Enzyme-linked immunosorbent assay (ELISA) is a method for detecting antigens and antibodies in biological fluids. The method is characterized by high accuracy and sensitivity, and allows determining not only the qualitative, but also the quantitative composition of antigens and antibodies in the body. In medicine, enzyme immunoassay is used to detect diseases that are provoked by microorganisms of variious classes, from viruses to parasites, as well as to diagnose autoimmune diseases.

C-reactive protein (CRP) is a protein of the acute phase of the inflammatory process that is a more sensitive marker of the inflammatory process than the erythrocyte sedimentation rate (ESR). Its concentration instantly increases during the first hours of the development of the pathological process in the body, which is accompanied by cell decay and tissue necrosis.

Glycated hemoglobin (HbA1c) is an indicator that reflects the level of glucose in the blood over the past 1-3 months. The main indications for its use are as follows: control of the course of diabetes mellitus (once in 3 months), control of the effectiveness of diabetes treatment, an indicator of the risk of developing complications of diabetes mellitus. The study of HbA1c allows evaluating the level of glycemia in a diabetes mellitus patient 60-90 days prior to the study. The study makes it possible to monitor the course of the disease and control the adequacy of the treatment. The study of HbA1c should be carried out to assess the risk of complications in a patient with diabetes mellitus.

The main role in the diagnosis of helminthiases and parasitosis is played by laboratory tests. Taking into account the fact that the same person may have a combination of several helminthiases and parasitosis, it is recommended to perform several tests at once or a comprehensive analysis for common helminthiasis and parasitosis, which is more convenient for the doctor and the patient.

D-dimer is a protein fragment, resulting from the breakdown of fibrin during fibrinolysis. D-dimer is considered to be a fairly informative indicator of thrombus formation, since the mechanism of its production starts simultaneously with the process of thrombus formation. A D-dimer test allows evaluating the combination of 2 factors at once: coagulation and fibrinolysis. The marker makes it possible to timely detect their imbalance in case of diseases of the circulatory system (varicose veins, thrombophilia, pulmonary embolism).