Thanks to advances in modern medicine many diseases of the past, such as smallpox and plague, are gradually disappearing, but skin parasites in humans did not want to give up their positions even under the onslaught of modern conveniences provided by civilization.
In science called parasites are any organisms that get their power at the expense of members of other species, and thus inhibit its viability. People, like many other living beings that inhabit the earth, did not escape the fate of being "forced provider" representatives of this class.
Unwanted guests can hit any organs and systems, but most often in Europe people face by representatives of the worms, which affect mainly the digestive system, and skin parasites. The latter, although called skin, really can not live only on the surface of the human body, but also to penetrate into the skin. They usually carry lice, which cause such diseases as pediculosis, and different type of ticks. The most common is the kind of mites that cause scabies.
Lice — small insects that feed on human blood. They have several varieties:
First, as the name implies, live on the scalp. The skin here is relatively thin, so the insects can easily bite and suck blood. Females lay at one time more than hundreds of eggs — nits, which is covered with a protective sheath and firmly attached to the hair. 7-15 days, depending on how favorable the temperature, the eggs hatch, the larvae are able to suck blood after a couple of hours.
Cootie lives and reproduces in the folds of underwear and clothing, passing to the skin only for a short time for the exercise of power. Parasites strike the hair of the pubic part, the genitals, the armpits and sometimes eyebrows. They are well camouflaged, so they can be found far not at once.
Lice themselves are dangerous to humans only if their number reaches several thousand, but they can be carriers of serious infectious diseases like typhoid, or cause allergic reactions, purulent rashes, boils.
Itch mites — more unpleasant representative parasites. This is a microscopic arthropod settles under the skin in its deep layers and feeds on human epithelium. The mite lays beneath the skin moves, causing intolerable itching.
Lice, and scabies mites are transmitted from an infected person to a healthy one. This happens both in direct close contact, and through various objects: combs, towels, clothing, etc., it is often possible to hear opinion that the lice and scabies — a disease of the unfortunate members of society. This is a completely erroneous statement. You can become infected and in public transport, in the pool, the stations, camps.
Of course, the main reason is the failure to observe sanitary regulations, but sometimes there are situations when a person simply has no opportunities for regular shampooing, washing, changing the bedding. That is why skin parasites often affect seasonal workers and construction workers who live in poorly adapted premises, refugees, prisoners, the lonely sick people who find it difficult to care for themselves.
Among the signs that indicate the presence of parasites, the main ones are severe itching, bites, scratching, pustular sores. These symptoms require a thorough inspection. On examination, the patient lice on the skin found live insects, and on the hair — nits, which resemble a tiny drop of glue. Scabies affects mainly the folds between the fingers, the elbow, the breast, the stomach. On skin are well visible itch moves, bubbles-papules, place the scratching covered with crusts, and the itching can be so severe that the person can't sleep.
If you suspect scabies, you should immediately consult a dermatologist and undergo full course of treatment. Lice also requires a responsible attitude. In pharmacies you can find enough modern tools that will help to destroy lice, but without a thorough mechanical processing (combing the dead lice and nits) there is a risk of a return of the problem. In case, if a person discovered lice or parasites under the skin, you need to conduct thorough sanitation of the premises and things boil underwear and bed linen, well-ironed it with a hot iron on both sides.
The best way of prevention is personal hygiene, and avoiding contact with carriers of disease, not to use other people's pins and other personal belongings.