. Diseases of cattle, sheep, goats and swine. Veterinary medicine. ACTINOMYCOSIS OF THE MAXILLA. 673 it more frequently attacks some parts of the body than others, and by far the greater number of cases occur in the ACTINOMYCOSIS OF THE MAXILLA. Actinomycosis of the maxilla attacks young animals, and its usual seat is in the molar region, although occasionally it affects the incisors. The earliest symptoms consist in swelling of the bone, which may be overlooked if within the mouth, but the outline of the jaw soon becomes deformed, generally in the middle region of the row of molars. Some
. Diseases of cattle, sheep, goats and swine. Veterinary medicine. ACTINOMYCOSIS OF THE MAXILLA. 673 it more frequently attacks some parts of the body than others, and by far the greater number of cases occur in the ACTINOMYCOSIS OF THE MAXILLA. Actinomycosis of the maxilla attacks young animals, and its usual seat is in the molar region, although occasionally it affects the incisors. The earliest symptoms consist in swelling of the bone, which may be overlooked if within the mouth, but the outline of the jaw soon becomes deformed, generally in the middle region of the row of molars. Somewhat tender and firm to the touch at first, the tumour gradually increases in size, invades the deeper regions of the skin, and displays fluctuation at one or two points, followed by abscess formation. The pus discharged may be white, creamy, and inofl^ensive, but the cavity of the abscess shows no tendency to cica- trise, and the opening through which the pus has escaped is transformed into a fistula. From this moment the pus dis- charge is of a greyish, sanious nature, and contains a greater or less number of little yellowish grains. It soon acquires an offen- sive odour, and the fistulous opening is surrounded by exuberant granu- lations, forming a fungoid mass. The neighbouring tissues become hardened and lose their sensitive- ness, the jaw becomes completely deformed, and a condition is set up which the old writers considered as true cancer of the jaw or maxillary osteosarcoma (Fig. 268). A probe passed into the fistula penetrates deeply, usually into the thickness of the jaw itself, and however carefully manipulated injures the diseased tissues and causes free bleeding. If neglected, these lesions become steadily worse, mastication is more difficult, being possible only on the healthy side, and the animals lose condition and eventually die of exhaustion. The external lesion, repre- sented by the fungoid mass, increases in size, assumes a blackish colour, and discharges an
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectveterin, bookyear1920
