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The germ of tuberculosis is probably conveyed oftenest through the sputum of consumptives, when this sputum has been allowed to dry, has become pulverized and is breathed into the system. All sputum should be burned. It is well to avoid rooms occupied by consumptives who are not careful with their sputum.
[Sidenote: Mosquito-borne Malaria and Yellow Fever]
Suitable wire netting will guard us from malaria and yellow fever, the infections brought by mosquitoes and flies. The mosquito often carries malaria, and in the tropics carries yellow fever and other diseases. As some one has said: "A yard of screen in the window is better than a yard of c.r.a.pe on the door." The greatest triumph in connection with the building of the Panama Ca.n.a.l was not the engineering but the reduction in the death-rate among the workers, which, on account of these insect-borne diseases, had previously prevented the successful execution of the undertaking.
Not only is it desirable to screen from mosquitoes, but to put oil on any body of water where they breed. Even a small puddle can breed millions of mosquitoes. No empty tin cans should be allowed to collect about the kitchen door; they gather rain-water and soon breed mosquitoes.
[Sidenote: Typhoid-free Water]
We take in many disease germs through food or drink. Every year 300,000 people in the United States enlist under the typhoid banner. To elude the typhoid-germ we need first of all pure water. But when one is in doubt as to the purity of water, it is advisable to boil water in order to destroy possible typhoid germs and other dangerous germs and impurities. Where hygienic water has been used a very large proportion of the deaths from typhoid has been eliminated. Where this is not feasible, it is desirable to use chlorinated lime (ordinary bleaching powder) in the drinking water (one part to 200,000--shake up and leave several minutes). If water of doubtful quality has to be drunk, it should be at the middle or end of a meal when the healthy stomach contains plenty of gastric juice, which to a limited extent has the power to kill germs.
It is safer to keep out of swimming tanks that are not filtered or refilled constantly, or chemically purified as by chlorinated lime.
[Sidenote: Typhoid-free Milk]
Another measure for avoiding typhoid is to pasteurize milk. Food that is liable to contain typhoid or other dangerous germs, such as raw oysters, and milk from typhoid-infected localities, should be avoided.
[Sidenote: The "Typhoid-fly"]
In protecting the food against all kinds of impurities which injure the body, we must remember that the carrier of typhoid fever, the common house-fly, deposits typhoid germs on the food, through which the germ is taken into the system. The most effective method of fighting flies is by preventing their breeding. Their favorite places for this are horse-manure, but they will breed in almost any ma.s.s of fermenting organic material. Manure piles and stables should be screened, and the manure removed at least once in seven days. Garbage-pails should be kept tightly covered. Fly-paper and fly-traps should be used. Houses should be screened, and, in particular in the pantry, the food itself should be screened. Flies are usually thirsty in the morning. By exposing a saucer of one per cent. of formalin solution, the flies will be tempted to drink this morning c.o.c.ktail and pay the death-penalty.
A fly-trap has been invented by Professor Clifton F. Hodge, of the University of Oregon, Eugene, Ore., which any one is free to construct and which, if used universally about stables early in the season, would greatly help toward banis.h.i.+ng the fly altogether.
Flies occasionally gain entrance to the house in spite of the most careful screening. The fumes of burning Pyrethrum powder (Persian insect powder), used in the proportion of 2 lbs. per 1,000 cubic feet of air s.p.a.ce, will either kill or stupefy flies and mosquitoes, so that they may be swept up and effectually destroyed. It may be distributed in pots and pans, and ignited after sprinkling with alcohol.
[Sidenote: Other Vermin]
Ticks should also be carefully exterminated, as they are sometimes responsible for such diseases as Rocky Mountain spotted fever, African tick fever, and other infections. The bedbug is also by no means the harmless creature which it is generally regarded. To its credit are placed such maladies as relapsing fever. The flea has been responsible for such terrible diseases as the plague. It often operates by means of rats as its carrier to the human being. The louse is one of the direst offenders in the insect line, as it must take the responsibility not only for many cases of typhoid fever, but for the dread plague of typhus, which is ravaging the European armies.
