WAY OF DIFFERENTIATION OF INFECTIOUS AND VACCINE-CHALLENGED ANTIBODY RESPONSE AT HUMAN TULAREMIA Russian patent published in 2009 - IPC G01N33/569 

FIELD: medicine.

SUBSTANCE: invention concerns medicine, namely to laboratory diagnostics of human tularemia and concerns differentiation of infectious and postvaccinal antibody response at human tularemia. The essence of the invention consists that as an antigenic preparation in addition to LPS Fransicella tularensis in a dot blotting in parallel LPS Fransicella novicida is used. For this purpose LPS preparations are preliminary allocated from corresponding strains which are dissolved in the distilled water and applied on a nitrocellulose membrane in volume 1 mcl from the 1-5 mg/ml solution, with the subsequent processing by a buffering normal saline solution at pH 7.0-7.1 with 1% bull seralbumin and 0.5% twin 20 within one hour. After that the filters are washed out and incubated in the investigated serum dissolved not less than 1:100, within an hour at temperature of 37°C, then the samples are washed three times, also presence of complexes an antigen-antibody is revealed by a withstanding within 1 hour at a room temperature in a working solution of protein A, labelled with horse-radish peroxidase, with the subsequent washing up and placing in a painting solution, thus the account and an estimation of results are spent on presence of two brown maculae on a place of drawing of LPS F.tularensis and LPS F.novicida preparations which presence testifies to infectious process at the investigated patient, and at vaccinal process one maculae on a drawing place only LPS F.tularensis is observed.

EFFECT: advantage of the invention consists in simultaneous revealing infectious and postvaccinal antibody responses.

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