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Updated: May 28, 2025
They gain an entrance through the lungs, food canal, or skin, and, living upon the fluids and tissues, multiply with great rapidity until they permeate the entire body. Not only do they destroy the protoplasm, but they form waste products, called toxins, which act as poisons. Diseases caused by germs are known as infectious, or contagious, diseases.
Only the infectious mettle of the British officer can infuse into all ranks that cheerful alertness which, at a time of epidemic, is the finest safeguard in the world.
There the family history with reference to nervous and other diseases, the history of the patient himself, the infectious diseases which he has passed through, his habits and anomalies, his use of alcohol and of drugs, his experiences in social life, the demands of his profession, his recent troubles and their first origin are to be recorded carefully.
The security of property, the sincerity of intercourse were gone; all the ties of interest were dissolved; all of blood and of affection were irreparably broken. An infectious distrust envenomed social life; the dreaded presence of a spy terrified the eye from seeing, and choked the voice in the midst of utterance. No one believed in the existence of an honest man, or passed for one himself.
Joe, having safely disposed of the muffles, gave himself up to unrestrained laughter, throwing back his head, slapping his knees and repeating at intervals, "Self-starter, by gar!" So infectious was his laughter that the whole company joined in. "Cut it out, boys," said Nora. "You are all talking rot, you know; and what about you," she added, turning swiftly upon her sister.
Crawley is a fascinating woman; I never tire watching her. Very pretty, very smart with a pretty wit, she has the most delightfully gay, infectious laugh, which contrasts oddly with her curiously sad, unsmiling eyes, Mrs. Wilmot has a Madonna face.
"Hast caught the infectious terror of the infant-scaring, bugbear Hebrew?" Rameses asked. Menes leaned against the nearest knee and smiled lazily. "If the gray-beard sorcerer did meet me in open field, protected only with bull-hide and armed with a spear, I would fight him till he said 'enough'; but who wants to go against an incantation that would mow down an army at the muttering?
What is conjunctivitis? Give causes and treatment. What is "moonblindness"? Give the symptoms. Describe the symptoms of infectious ophthalmia of ruminants and the treatment. The bones meet and form joints or articulations. These are divided into three classes: movable, mixed and immovable. Nearly all of the articulations in the extremities belong to the movable class.
The answer to this strikes the keynote of our modern knowledge of infectious disease, namely, that while an invading germ is necessary, a certain breaking down of the body defenses and a lowering of the vital resistance are equally necessary.
If this view be well founded, then the advance of modern civilization would tend to furnish a more and more favorable soil for the spread of this disease. This, unfortunately, is about the conclusion to which we are being most unwillingly driven. Almost every other known infectious disease is diminishing, both in frequency and in fatality, under civilization. Pneumonia alone defies our onslaughts.
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