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Blood tests for parasites

The parasites living in the human body cause unclear etiological anxiety.It can be skin rash, bloating, heartburn, nausea, weakness, anemia, joint pain.To explain the diagnosis, a special test should be done.

Parasites that can live in the human body

Hemoscania blood droplets for parasites

Classification of parasites in their appearance:

  1. Lamblia,
  2. Opistorchi,
  3. Echinococci,
  4. Toxocker,
  5. Trichinella,
  6. Soldierids.

For representatives of several professions (for catering company staff, children's institutions), analysis for worm eggs is required in the design of the sanitary book.Children pass the same analysis when entering kindergarten and nursery or in sports section.

  • Classical studies on worms that live in the gastrointestinal tract are stool analysis and mucous binding from the rectum.
  • But there are several options for blood tests that are more effective for parasites, as intended and by method.

Classical research on worms

Classical studies on worms that live in the gastrointestinal tract (gastrointestinal tract), for example, pinworms, ascarides, are stool analysis and mucous binding from the rectum.But the analysis of one -stool may not show positive results, so it is advisable to do three times.

  1. To analyze stools and scrape, histological cop program is used (viewing pieces of material under a microscope).Research efficiency is about 20%, due to the low probability that eggs or parasite larvae will fall into the material analyzed.
  2. Controversial studies for helminths, simple parasites and fungus in the body are electro methods.Their essence is to obtain results using measurement of bioelectric reactions of active points with electrodes.For this purpose, special devices are used.Many doctors see doubtful research data.
  3. The most informative parasite examination is a blood test.

Type of blood tests for parasites

There are several options for blood tests for parasites: as intended and by method.Each of these methods has its own advantages and disadvantages.Depending on the methodology used, the following types of blood tests exist:

  1. Elisa or blood immunophynticnicnicnicnicnicnicnicnti;
  2. PCR chain reaction or polymerase;
  3. Hemoscaning;
  4. Serological blood tests.

ELISA, Analysis for antibodies and immunoglobulina

This analysis is based on the body's immune response, the level of its protective reaction to parasitic invasion.When antibodies are formed in the form of the human body in response to the entry of pathogens or only foreign proteins in their blood, they are called immunoglobulin.

  • Using ELISA results, you can determine the presence of helminths in their body and their type.The accuracy of this study is much higher than the stool analysis.
  • This method is based on the calculation of antibodies in the body to one or other types of parasites, determining their relationships with foreign antigens (immune response) and body enzyme reactions.
  • Antibody - antigen shows the presence of infection.
  • Elisa's blood tests have accuracy, according to different experts, from 60% to 90% even at low levels of intrusion.
  • The advantage of the method, in addition to high levels of accuracy, is that the analysis of immuno function can be monitored by the dynamics of the disease over time.

Ifa's blood test for parasites

Analysis for antibodies looks like a set of characters that mark this antibody or they are called immunoglobulin.

  • In total, 5 of them were studied - IgG, IGA, IGM, IGE IGD.
  • In practical medicine, the first four immunoglobulin is important.

IgM is the main marker for the acute phase of the disease

IgM - Immunoglobulin, which appears in the acute phase of the disease, indicates the onset of infection.

  • Appeared in the blood on the fifth day,
  • It was detected by analysis after 6 weeks.
  • Then he started to disappear quickly.

IgE - markers, parasitic infection indicators

IgE - Immunoglobulin shows the presence of parasites or allergies in the human body.

  • is a marker -related process -related process,
  • It circulates slightly in the blood, based on mucous membranes, macrophages and basophils,
  • Participate in the immune response to the infection with the parasite.

Igg - a marker of disease and immunity

IgG - immunoglobulin, appears in the process of the disease.

  • IgG is also preserved after healing, for some infections for life, for example, measles, rubella and others.
  • The detection of immunoglobulin in the blood says that the body has met this infection earlier, with this specific pathogen.

Elistrical Parss analysis results

For different combinations of plus and minus in blood tests for parasites, the following conclusions can be drawn:

  1. lack of infection - all antibodies with minus;
  2. Acute stage-igg (+/-), IgA (+\-), IgM (+);
  3. Chronic-igg (+/-), IgA (-), IgM (-);
  4. presence of immunity-igg (+), IGA (-), IgM (-);
  5. Increased Chronic Disease - IgG (+), IGA (+), IgM (+)
  6. If the disease is detected and treated, then the value of all antibodies will be achieved only six months after treatment, sometimes after 1-2 years.

ELISA analysis reliability

The ELISA method provides a 90% reliability level for the diagnosis of infection with ascarides, pinworms (esiobiosis), toxocars and others that cause the formation of IgG immunoglobulin in large quantities.

  1. You can determine lambliosis with separate and general (OPD) antibody levels in the blood.
  2. The OPD value of more than 1 indicates that there is an infection or,
  3. With a value of less than 0.85 there is no lamblia.
  4. If the value is in the interval, it is advisable to repeat the analysis after 2 weeks.

This method is characterized by several weaknesses.This analysis allows you to determine the level of antibodies developed in the body to neutralize helminths, rather than the worm itself.

  • Therefore, it is possible to get positive and false negative results.
  • This also happens when the patient takes drugs,
  • Metabolic disorders and the presence of current chronic disease.

General blood tests, changes in parasitic infection

You can indirectly suspect the presence of intrusion by doing a general blood test.Because the presence of worms affects the internal organs, their essential activity products enter the bloodstream, altering its composition.The partial list of the effects of intrusion on blood parameters:

  • increased hemoglobin;
  • Non -Normative Indicators ESR;
  • Eosinophil's advantages of 20%;
  • Zhelezia anemia.

If there are no other reasons for such deviations, it is advisable to include special blood tests for parasites, ELISA, PCR in diagnostic programs.

Polymerase chain reaction, PCR analysis

The PCR method, or polymer chain reaction, is considered the basis for molecular diagnostics and is one of the most modern and accurate for diagnosis for the presence of parasites in the body.

  • It consists of detecting DNA and RNA traces, belonging to the parasite life.
  • The essence of polymerase reaction is the treatment of blood in such a way to copy and distribute DNA, RNA foreign organism to the concentration that allows them to determine.

Serological blood test

At the same time, analysis is used as a source of blood serum information.

  • Immunogenic parasitic antibodies are investigated.
  • This analysis allows you to identify a large number of parasites, but does not allow you to determine the level of intrusion.
  • Like the IFA method, serological analysis is indirect for diagnosis.
  • If the OPD value is high, it is advisable to pass the poop analysis.

Diagnosis with a blood scanning method

During parasites hemoscanication, a drop of blood "live" patients are studied by optical devices where, in addition to worms, you can determine their larvae and fungi.

How to take a blood test for parasites

Blood fence from the elbow veins

Blood donations for parasites are carried out in specialized labs.Blood for analysis is taken from the elbow veins in 3-5 ml and placed in a dry sterile test tube.Before passing the analysis, it is recommended:

  1. Do not eat for 8 hours;
  2. At dinner, leaving fat and milk dishes;
  3. Do not take alcohol and carbonated drinks;
  4. Avoid excessive physical work, physiotherapy, X -ray radiation;
  5. Refuse to take medicine.
  6. A lot of drinks are welcome.
  7. The state of blood contribution to PCR is less strict, as the level of fullness does not affect the presence of parasitic DNA.

The date of analysis

  • The results of the IFA and Serological tests are released within a week.
  • For PCR and Hemoscaning blood tests, it's been a few hours.
  • With the results of the analysis, you should definitely consult your doctor.