Laboratory analysis of blood is the most reliable of all the methods of diagnosis of various diseases, including infection by parasites. These organisms, leading parasitic life style in the human body, the ambi it the products of its life, and also affect your immune system in an effort to eliminate a threat to your own well being and comfort of existence.
Currently, there are quite effective laboratory testing of blood for the detection of parasitic infections.
In some cases it is necessary to do a blood test for the detection of parasites
More than 70% of the patients did not suspect about the presence of parasites in itself, and, therefore, does not consider it necessary to perform a laboratory diagnostic of its presence in the body. Everything changes when the person starts to feel the malaise incomprehensible nature. Visiting your physician and have tried all the methods of diagnosis, not polishing the paint, after all of accounts, are given to the laboratory testing of blood for the detection of parasitic infections.
And, there is, however, quite characteristic symptoms, eloquently speak about the presence in a human body of parasites:
- the characteristic symptoms from the side of gastrointestinal tract: heartburn, nausea, constipation and diarrhea, flatulence, vomiting;
- the anemia that is not treatable;
- regular violation of the chair: the diarrhea is replaced the prison of the womb;
- pain pain in the joints;
- allergic reactions unexplained;
- eruptions on the skin as blackheads, acne, comedones;
- frequent colds disease, because of the weakening of the immunity;
- worsening of chronic diseases because of low immunity;
- lack of appetite or vice-versa, an uncontrollable desire, many times and many;
- the feeling of fatigue, weakness and drowsiness.
However, diagnosing the parasitic infection only the symptoms that are described above, it is very difficult because they are characteristic of other diseases. Especially gastrointestinal symptoms, can confuse as the doctor and the patient. For that, you need the enzyme-linked immunosorbent assays of blood for the detection of parasites, which is one of the most reliable methods of laboratory research. In addition, there are other blood tests that you can pass to the diagnosis of invasions.
Risk group: those who have to give analyses about the parasites
There is a certain risk group, which includes people, which, necessarily, must donate blood for parasites and undergo a verification of its presence in the body, at least, 1 time per year. These include the following categories of persons:
- individuals who work professionally with animals (specialists, dogs, veterinary surgeons, make the practitioners);
- a family, living with pets;
- the health professionals who work continuously with the infected people;
- the teachers of kindergartens and teachers in schools, because they work with children, must be healthy, but it can become a source of infection;
- employees of hospitality (restaurants and cafes), because they have contact with food.
Methods of research of blood for the detection of parasites
Until recently, the most common of analysis for the detection of parasites was the stool analysis. He showed the presence of eggs of helminthes in the stool. But this study is not always had a positive result, since the eggs of helminths may not see or ignore. For this reason, the examination of feces it was necessary to spend 8 to 10 times. In our days, to conduct a series of laboratory studies for the presence of parasites in any of the immunological laboratory.
For the correct diagnosis of an infection in our time, use the following tests, based on different principles:
- hemo-test, scan the "live" drop of blood;
- the PCR analysis (polymerase chain reaction);
- analysis of ELISA (immunoassay blood test);
- serological analysis of blood, based on the research of serum of blood.
It is only the main methods of research, but it is not everything. They, unlike the archaic methods of diagnosis, can show the presence in the body of the same immature individuals worms that do not lay eggs.
The modern methods of research have not appeared for a long time, and its essence is based on the analysis of the DNA of the parasite or immunoassay analysis of substances that produce the parasites.
Sometimes it is not possible to identify the presence of parasites in the body of only one method. Therefore, they use simultaneously several methods to identify the different forms of parasitic infestation. In addition, each method of research of blood has its advantages and disadvantages.
Hemo-scan of the blood (hemo-test)
During the course of hemo-test is taken and a drop of blood from your finger tip and investigated with the help of the dark dipole of the microscope, which increases the image 1600 times. The results instantly appear on the computer monitor. This method allows you to effectively diagnose not only the presence of adult parasites and their eggs and larvae. For example, you may notice, as the larvae of parasites that cling against red blood cells, and when he dies, are new. It is very dangerous kind of parasites, which are called -intracellular. Also hemo-scan allows the detection of fungal infection and to see the variances in the cells in stages very early disease.
Generally, hemo-test combined with other diagnostic methods, because it does not recognize the number of parasites in the body.
