Przydatność przeciwciał króliczych uzyskiwanych dwiema metodami do wykrywania Clavibacter michiganensis subsp. sepedonicus testem DAS-ELISA

Abstract

Clavibacter michiganensis subsp. sepedonicus (Cms) bacterium is responsible for ring rot of potato, one of the most dangerous disease that affects potato plants and tubers. The best method to limit the disease propagation is quick and sensitive diagnostic of Cms bacteria. The deciding factor for the effectiveness of the immunologic tests is the quality of antibodies that detect the pathogen. In order to examine the influence of isolation of the antibodies aimed at entire bacterium cells (Cms) on their quality, two different methods of ion-exchange chromatography allowing isolation of IgG from rabbit blood serum were assessed. Separations were performed in columns filled with DEAE cellulose (diethylaminoethyl cellulose) and thiophilic Sepharose beds respectively. The stage that preceded chromatographic separations in both methods comprised an initial purification by precipitation of proteins from the serum in presence of salt solution. Using both matrices a preparative isolation of antibodies and removal of other impurities were achieved. The applied methods were compared in terms of quality of the antibodies obtained as well as time and difficulty of their accomplishment. Sensitivity of the antibodies to detect Cms bacteria was examined by application of DAS-ELISA assay (doubleantibody sandwich enzyme linked immunosorbent assay).