[Sidenote: Hookworm]
Hookworm disease is to be avoided by not treading barefoot on ground polluted by victims of the disease, by preventing soil-pollution through the proper disposal of human excrement, and by screening all water-closets.
[Sidenote: Cleanliness]
Cleanliness is important for avoiding infections, and bathing is important for cleanliness. The hands, the face, and finger-nails should be kept clean, especially before meals. Any cut or crack in the skin or mucous membrane may let in germs when the spot is dirty or is touched by dirty hands. This is why surgeons are so scrupulously clean.
Super-cleanliness probably also explains the extraordinarily low mortality of Jewish rabbis as a cla.s.s.
The need of cleanliness is particularly great for those who work in factories, mines, and other places where dirt is likely to be carried to the mouth by the hands. Probably many diseases get a foothold in this way without the victim realizing in the least that they were due to his carelessness and lack of cleanliness.
Here, as elsewhere, esthetics and health go hand in hand. A person who does not bathe daily is pretty certain to carry on his skin some perspiration which, while he may be unaware of it, gives forth an offensive odor.
[Sidenote: Perspiration]
Cleanliness is promoted by perspiring prior to bathing. Every one knows the exhilaration which follows a healthy perspiration. Of course, the most beneficial method of securing perspiration is the method applied to the trotting horse--vigorous exercise. In fact, one of the benefits of exercise is perspiration. When a person can not or will not take exercise, perspiration can be induced by hot baths. Such extreme measures ought not, however, to be taken too often. How often will depend on the corpulence and other circ.u.mstances of each individual.
Sweating may be overdone, and should never be pushed to the extent of exhaustion. The function of the skin in removing wastes from the body is much less important than formerly supposed. The advice of a physician is desirable. It should be remembered that all of us perspire insensibly as well as visibly.
[Sidenote: s.e.x Infection]
Some of the most serious and widespread although usually unmentioned infections are those from the venereal diseases, with a whole train of terrible consequences, such as blindness, joint-diseases with heart-complications, peritonitis, paralysis, and insanity. They are to be avoided by living a life hygienic and clean, not only in body but in mind and heart. From even the narrowest interpretation of hygiene, a decent life is necessary for the maintenance of health. This is a special subject on which most people are extremely ignorant. It is seldom realized, for instance, that _all prost.i.tutes are diseased_. This was found to be the case in an investigation in Glasgow.
Dr. Rosenau says: "Every boy and girl, before reaching the age of p.u.b.erty should have a knowledge of s.e.x, and every man and woman before the marriageable age should be informed on the subject of reproduction and the dangers of venereal diseases. Superficial information is not true education. On the other hand, it is a mistake to dwell unduly upon the subject, for in many instances the imagination and pa.s.sion of youth are inflamed by simply calling attention to the subject."
The Life Extension Inst.i.tute can furnish special pamphlets covering this important topic.
The loss of citizens to the State from the sterilizing influence of gonorrhea upon the productive energy of the family, and the blighting destructive effect of syphilis upon the offspring offer extremely serious problems for preventive work.
Section IV--Teeth and Gums
There is one source of poisoning and infection so universal as to need special mention. This is infection through the mouth. Considered from the standpoint of efficiency, the modern mouth is out of adjustment with modern conditions--or, perhaps we should say, modern conditions are out of adjustment with it. Notwithstanding the numerous bacteria that flourish within its portals, mouth secretions and the mucous membranes do not seem to have the protecting power which is often manifest in other regions of the body and which protects an animal in a state of nature. Wild animals are not subject to caries or dental decay, as are man and domesticated animals.
[Sidenote: Mouth-dangers]
There are two forms of mouth-danger that should be clearly differentiated. Dental caries, or decay, is at first largely a chemical process and affects the tooth proper. Pyorrhea, or Riggs's disease, affects the tissues surrounding the root of the tooth, and is accompanied with infection by pus bacteria, and possibly also by animal parasites, termed endameba. Scrupulous cleanliness of the mouth largely prevents both of these maladies.
