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Beginning with the mineral ingredients in the soil, the food matter may start on its circulation from the soil to the plant, from the plant to the animal, from the animal to the bacterium and from the bacterium through a series of other bacteria back again to the soil in the condition in which it started.
What the disease was or how it was spread is unknown and unknowable at this late date. Virus or bacterium, amoeba or fungus whatever it was, it struck. Symptoms: Lassitude, weariness, weakness, and pain. Signs: Great, ulcerous, wartlike, blood-filled blisters that grew rapidly over the body.
After finding a specific bacterium associated with a disease, it is usually possible to experiment with it further upon animals only.
He showed, just as Pasteur had done in similar cases, that the plague in question was due to the specific poison of a bacterium, and that the disease might be cured by inoculation against it. This he proceeded to do, and the demonstration and good work brought him to the attention of the old Emperor. Dr. Koch was made a member of the Imperial Board of Health in Berlin.
If a pathogenic bacterium succeeds in passing the outer safeguards and entering the body, and if it then succeeds in overcoming the forces of resistance which we have already noticed, it will begin to multiply and produce mischief. This multiplication now goes on for a time unchecked, and there is little reason to expect that we can ever do much toward checking it by means of drugs.
Davaine's bacterium develops exclusively in the blood, and is never found at any depth in the tissues. This is due to the fact that the alga, having need of oxygen in order to live, borrows its flow from the blood, and thus extracts from the globules that which they should have carried to the tissue. The animal therefore dies asphyxiated.
This bacterium develops in so great quantity upon low shores covered with fragments of algæ as to sometimes spread over an extent of several kilometers. These microbes, like many others, continuously mineralize organic substances, and thus exhibit themselves as the indispensable agents of the movement of the matter that incessantly circulates from the mineral to the organic world, and vice versa.
In common parlance, we say that such a tendency to abscesses indicates a bad condition of the blood a phrase which means nothing. Further, we find that the same species of bacterium may have varying powers of producing disease at different times.
"It can't have taken full effect yet, or not even quidine could kill the pain and it carries something like a cross between a fungus and a bacterium that nothing in a standard medikit will touch. How long till your rescue party arrives?" Tarlac frowned; this sounded serious. "Is this Tuesday, or was I unconscious longer than I think?" Dave checked his chrono, then nodded. "2243, Tuesday night."
The ordinary plough was to be followed in this case by a subsoiler, to stir the earth as deep as possible. When the seed was sown, the land was to receive five hundred pounds an acre of high-grade fertilizer, and one hundred pounds an acre of infected soil. The peculiar bacterium that thrives on congenial alfalfa soil is essential to the highest development of the plant.
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