FIELD: medicine. SUBSTANCE: immunodiagnostic unit is prepared basing upon finely reduced activated coal. It is an aqueous suspension of activated coal particles at their size being below 10 mcm sorptionally connected at weight ratios ranged 1:10000 to 1:1000 with one of specific immunoreagents (antigens, immunoglobulins, staphylococcal proteins, etc.), stabilized with high- molecular polymers (albumins, polyethylene glycols, gelatin, polyvinylpyrrolidone, etc.). The method provides visualization of assay results due to marker's properties. EFFECT: higher sensitivity of immunoassay. 4 cl, 1 tbl, 3 ex
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