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Updated: May 23, 2025
He further declares that the vocal cords have nothing to do with tone that it is produced by vibration of the mucous membrane of the trachea, larynx, pharynx, mouth; in fact, all of the mucous membrane of the upper half of the body.
DEFINITION. This disease consists of an inflammation of the mucous membrane of the upper air passages, particularly of the larynx with the formation of a false membrane that obstructs the breathing. The disease is most common in children between the ages of two and seven years, but it may occur at any age.
But things have come to such a pass already that to point out to the average American that it is vulgar and also unwholesome to devour with greedy delight all sorts of details about his neighbors' business seems as hopeless and useless as to point out to the currie-eater or the whiskey-drinker the bad effects of fire and strychnine upon mucous membranes.
In man also the clinical features of the chronic variety of the disease are somewhat different from those of the acute form. Here, too, infection takes place through a broken cutaneous surface, and leads to a superficial lymphangitis with nodular thickening of the lymphatics (farcy buds). The neighbouring glands soon become swollen and indurated. The primary lesion meanwhile inflames, suppurates, and, after breaking down, leaves a large, irregular ulcer with thickened edges and a foul, purulent or bloody discharge. The glands break down in the same way, and lead to wide destruction of skin, and the resulting sinuses and ulcers are exceedingly intractable. Secondary deposits in the subcutaneous tissue, the muscles, and other parts, are not uncommon, and the nasal mucous membrane may become involved. The disease often runs a chronic course, extending to four or five months, or even longer. Recovery takes place in about 50
The lungs are made up of an elastic membrane, covered with flat cells, and very abundantly supplied with a mesh-work of the finest blood-vessels. The whole of the respiratory tract as far as the air-cells is lined by mucous membrane. The air consists essentially of 21 parts of oxygen and 79 parts of nitrogen, with a variable quantity of watery vapor.
If you have an attack of inflammation or cold further down, and the vocal bands swell, or the mucous membrane lining the voice box becomes inflamed and thickened, then the voice is lost entirely, just as the tone of a violin would be if a wet cloth were thrown across the strings. But disturbances in the voice box, or larynx, cause only a very small percentage of husky, poor, or unmusical voices.
Heart clots were very common, if not universally present, in cases of ulceration of the intestinal mucous membrane, while in the uncomplicated cases of diarrhea and scurvy, the blood was fluid and did not coagulate readily, and the heart clots and fibrous concretions were almost universally absent.
In the early stage it is 'coryza', or nasal catarrh; but the affection rapidly extends, and seems to attack the mucous membranes generally, determined to some particular one, either by atmospheric influence or accidental causes, or constitutional predisposition. The fits arise from general disturbance of the system, or from the proximity of the brain to the early seat of inflammation.
They move slowly, the back is arched, the appetite poor, the mucous membranes and skin are pale and the hind parts soiled by the diarrhoeal discharge. More acute symptoms than the above sometimes occur. The disease may last from a few days to several weeks. A large percentage of the affected animals die. The treatment is largely preventive.
#Clinical Features.# In pharyngeal diphtheria, on the first or second day of the disease, redness and swelling of the mucous membrane of the pharynx, tonsils, and palate are well marked, and small, circular greenish or grey patches of false membrane, composed of necrosed epithelium, fibrin, leucocytes, and red blood corpuscles, begin to appear.
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