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There is seen in full activity the greatest religious laboratory in the world; there originate, as a rule, the morbid bacilli which invade the rest of Russia; and there do sects grow up like mushrooms, only to disappear with equal rapidity.
The latter is probably the most common method of infection, for the bacilli that are liberated when the flea is crushed may readily be rubbed into the wound made by the flea bite or into abrasions of the skin due to the scratching. Kill the flea, but don't "rub it in."
Being an animal, the plasmodium naturally would not grow upon culture-media like the vegetable bacilli and bacteria, and this very fact had delayed its recognition, but raised at once the probability that it must be conveyed into the human body by some other animal.
There is more danger in certain germs than in lions. Blood-poisoning is to the surgeon a more constant menace than hunger to an Arctic explorer. These students never know what destroyer they may unwittingly unloose. Cross-section of abnormal tissue is more entrancing than a rose-leaf, a cluster of bacilli more beautiful than a snowflake.
If the milk that we drink, and the beef, pork, and poultry that we eat, are liable to convey the infection, what hope have we of ever stopping the invasion? The question is a serious one. But here again a thorough and careful study of the enemy's position has shown the danger to be far less than it appeared at first sight. Even bacilli have what the French call "the defects of their virtues."
Since I must leave England to-night, the model must be destroyed, and unfortunately a good collection of bacilli has already suffered the same fate." Placidly, slowly, and unmoved from his habit of unruffled dignity, Fo-Hi placed the model in a deep mortar, whilst Stuart watched him speechless and aghast.
In some he saw the germs of consumption; in others, affections of the heart. In all, he saw the incessant struggle between the healthy blood-cells and the malignant, omnipresent bacilli that the cells were trying to overcome. Many men and women he saw were in love, and he could tell what all were about to do.
If, however, at the inauguration of the tuberculous disease the bacilli prevail, the infection tends to spread into the tissues surrounding those originally infected, and more and more tuberculous granulation tissue is formed. Finally the tuberculous tissue breaks down and liquefies, resulting in the formation of a cold abscess.
This is one of the factors that helps to explain the apparent paradox, that the dust collected from the floors and walls of tents and cottages in which consumptives were treated was almost entirely free from tuberculous bacilli, while dust taken from the walls of tenement houses, the floors of street-cars, the walls of churches and theatres in New York City, was found to be simply alive with them.
In those parts of the lungs that are not used, slimy secretions accumulate, irritating the air cells and other tissues, which become inflamed and begin to decay. Thus a luxuriant soil is prepared for the tubercle bacillus, the pneumococcus and other disease-producing bacilli and germs.
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