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So that there could be micro-organisms on the new planet which could be harmful. But on the other hand, either they would be familiar in the toxins they produced and human bodies could resist them or else they would be new compounds to which humans would react allergically. Basically, then, if anybody on the ship developed hives, they had reason to be frightened.

But there surely had been no time for such micro-organisms to develop, even in the almost tropic heat of the Novella. Could she have been poisoned by these phosphorescent bacilli? What was it a strange new mouth- malady that had attacked this notorious adventuress and woman of luxury? Leslie had flashed up the light again before Craig spoke. We were all watching him keenly.

If an egg remains in a dirty nest, defiled with the micro-organisms which cause typhoid fever, carried there on the hen's feet or feathers, it is not strange if some of these bacteria occasionally penetrate the shell and the egg thus becomes a possible source of infection.

The chemical destruction of the food material which results from the action of the putrefactive bacteria is too thorough, and the nitrogen foods are not yet in condition to be used by plants. Now comes in the agency of still another class of micro-organisms, the existence of which has been demonstrated to us during the last few years.

It has been shown positively that acute endocarditis is due to micro-organisms, generally streptococci, staphylococci or pneumococci, and, more frequently than once believed, gonococci. The most frequent causes are acute rheumatic fever, diphtheria, pneumonia, cerebrospinal meningitis, scarlet fever, erysipelas, influenza, chorea, gonorrhea, sepsis and typhoid fever.

The atrophying muscles of the digestive tube, unable to hurry on the mixed products of indigestion; fermentation; and micro-organisms inciting fermentations and elaborating toxic alkaloids, poison and disorder the functions of life. Man's outdoor life enables him to escape many of these evils.

Then there is a long list of other epidemic diseases, such as smallpox, measles and scarlet fever, the exact cause of which has not been determined. Many of these are believed to be due to micro-organisms of some kind, and if so they will almost certainly sooner or later be found.

Some foods, of course, withstand the attacks of micro-organisms for longer periods of time than others. For example, most fruits that are protected by an unbroken skin will, under the right conditions, keep for long periods of time, but berries, on account of having less protective covering, spoil much more quickly.

The existence of grave constitutional disease, such as Bright's disease, diabetes, syphilis, scurvy, or alcoholism, also impedes healing. Infection by disease-producing micro-organisms or pathogenic bacteria is, however, the most potent factor in disturbing the natural process of repair in wounds.

The micro-organisms are present wherever there is life and are as necessary to life as they are to death. Ochsner states that in nearly all instances the disease can be traced to the common colon bacillus, which is always present when the intestine is normal.