A blood test for parasitic infections: what is there to know?

Laboratory testing of blood is the most reliable of all methods for the diagnosis of various diseases, including infection by parasites. These organisms, which marks the parasite lifestyle in the human body, poison his products, his life, and also affect the immune system, in an attempt to eliminate the threat to their existence convenient.

Currently there are quite effective of laboratory studies of blood to detect parasitic infections.

The analysis of the blood

In such cases it is necessary to do a blood test to identify parasites

More than 70% of patients are not aware of the presence of parasites, and therefore has not considered it appropriate to carry out laboratory diagnosis on their presence in the body. Everything changes when a person begins to feel uncomfortable with the dark nature. By visiting the physician and having tried all the methods of diagnosis, which do not clarify the framework, at the end, are assigned to the laboratory blood tests to detect parasitic infections.

And in the meantime, there are enough characteristic symptoms, eloquently speak of the presence in the human body of parasites:

  • the characteristic symptoms on the part of the gastrointestinal tract: heartburn, nausea, constipation and diarrhea, flatulence, vomiting;
  • anemia, which is unresponsive to treatment;
  • new violation of the chair: diarrhea change constipation;
  • aching, pain in the joints;
  • allergic reactions of unknown etiology;
  • skin rashes, such as acne, pimples, comedones;
  • frequent colds due to a weakened immune system;
  • worsening of chronic diseases due to weak immune system;
  • lack of appetite or, vice versa, the desire often, and there are many;
  • the feeling of tiredness, weakness and drowsiness.

However, to diagnose parasitic infections only to the above-mentioned symptoms is very difficult, because it is characterized by and other related diseases. In particular, the symptoms from the gastro – intestinal tract may confuse both the doctor and the patient. Therefore, we need the elisa blood tests to detect the parasites, which is one of the most reliable laboratory methods. In addition, there are other blood tests that can be rented for the diagnosis of invasion.

Risk group: those who must take the exams on the parasites

There is a certain risk group, which includes people should donate blood parasites, and tested for their presence in the body of not less than 1 time per year. These include the following categories of persons:

  • the person professionally working with animals (dogs, vets, trainers);
  • the family in which they live pets;
  • health professionals, who constantly work with an infected person;
  • the educators of kindergartens and teachers in schools, because they work with children, must be in good health, but can also become a source of infection;
  • employees of catering (bars and restaurants), as they are in contact with food.
The laboratory

Methods of research of blood to detect the parasites

Until recently, the common analysis to identify the parasites is a stool sample. He showed the presence of eggs of worms in the stool. But this study has not always had a positive result, because the eggs of helminths may not be noticed or missed. For this reason, the analysis of feces is necessary to take 8-10 times. In our day, to carry out a series of laboratory tests for the presence of parasites in any of the immunological laboratory.

For a correct diagnosis of an infection by parasites in our time use the following tests, based on different principles:

  • gemo-test, scan the "live" drops of blood;
  • the PCR analysis (polymerase chain reaction);
  • ELISA analysis (immunoassay research of the blood);
  • serum of the blood, based on the research of serum of blood.

Are only the main methods of research, but not all. They, unlike the older techniques of diagnosis, may indicate the presence in the body also immature species of worms that do not lay eggs.

The modern methods of research appeared not so long ago, and their essence is based on the analysis of the DNA of parasites or immunoassay analysis of substances that produce the parasites.

Sometimes it is not possible to determine the presence of parasites in the body is only a method. Then use a series of methods to identify the different forms of pest infestations. In addition, each search method, the blood has its advantages and disadvantages.

Gemo-scan of the blood (gemo-test)

During the course gemo-test is taken and a drop of blood from your finger and investigates with the help of dark-dipole microscope that magnifies the image up to 1600 times. The results are immediately displayed on the monitor of the computer. This method allows to diagnose in an effective way, not only the presence of adult individuals of the parasites but also their eggs and larvae. For example, it is possible to note how the larvae of the parasite cling to the erythrocytes, and when you die, you meet again. This is very dangerous parasites that are called -intracellular. Also groan-scan allows you to detect fungal infections and to see abnormalities of the functioning of the cells in the early stages of the disease.

Usually, gemo-test are combined with other methods of diagnosis, because it does not recognize the number of parasites in the body.

Haemo scan a blood

The method is PCR, or polymerase chain reaction

This method uses the principles of molecular biology. It is based on the application of enzymes that repeatedly copy fragments of DNA, RNA parasites are located in the sought-after blood or plasma. Polymerase chain reaction pass in a special device – amplifier, which is capable of low and high temperatures influence the biomaterial (blood or plasma). The fluctuations of temperature indicators is essential to the process of copying DNA and RNA from parasites and affects the accuracy of the final result. This method is able to reveal the intracellular and intra-tissue parasites, especially the most simple. Less PCR method is the inability to inform on the stage of the disease and the number of parasites.

