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The objects therefore are all equally magnified, and their relative sizes may be seen. The giant of the series is known as Spirillum volutans; and you will see that the representative species given become less and less in size until we reach the smallest of all the definite forms, and known to science as Bacterium termo.
As you may imagine, it leaves them very debilitated; for no sooner does the victim recover from one attack than another is due. The ticks that are the host of the spirillum, the actual cause of the disease, live in the soft earth on the floor of native huts at the junction of the vertical cane rods and the soil.
"The spirillum!" he muttered. "They are infected with African recurrent fever. The only remedy is atoxyl, administered intravenously, after the manner of Professor Ehrlich's famous '606'." Godowski had rung the call box hastily for a messenger, when Long Sin, who had managed stealthily to creep up to the doctor's laboratory window, scowled, through at the action then moved away.
This definitely destroys the spirillum, and no further attacks of fever result; but this injection, once its work is done, does not confer immunity from other attacks.
The commonest and most fatal of all forms of general diseases of the nervous system are those which are due to the later extensions of general infections. First and foremost stands syphilis, due to the invasion of the blood by a clearly defined spirillum, the Treponema pallida of Schaudinn.
Of course, not every tick is infected, and for that we have to be very grateful. At the height of the fever the spirillum appears in the blood as an attenuated, worm-like creature, actively struggling and squirming among the blood corpuscles. A drop of blood taken from the ear shows hundreds of these young snakes beneath the microscope.
Spirillum cholera: asiaticae Croupous pneumonia. Micrococcus pneumonia crouposa. Diphtheria. Bacillus diphtheria. Glanders. Bacillus mallei. Gonorrhoea. Micrococcus gonorrhaeae Influenza. Bacillus of influenza. Leprosy. Bacillus leprae. Relapsing fever. Spirillum Obermeieri. Bacillus tetani. Typhoid fever. Bacillus typhi abdominalis.
During this century of wonder a sufficiency of exactness was, however, introduced into the study of microscopic organisms to call for the use of names, and we find Muller using the names of Monas, Proteus, Vibrio, Bacillus, and Spirillum, names which still continue in use, although commonly with a different significance from that given them by Muller.
It is the spirillum Obermeieri," said Kennedy, "the germ of the relapsing fever, but of the most virulent Asiatic strain. Obermeyer, who discovered it, caught the disease and died of it, a martyr to science." A shriek of consternation rang forth from Samarova. The rest of us paled, but repressed our feelings. One moment," added Kennedy hastily. "Don't be unnecessarily alarmed.
In its most general sense, the term microbe designates certain colorless algæ belonging to the family Bacteriaceæ, the principal forms of which are known under the name of Micrococcus. Bacterium, Bacillus. Vibrio, /Spirillum, etc.
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