The method of PCR or the polymerase chain reaction
This method uses principles of molecular biology. It is based on the application of special enzymes that repeatedly copy excerpts of RNA and DNA parasites that are in the searched for blood or plasma. Polymerase a chain reaction in spend on a dedicated device – amplifier, which is capable of low and high temperatures, to act on the matter biological (blood or plasma). The temperature fluctuations of performance indicators is a necessary condition for the process of copying the DNA and RNA of parasites and affect the accuracy of the final result. This method is able to reveal intracellular and within-tissue parasites, especially the most simple. Disadvantage of the method of PCR is the inability to inform about the stage of the disease and the number of parasites.
Immunoassay blood test (diagnostic TEST)
ELISA, the diagnosis is laboratory research, whose essence is based on the immunological method of determination of specific antibodies to certain antigens. Among the vital antibodies immunoglobulin, that exist in the form of immune complexes and are indicators of the development of various diseases, as well as the activity of their current.
In each alien agent in our organism produces specific antibodies. They are formed by the "tandem binding" of the antigen and the foreign agent comprising the complex of "antigen-antibody".
For the detection of parasites according to the method of producing the blood collection of vienna, which expose the search on the definition of specific antibodies. ELISA diagnostic method that allows to identify with precision the presence not only of the species of the parasite, but and at what stage of development they are in, but also to determine its amount in the body. Immunoassay, the study also allows to diagnose the infection in early stage of development, when it does not makes you feel. The disadvantage of this method is the possibility of false negative or false positive results.
Serologic blood tests
The research of serum of blood in the laboratory, the test method of components of the blood, which is done for detection of parasites and for the detection of infections, microbes and virus in the human body.
The essence of the method consists in the study of the serum of blood for the detection of specific proteins, which produce parasites, viruses, and microbes. This method is also applicable to determine the blood group of a person. The blood collection is carried out in the morning, on an empty stomach.
This study is very efficient in the detection of all types of worms and parasites, including the most simple. The disadvantage of this method of research of blood, it is impossible to determine the stage of development of the parasite, as well as its amount in the body.
However, unfortunately, none of the methods above is not able to specify the location of parasites in the human body. But, however, to find the location of the parasites can be based on the type of parasitic infestation and the symptoms observed.
Other diagnostic methods of parasitic diseases
There are other methods of diagnosis of parasites, applied in particular to the specific case.
- Histological coprogram. This method of diagnosis includes the physical, chemical and microscopic study of the stool. Using this method, you can reveal parasites the risk of contracting worms, in addition to immediately identify the type of parasite, as well as find their eggs and larvae.
- The general examination of blood nor always is an effective way of parasite detection, but in some cases, in the blood, you can see the consequences of life of a parasite, but also to find the person has anemia.
In each case, the chosen is not simply a search method and a program, which includes a package of measures for the diagnosis of parasites in the body. Sometimes, you can do a single study, and in other situations, you will need to individual a research. Which tests to perform only identifies your doctor. However, in any case, blood tests to detect the parasitic infestation are the most effective diagnostic techniques.
How to prepare for the search of blood for the detection of parasites
For the analysis of the blood showed a reliable result, you should be well prepared in advance. In the first place, should stop taking medicines that can affect the formula of blood in one degree or another. These conditions are necessary when immunoassay diagnosis of blood, serological analysis, and hemo-scan. For the week prior to the day of to place the analysis must stop taking any type of drugs pharmacological.
Even before the research of blood in the presence of parasites, you should change to a proper diet, rich in fresh vegetables and fruit, for eliminating alcohol, fat and caloric dishes. This diet should be followed for three days, until the research lab. Immediately before the analysis, it is recommended not to eat anything. If the blood test for the detection of parasites in fasting, Giardia, pinworms and roundworm are detected in the blood, with greater reliability.
How to decipher the results of the examinations of
As a general rule, the transcript of the examination deals with the expert, who has conducted laboratory research, because sometimes the result of an analysis can be the types of margin of error. However, each person will be helpful to know what mean the symbols in your lab report. Then:
- the "+" sign of the IgG and IgA says that the infection disappears, and the blood is the only post-infectious immunity;
- if the "+" sign it's worth still IgM, it means, it will aggravation of chronic infection;
- if the "+" sign that it's worth yet, and IgM, IgG and IgA antibodies , it means that the infection is in the acute phase of development;
- The combination of characters of IgM ( - ) IgG (+/-), IgA (+/-) says about the chronic infection phase of damping;
- IgM (-) talks about a complete remission.
The most accurate decryption of the results of the analysis is an expert. In an integrated approach, are conducting a series of research lab, which can determine with precision all the stages of the disease, since acute until complete remission. Also, based on the diagnosis of that are not worth to self-medicate and take drugs, because that, after an analysis have more research, portrays the image of a disease fully.