Text book of veterinary medicine, Volume 4 (of 5)Law, James
Science
Text book of veterinary medicine, Volume 4 (of 5)
Law, James
Veterinary medicine
The _lesions of the pituitary membrane_ are varied. Hyperæmia of a
purple or violet color is common, especially along the septum, and the
mucosa is liable to be somewhat tumid or œdematous. Nodules the size of
a pin’s head, a pea or larger appear inside the inner ala, or on the
septum or turbinated bones, and at first red from extravasation and, as
it were vesicular, become grayish, whitish or yellow with points of red
and surrounded by a deeply congested areola. Larger nodules forming in
the submucosa approach the surface and stand out the size of the tip of
the finger and with the same general character as the smaller. Sooner or
later these degenerate and form ulcers which bear a resemblance to those
of acute glanders but are less angry, and when small and solitary may be
taken for simple erosions. In other cases they become thickened and
indurated with sharply defined projecting margins, and a yellowish base
with points or lines of red. The presence of red, black, green, or brown
crusts may also be noted.
Another lesion frequently observed in indolent cases is a cicatricial
white spot or patch in which the hyperplasia has become partially
developed into tissue and shows no tendency to ulcerate. The mucosa may
even be drawn or puckered around the cicatrix, making the illusion all
the more complete.
The _submaxillary swelling_ is even less sensitive than in acute
glanders and produces the same sensation as of an aggregation of small,
hard, pea-like, masses with no tendency to ulcerate.
_Symptoms of Cutaneous Glanders (Farcy) in Solipeds._ Acute cutaneous
glanders has been already referred to under nasal glanders. The chronic
type is often less characteristic, yet may be detected by careful
observation of the symptoms. The main symptom may be the swelling of a
joint with more or less engorgement of the limb from attendant
lymphangitis. There can usually be detected around the margins of such
swellings firm, tender cords representing the larger lymphatic vessels
and often branching in their course. In the absence of the engorgement,
or when it is slight, these _cords_ may be the main evidence of the
disorder, and in the hind limb usually follow the course of the flexor
tendons on the inner side of the digit, metacarpus and thigh. At
intervals along the line of the _cords_ appear nodular masses (farcy
buds) varying in size from a pea to a hen’s egg, and showing a great
disposition to soften and discharge a glairy, sanious or more or less
bloody liquid. The inner sides of the fetlock and tarsus are favorite
seats of these nodules but they may form at any point. On the trunk also
the corded lymphatics and nodules follow the lines of the veins and
lymphatics, and here there may be the complication of large
intermuscular abscesses often in connection with the groups of lymphatic
glands.
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