It is difficult for an ordinary person to imagine how many parasites can endanger his health. These “immigrants” can live in the human body for years, literally sucking life out of it and poisoning it with their poison.
Types of parasites
From a medical point of view, parasites include unicellular and protozoa. Depending on their habitat, they are divided into exoparasites (lice, bed bugs and others) and endoparasites.
Endoparasites have their subspecies:
- Larvae laid by insects.
- Protozoa (amoeba, lamblia).
- Helminths (worms or worms).
Pathways of Infection
Each parasite has its own path of penetration into the human body. The most common way of eating is with the help of water or food. Many insects can carry the larvae of parasites, polluting the environment. By consuming raw water, unwashed and undercooked food, a person becomes infected with parasites.
Some species are transmitted directly by person-to-person contact - this path is called a contact household. The infection does not require direct contact with the distributor, it is enough to use household items. Thus, enterobiasis and some other parasitic forms are transmitted.
An equally popular vector vector path. In this case, the parasites are transmitted by blood-sucking insects. So they can be obtained after being bitten by a mosquito or some other insect.
The last way parasites enter is the percutaneous route, another name is active. Infection occurs by the penetration of larvae through the mucosa and skin. This occurs due to contact with contaminated soil or water in the water body.
Symptoms
Parasites in the human body can live long and not manifest. The symptoms will, of course, be there, but they are masked in other diseases. As a result, a person may not be aware that they are infected for a long time.
Symptoms most commonly occur depending on the position of the larvae, but the body can signal infection and other manifestations. The most common are:
- Flatulence,and constant, indicates the presence of worms in the small intestine;
- Diarrhea.Caused by the absorption of sodium chloride by parasites;
- Prison.Groups of worms can clog some organs;
- Joint and muscle pain.These pains are caused by the migration of larvae through the human body to which the immune system responds in this way;
- Allergy.The parasites themselves are an allergen for the body, and damage to the stomach walls contributes to digestion and the entry of food molecules into the blood;
- Occurrence of granulomas.This is a type of neoplasm that results from wrapping the cells of the body of destroyed parasite eggs;
- Dermatological manifestations;
- Anemia.Often people suffer from anemia precisely because of the activity of parasitic forms;
- Sharp weight fluctuation;
- Mental disorders.In the process of life, parasites release toxins that negatively affect the host's nervous system. Body poisoning can result in neurosis, depression, anxiety;
- Bruxism.This is brushing your teeth while you sleep. This is the response of the nervous system to the appearance of foreign bodies. But science does not prove this fact definitively;
- Sleep disorder.It usually occurs due to unpleasant sensations. An example here could be their pinworms laying eggs at night. Leaving the rectum, the pinworm secretes a toxin that causes severe itching; Dysbacteriosis;
- Oncological diseases;
- Chronic fatigue.Occurs due to lack of nutrients, which negatively affects the state of the body;
- Respiratory tract diseases.Numerous parasites can live in the respiratory tract and cause disease. Other parasites provoke a cold by moving through the respiratory system;
- Immune disorders. The absorption of most vitamins by parasites leads to a weakening of the body's protective functions and a greater likelihood of infection.
But there are also symptoms characteristic of the presence of parasites in a particular human organ. For example, papillomas, the appearance of bald spots on the head, cracked heels, etc. They may indicate the life of the parasite in the liver. In addition, the presence of certain types of parasitic forms can cause a certain type of disease in humans.
Disease detection
Unfortunately, some doctors deny their duties and do not send a person to special studies to identify parasites in the body. The most common test is giving feces for worm eggs. The fact is that the parasites can inhabit various organs.
There have been cases where worms have been found in the human brain and eyes. Is it likely that their eggs will go from the brain to the feces? Probably not. Even if there are worms in the intestines, the eggs of the parasite may not be found.
First of all, the doctor must perform a visual examination of the patient. From the outside, the presence of human parasites can be suspected. The easiest way to detect them is to take a blood test aimed at detecting specific antibodies to the worms.
Description of human parasites
There are dozens of species of parasites that inhabit the human body.
Worms or helminths are a type of worm.Their size depends on the species, for example, female roundworms reach 40 centimeters. Some species can exceed a length of 10 meters. The favorite habitat of worms are the intestines, but they are often found in other organs, even in the brain.
For example, the larvae of roundworms circulate in the body, collecting nutrients and returning to the intestines, where they grow and reproduce. They often live in the respiratory organs. The presence of ascaris in the human body is accompanied by dysfunction of internal organs, intoxication of the body, allergic manifestations, and even fever.
Among the tapeworms is the pig tapeworm that migrates blood to the brain. 
This parasite enters the body through poorly processed meat products. This worm lives up to 20 years.
Pinworms most commonly develop in children, but are quite common in adults. These worms are small in size and reach 1 centimeter in length. The spread of pinworm eggs occurs at the contact-household. The female emerges from the rectum and lays eggs in the outer folds of the anus. The toxin released by the female causes severe itching, which causes the eggs to fall on human hands and transfer them to all surrounding objects.
Another name for enterobiase is dirty hand disease. All people who come in contact with the carrier are likely to be infected. Therefore, when pinworms are found, treatment of the whole family is recommended.
Toxocarais a type of parasite that lives in dogs. They enter the human body and also develop well in it. Unlike these worms in the dog's body, human toxocara do not come out, but affect many organs and cause certain diseases. You can become infected with toxocara through the ground, because the larvae of these worms come out with dog feces. But parasite eggs can also spread from a dog's wet breath.
Alveococci and Echinococciinfect the body in many ways. Their danger lies in the fact that the larvae transform into cysts that can be found in various internal organs.
Giardia is the simplest.Like pinworms, Giardia is the most common infection in children.
They not only reduce the child's immunity, but also provoke a delay in the mental and physical development of children.
This list is far from complete. The main danger of parasites is that no one is immune from infection. Their secrecy leads to the fact that a person feeds on parasites for years without doubting it. Compliance with personal hygiene, constant wet cleaning of the housing and respect for the norms of heat treatment of meat products are not bad prevention of infection. It would be helpful to undergo a medical examination and undergo the necessary tests every six months to prevent the spread of the parasite.