BACTERIA- VIRUSES infections and bodily defences

BACTERIA

Visible only under a microscope, bacteria are so tiny that you may best get an idea of their size through an analogy: If you can imagine for a moment that all eight million inhabitants of New York City are reduced to the size of bacteria, all eight million would fit comfortably into a single drop of water. Different types of bacteria differ considerably in size, shape, and habits. 

For example, streptococci form chains like strings of beads; others, such as those that produce boils, live in clusters, like bunches of grapes. Bacteria have a bad press, which only some of them deserve. More of them are beneficial than destructive. Bacteria, for example, are industrious workers in sewage plants, helping to dispose of waste.

Bacteria, too, help the growth of many plants on which all other plants and animals depend. But certainly life would be more pleasant without those varieties that cause syphilis, pneumonia, boils, abscesses, strep sore throats, tuberculosis, and many other diseases.

VIRUSES 

Far smaller even than bacteria; viruses are not visible under an ordinary microscope, only under the far more powerful electron microscope. Much that is known about viruses has been learned only recently. Once considered nonliving bits of matter, they are now regarded as the lowest forms of life-parasites that do not grow unless they can occupy living cells in which they set up reproductive housekeeping. If dried or frozen, they look like lifeless chemicals and remain inactive for years only to resume activity again when favorable conditions are provided. 

About 500 of them have been identified by the electron microscope, which magnifies them 25,000 times or more.

They look much like pearls, beautifully cut gems, bricks, or rods when seen this way. They are extremely potent. Small numbers of them, given ideal conditions, can start a disease. They cause many diseases including polio, influenza, yellow fever, rabies, infectious hepatitis, smallpox, chickenpox, measles, mumps and the common cold. 

How to manage Infections, overdoses, side effects in modern medicine

Friendly bacteria keep under control harmful organisms that also are natives of the digestive tract. When friendly bacteria are killed off in large numbers, there is less competition for the harmful residents and they have a chance to multiply. The result may be super infection-a new and different infection that develops as a result of another's being treated. Again, the super infection is often mild and disappears once antibiotic treatment stops. 

But super infection sometimes can be severe.

What it comes down to is this: use of potent modern medications, not only antibiotics but many others, involves a calculated risk and alertness. Ideally, the physician uses them after careful consideration and upon arriving at the decision that the good to be gained outweighs any risks along the way-and uses them with caution, keeping alert to the earliest indications of any new trouble from the drugs which he may be able to overcome by change of dosage, switch of medication, addition of other medication, or when necessary discontinuance of treatment.

One of the major problems, though, has been the insistence of many patients upon willy-nilly prescription of medication. They may demand penicillin, for example, for a cold or any fever. They have the feeling that a visit to the doctor is not complete unless the doctor "gives" them something. Too often, this has put physicians on the spot; and to please patients, some have prescribed medication against their better judgment.

So far as your own health is concerned, you can do much to preserve it not just by seeking timely medical advice but by taking it-by avoiding insistence upon medications, by indicating to your physician that you are aware of the values and also limitations of medications, the need to use them wisely not indiscriminately, to use them when they are required and not otherwise.

DOSAGE PROBLEMS

A man who took double the prescribed dose of an anticoagulant-a drug that, in effect, acts to thin the blood to prevent clot formation-found himself in the hospital a few days later with severe nosebleedsand vomiting of blood.

 A woman with bronchial asthma was admitted to the hospital with heart palpitations after she had used, contrary to instructions, an isoprenaline (isoproterenol) spray repeatedly for several hours. Another patient, a 29-year-old man, who had decided to take 50 percent' more than his prescribed dose of a cortisone like drug, came- to the hospital with changed personality, considerable weight gain from fluid retention, and other effects. 

How taking body temperature helps to prevent certain diseases?