[Sidenote: Dental Decay]
In caries, or dental decay, plaques or films of mucin from the saliva form on the tooth-surfaces and enclose bacteria and particles of carbohydrate food, which undergo fermentation with the formation of lactic acid, which dissolves the lime salts on the surface of the teeth, leaving only the organic matter. This organic matter is then attacked by bacteria. Putrefaction sets in, and you have a cavity. This cavity is, of course, a menace, as it harbors various forms of bacteria, which may infect the general system through the root ca.n.a.ls, or the digestive system by being swallowed with the food, and also gives rise to abscesses at the root-tips.
[Sidenote: Pyorrhea]
Pyorrhea is an infection of the gums or tooth-sockets. It begins beneath the edges of the gums that have been injured and especially where there has been an acc.u.mulation of tartar or lime-deposit. As the infection progresses and destroys the membranes that attach the root of the tooth to the socket, a pocket is formed around the root, and the tooth becomes loosened. It is said that this disease is responsible for far more loss of teeth than is decay.
[Sidenote: Systemic Injuries from Mouth Infection]
But this is not the only evil. In the pocket pus is continually being formed and discharged into the mouth and swallowed. Also, as the teeth rise and fall in their diseased sockets in ordinary chewing, bacteria are forced into the circulation and may be carried to distant parts, where they work harm according to their nature, selecting tissues for their operation in which they can best thrive.
[Sidenote: Focal Infection]
It was formerly supposed that the ill effects from such conditions as dental abscess and other pus foci were wholly due to the toxins or poisonous products thrown into the blood-stream by the bacteria at the focus. It is now known, however, that the bacteria migrate into outside tissues through the blood- and lymph-streams. In joint affections, they clog and obstruct the small blood-vessels, interfering with the nutrition of the joint-tissues, causing deformity and enlargement, as in arthritis deformans, as well as in acute inflammation, such as rheumatic fever. Indeed, this condition of subinfection, or "focal infection," is coming to be recognized as a far more important cause of disease than the time-honored autointoxication, a term which has been greatly abused and misused.
[Sidenote: Autointoxication]
The term "autointoxication" should properly be restricted to conditions where poison arises from changes in the tissues or in the activities of cells or organs, whereby substances are released into the circulation in quant.i.ties harmful to the organism; in other words, where the secretions of the body are altered, either in character or quant.i.ty, to such a degree as to cause injurious effects, such as overactivity or underactivity of the thyroid gland, or suprarenal gland.
The poison from undigested food, or from decomposing intestinal contents, should be termed "intestinal intoxication," or "toxaemia,"
rather than "autointoxication," or "self-poisoning," as it is actually due to infection from outside sources. Intestinal toxemia is, no doubt, a fairly frequent cause of illness, but it has lately been shown that stagnant bowels may cause true infection by micro-organisms that penetrate the tissues, and that many conditions ascribed to intestinal stagnation and the resultant chemical poisoning may actually be due to focal infection, or subinfection, arising in other regions.
The light that has lately been thrown on chronic sources of focal infection has cleared up many of the mysteries surrounding the causation of certain obscure affections--chronic rheumatism, arthritis deformans, certain forms of anemia, goitre, chronic heart and kidney troubles, diabetes, ulcer of the stomach, duodenum, etc., and other forms of chronic disease, especially those that have proved resistant to known methods of treatment.
[Sidenote: Lowered Resistance]
There are many cases where the so-called focus has apparently become established because of general bodily neglect and a general lowering of resistance, in which the focus, even though it be the mouth, has partic.i.p.ated, and permitted the successful activities of germs or parasites. After the focus has been established, however, it is often an important and may be a deciding factor in keeping up the general diseased condition of the body.
This principle of focal infection, well established as it is, should not be accepted too literally, or given too wide an application, but no one can question the importance of preventing the bacterial hosts of the mouth from getting into the system, or the importance of getting them out, if we have unwarily permitted them to enter.
All the ills that flesh is heir to are not caused by mouth-infection, but enough of them are to more than justify a vigorous and world-wide campaign for the better care of the teeth and for a thorough search for mouth-infection in every case of obscure disease.