps on increasing until it assumes the form of a shapeless post. 
This sudden appearance of the affection and the great sensibility of the 
internal face of the hind leg are characteristic of the infectious inflamma- 
tion of the lymphatics; most ordinarily, they justify the diagnosis of this so 
frequent variety of angioleucitis. Old writers, among them Solleysel and 
Garsault, attributed it to the bite ofthe “shrew mouse.” Lafosse refuted 
this error; he thought it to be a variety of anthrax, against which he 
recommended scarification and repeated emollient lotions. In a paper 
addressed to the Société Centrale (1862), Mottet described the disease 
under the name of “ Zarsopathy and Metatarsopathy, or the diffused in- 
flammation of the tarsus and metatarsus.” The discussion which followed 