FEVER

Fever most commonly signals infection or inflammation somewhere in the body. The temperature is likely to be highest during a bacterial or severe viral infection. With a mild infection such as a cold, temperature elevation may be slight and fleeting. When fever is high, there is usually no hesitancy about calling the physician. But there may be other occasions when the physician should be consulted.

First

A few facts about taking temperature

Aspirin and aspirin-containing medications bring down elevated temperature and tend to keep it down for as long as four hours. So for accurate determinations, temperature should be taken before use of such medications or four or five hours afterward. Remember, too, that if temperature is taken immediately after smoking, it may be higher than normal; and conversely, if taken by mouth just after a cold drink, it may be lower than normal. Before taking temperature, rinse the thermometer in cool water and shake it until the mercury falls below the 95-degree mark. If you use an oralthermometer, hold it under the tongue, with mouth shut, for at least three minutes.

A rectal thermometer, after lubrication, should be inserted up to the 98.6-degree line while the patient lies on his side. It should remain in place for three to five minutes. For the average person, mouth temperature normally is 98.6 degrees, and rectal tends to be about one degree higher. When fever is mild-under 100 degrees orally or 101 rectally-and the only other symptom is nasal congestion, a slight cough, or a scratchy throat, there is no urgency about calling the physician. But take the temperature every three or four hours and note the severity of symptoms. If symptoms become worse or if the temperature moves up to 101 orally or 102 rectally, then notify your physician. Always when fever is present it is important to note the accompanying.

How often periodic medical checkups should be carried out?

How often periodic medical checkups should be carried out is best determined by the physician on the basis of what is most suitable for you as an individual rather than on the basis of a general rule. Age is one determinant. The elderly and the very young generally need more frequent examinations than those in between. But other factors must be considered-present state of health, past medical history, family medical history, occupational hazards if any, etc. Your physician will take these into account in deciding what is most appropriate for you -a checkup once a year, or twice a year, or perhaps once in two years.

BETWEEN CHECKUPS Manifestations of illness or impending illness take the form of signs or symptoms, or both. Signs are objective evidence: for example, a change in skin color or the swelling of a body part. Symptoms are subjective: for example, nausea or pain.

They can vary greatly, of course, from mild' and fleeting to severe and persistent. All deserve attention, though it is likely that if they are mild and transient the reason for them is inconsequential. Any persistentor recurring sign or symptom deserves action. Even if mild it should not be ignored. Passing it off as something not worth notice except by a hypochondriac is dangerous.

 You may become so habituated to its presence that you regard it as something "normal" for you-until the underlying problem reaches a stage where it is irreversible or leads to serious consequences. The following discussion is intended to help you interpret the significance of signs andsymptoms that may appear between checkups, as a guide to when to consult your physician without delay. 

Patient History and Physical Examination can be Physician’s tool to Prevent Diseases

Patient History and Physical Examination can be Physician’s tool to Prevent Diseases

One patient who experienced a slight change in urination-dribbling a little during the night- passed it off as a joke, kidding with his wife that somehow, though he was still a young and vigorous man, he had entered second childhood. He had actually developed an enlargement of the prostate gland. A year of delay made the operation he needed more difficult and led to a complication, kidney infection, caused by backing up of urine. In reporting symptoms to the doctor, don't grope for medical words; use simple English. Many diseases have strong psychological aspects, and symptoms may recede the moment you are in the doctor's office. Still, tell the doctor you have the symptoms even though it may seem silly to talk about them when they are not immediately present. You can be certain the doctor will understand the phenomenon.

THE PHYSICAL EXAMINATION 'Even as he shakes hands with you, an alert physician may pick up some clues. Are your hands warm and moist, with a fine tremor? These characteristics may suggest over activity of the thyroidgland. If the hands are cold and the skin is coarse and puffy, the thyroid could be under- active. Red fingertips may signal some abnormal flow of blood in the heart; flushing of the nail beds in time with the heartbeat may indicate another type of heart problem called aortic regurgitation. As he observes the body, the physician can learn a great deal. The color of lips and ears may indicate possible anemia.