Immunoassay research of the blood (ELISA diagnostics)

ELISA diagnostics is a laboratory test, the essence of which is based on the immunological method of determination of specific antibodies to certain antigens. Between antibodies of particular importance are the immunoglobulins, which exist in the form of immune complexes and are indicators of the development of different diseases, and also their current activities.

For each agent the stranger in our body produces specific antibodies. They are formed through the "tandem" association for the antigen and the agent, foreigner, form the complex of "antigen-antibody".

To identify the parasites of this method produces the drawing of blood from a vein, exposing the research on the definition of the specific antibodies. ELISA diagnostic technique that allows to detect with precision the presence of not only the parasite, but in which phase of development they are, and to determine their quantity in the body. Immunoassay the search also allows you to diagnose the infection in the initial phase of development, when she did not feel. The disadvantage of this method is the possibility of false positive or false negative results.

Capsule

Serological analysis of the blood

The research of serum of blood of the laboratory method of study of the components of the blood, which is held as to identify pests, and to detect the infections, bacteria, germs and viruses in the human body.

The essence of the method consists in the research of blood serum with the aim to detect the presence of particular proteins that produce the parasites, viruses and microbes. This method is also applicable for the determination of the blood group of a person. The removal of blood is carried out in the morning, on an empty stomach.

This study is very effective in detecting all types of worms and parasites, including the most simple. The disadvantage of this method is the search for the blood is the inability to determine the stage of development of parasites, and also the number of them in the body.

Unfortunately, however, none of the methods above is not able to specify the localization of the parasites in the human body. But, however, the position of parasites, it is possible, on the basis of the types of pest infestations and the symptoms observed.

Other methods of diagnosis of parasitic diseases

There are other methods of diagnosis of parasites, which are applied in private to the specific case.

  1. Histological coprogram. This diagnostic method includes the physical, chemical and microscopic research of cala. With this method it is possible to identify parasites infection helminths, in addition, once you reveal the type of parasite, and also find their eggs and larvae.
  2. In common, the analysis of the blood is not always effective for the detection of parasites, but in some cases in the blood, it is possible to see the consequences of the life of parasites, and also find out if the person is anemia.

In any case, it is chosen not only a method of study and a customized program, which includes a complex of measures for the diagnostic of parasites in the body. Sometimes you can do a single search and in other situations of individual need complete search. What tests do determine only the attending physician. However, in each case, the analysis of blood to detect installed infestations are the most effective methods of diagnosis.

How to prepare for the research of the blood to detect the parasites

For the analysis of the blood revealed reliable in-direct, to him must be carefully prepared in advance. In the first place, you need to stop taking medicines that may affect the formula of the blood in one way or another. These conditions are necessary when immunoassay diagnostic systems of the blood, serological analysis, and gemo-scan. A week before the day of delivery for the analysis must stop taking any pharmacological agents.

In addition, before the examination of the blood for the presence of parasites, you must switch to a proper diet, rich in fresh fruit and vegetables, eliminate alcoholic beverages, fatty foods and high calorie meals. Such a diet should follow for three days prior to the workshop. Immediately before analysis, it is recommended not to eat at all. If blood tests to identify the parasites on an empty stomach, giardia, ossiuri, and roundworms found in the blood with highest risk.

How to decipher the results of the analysis

The diagnosis of parasites

Usually, the interpretation of the analysis deals with the specialist who performed the laboratory test, because sometimes as a result of the analysis can be those or other errors. However, each person will be useful to know what the symbols mean in its analysis laboratory. Then:

  • the sign "+" of IgG and IgA antibodies suggests that the infection disappears, and the blood is found only post-infectious immune system;
  • if the "+" sign is still the IgM, then, should be the aggravation of the chronic infection;
  • if the sign "+" is still valid and IgM, IgG and IgA antibodies , it means that the infection is in the acute phase of development;
  • Combination of characters, IgM (-), IgG (+/-), IgA (+/-) speaks of chronic infection in the phase of attenuation;
  • IgM (-) is about a complete remission.

The most exact transcription of the results of the analysis makes it specialist. With a holistic approach, spend a series of research lab, which can determine with precision all the stages of the disease, from the acute form up to complete remission. Also on the basis of a diagnostic is not worth self-medication and taking drugs, because after a analysis, you'll need more studies that reveal a picture of the disease in full.

02.06.2019