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It has a discharge from the eyes, and a fetid, sanious discharge from the nose. Not infrequently, it coughs up disorganized lung-tissue and putrid pus. Great prostration, and, indeed, typhus symptoms, set in. There is a fetid diarrhoea, and the animal sinks in the most emaciated state, often dying from suffocation, in consequence of the complete destruction of the respiratory structures.
The respiratory organs in mammals are the mouth, nose, larynx, trachea, bronchial tubes, and lung-tissue or air-cells proper. The windpipe is made up of cartilaginous rings completed by membrane, muscle, etc. The bronchial tubes are the continuation of the windpipe, and branch tree-like until they become very fine. The air-cells are built round these latter. The lung-tissue is highly elastic.
The blood goes to the lungs where it irritates the delicate mucous membrane. In self-protection it begins to secrete an excess of mucus and if the irritation is great enough, pus. The various bacteria are incidental. The tubercular bacillus is never able to gain a foothold in healthy lungs, but after degeneration of lung-tissue has taken place the lungs furnish a splendid home for this bacillus.
So complete is this solidification that sections of the attacked lung, instead of floating in water as normal lung-tissue will, sink promptly. The severe pain usually subsides soon, but the fever, rapid respiration, flushed face, with or without delirium, will continue for from three to seven or eight days. Then, as suddenly as the initial attack, comes a plunge down of the temperature to normal.
In the animal of complicated structure special mechanisms are necessary that the essential oxygen be brought to the blood and the useless carbon dioxide removed. The respiratory organs or tract include the mouth, nose, larynx, trachea, bronchial tubes, and the lung-tissue proper or the air-cells.
On slicing the lungs in these cases, hepatization is observed, presenting a very peculiar appearance, which is, in a great measure, due to the arrangement of the lung-tissue in cattle.
"I can give you some idea, of course," said Dr. Gurnet; "but if you take any more violent or irregular plunges, you may very greatly shorten your time. Should you insist on remaining in your regiment and doing your work, you have, I fancy, about two years more before a complete breakdown. You are a very strong man, and your lung-tissue is tough.
The man continued to improve rapidly, the emphysema disappeared on the seventh day, and eighteen days after the reception of the wound he was discharged. There was slight hemorrhage from the wound at the time, but the clot dried and closed the wound, and remained there until it was removed on the morning of his discharge, leaving a small, dry, white cicatrix. Loss of Lung-tissue.
Microscopically small had been the edges of the lung-tissue touched by the frost, but they now began to slough off, giving rise to a dry, hacking cough. Any unusually severe exertion precipitated spells of coughing, during which he was almost like a man in a fit. The blood congested in his eyes till they bulged, while the tears ran down his cheeks.
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