The Promise and Nature of Preventive Medicine

 One leg is slightly shorter than the other-enough in some cases to account for a backache problem. He may note leg swellings traceable to a heart problem, and any enlarged glands, tumors, or abnormal pigmentation resulting from internal disease. In his examination, the physician will be looking to see if the body is symmetrical. Lack of symmetry is almost always a sign of some dis- ability or disease. If the left side of the neck looks different from the right, it may be because of a tumor which is pushing out on that side. If the thyroid is not symmetrical, it may be because of a benign tumor which has enlarged one lobe ofthe gland. In the retina at the back of the eyes, small blood vessels-arteries and veins-lie are almost naked, devoid of covering material.

And there, very quickly, with an instrument called the Ophthal-mo-scope, the physician by looking through the pupil of the eye can detect any blood vessel changes which may provide clues to diabetes or kidneydisease. Women need a breast examination for any tenderness, abnormal lump, or nipple discharge. During a vaginal examination, a smear of cells for the "Pap" test is usually taken; this is a test to detect early cancer in the area. Both men and women should have a rectal examination to detect any local disturbances. With an instrument, the Sigmoido-Scope, the physician can see and check the lower portion of the colon for any growths.

As a patient, you can help greatly by insisting that the physician do a thorough inspection, by reassuring him that you have no squeamishness. Some doctors feel that patients’ are resistant to rectal andgenital examination and omit these vitally important checks. 

How a Patient History Can be used in Preventive Health Care? follow 1000 posts

It is not essential that you have a detailed knowledge of modern examining and testing procedures. But some awareness of the basic, long-established methods and tests and the newest x-ray and laboratory tools, and what they can do, will be useful.

THE CASE HISTORY

The patient's history, always an invaluable guide in disease diagnosis, is equally valuable in prevention. We have mentioned earlier, in passing, some of the reasons. Occupational data-facts about the work you do and possibly the circumstances under which you do it-may reveal some hazards, physical or psychological, to which you are exposed. An account of family health-the illnesses of parents and grandparents, their longevity, the state of health of brothers and sisters-can provide clues to hereditary strengths and weaknesses.

Your own past illnesses are 'an. important part of the record. Some childhood episodes of illness, if severe, may have left a mark. Rheumatic fever, for example, may strike a child at 15 or earlier and may produce some heart damage. Yet, very often, the effects of the heart damage are not felt until age 35, 40, or even later. A record of the rheumatic fever incident may be of vital importance in accurate diagnosis of a heart condition. 

The case history-which includes what the patient reports about present problems-sometimes, provides the first indication of onset of a serious illness. For example, angina pectoris (chest pain) is associated with coronary heart disease. In coronary heart disease, the coronary arteries feeding the heart muscle become narrowed. There are sophisticated techniques now-including x-ray movies of the coronary arteries -to show up the narrowing. But in some early cases, angina may occur before there are sufficient changes to show up on the x-ray studies.

If in taking the history the physician determines that there have been angina episodes-perhaps after some sudden unusual exertion, perhaps upon leaving the house on a particularly cold morning-he can confirm the anginadiagnosis by giving the patient some nitroglycerin tablets to take when the next incident occurs; and if there is immediate relief of pain, the diagnosis is virtually 99.9 percent certain. During history taking, be accurate, don't make wild guesses, but do report things you may think are only minor, like a sense of just not feeling well. It's important to indicate any change because it may be an early warning of something potentially serious. 

How to prevent Kidney failure? 1000 posts preventive medicare

Preventive medicare avoid side effects. To days medicines cannot be trusted completely that they are free from side effects. To avoid side effects, we need to take due care to prevent any diesease before it reaches us. Take control of your body and follow the suggestions in these posts and you can aovid the complications. Follow our all 1000 posts following to safeguard your body and mind. 

Promising work is being done in detecting people with pre-diabetes-those who have no symptoms of diabetes but do have changes in body chemistry that may forecast eventual onset of overt diabetes. Early results of treating such patients with anti-diabetic agents are regarded by some investigators as promising, suggesting it may be possible to prevent the development of diabetes and such complications as visual disturbances, circulatory disturbances, and increased risk of coronary heart disease.

As we have noted earlier, kidney machines can be lifesavers for patients with kidney failure-but it would be far 'better to prevent the failure. And there is growing hope now that in many cases failure maybe prevented by attention to asymptomatic bacteria. Asymptomatic bacteriuria simply means the presence of sizable numbers' of bacteria in the urine without causing symptoms. The condition may occur at any age and in either sex but is especially frequent in females, affecting 1.2 percent of schoolgirls and 6 percent of pregnantwomen. There is evidence that if left untreated bacteriuria may eventually cause the kidney disease pyelonephritis, which in turn may result in kidney failure.

Bacteriuria can be treated effectively once detected and newer tests now make its detection simpler and more practical. Today, as the next post will show, many testing procedures are available to make it possible for the physician increasingly to anticipate and prevent diseases rather than wait for it to appear. 

DISEASE SCENARIOS in body care, and how to cure or prevent it? 1000 posts following

Bacterial diseases and preventive medical care

In Preventive medical care new discoveries and inventions make great changes in the human life.
Another important development has been the discovery that death is really a slow intruder, that diseases do not suddenly spring up full-blown but often have long scenarios. In the Korean War, autopsies of young American soldiers revealed that in 54 percent of these youths, many of whom had only very recently attained manhood, coronary heart disease was already starting. We see- of the disease germinate in the early years and the ultimate heart attack is the end result of a long process in time, then here is a problem that can be combatted, for there is time to combat it. And there is evidence of what factors are involved, there are mere to fight; to retard, and perhaps even to prevent it from getting started Some of the most impressive preventive work recently has been the result of advances in the understanding of body chemistry-and of chemical abnormalities that may be inborn. It has now become possible to detect early in life, even almost immediately after birth, such inborn errors as phenylketonuria and galactosemia.

Detection of diseases

They involve inability to properly handle certain specific food elements, and simply by avoiding such elements it has become possible to prevent development of mental retardation, growth failure, and other serious problems. Understanding of the chemistry of disease is expanding rapidly, and there is growing confidence that the principles of early detection and treatment of diseases due to inborn chemical errors can be extended to many common chronic diseases. That 'can make it possible for the doctor in his practice to have to deal less-with severe complications triggered while a disease smoulders under the surface before calling attention to itself with obvious symptoms, and he can be concerned instead with The early detection of the still symptom-free but predisposed patient and correction of the basic problem before complications have a chance to Develop..

Already, for example, promising work is being done in detecting people with prediabetes-those who have no symptoms of diabetes but do have changes in body chemistry that may forecast eventual onset of overt diabetes. Early results of treating such patients with antidiabetic agents are regarded by some investigators as promising, suggesting it may be possible to prevent the development of diabetes and such complications as visual disturbances, circulatory disturbances, and increased risk of coronary heart disease. As we have noted earlier, kidney machines can be lifesavers for pa- tients with kidney failure-but it would be far 'better to prevent the failure. And there is growing hope now that in many cases failure may be prevented by attention to asymptomatic bacteria.

Bacteria detection

Asymptomatic bacteria simply means the presence of sizable numbers' of bacteria in the urine without causing symptoms. The condition may occur at any age and in either sex but is especially frequent in females, affecting 1.2 percent of schoolgirls and 6 percent of pregnant women. There is ovi- dence that if left untreated bacteria may eventually cause the kidney disease pyelonephritis, which in turn may result in kidney failure. Bacteria can be treated effectively once detected, and newer tests now make its detection simpler and more practical. Today, as the next chapter will show, many testing procedures are available to make it possible for the physician increasingly to anticipate and prevent disca rather than wait for it to appear.