Abstract
A lateral flow immunoassay for the rapid detection of Clavibacter michiganensis subsp. sepedonicus bacteria causing potato ring rot was developed. Multimembrane composites (test strips) containing poly� clonal antibodies against the bacteria and gold nanoparticleantibody conjugates were used for the analysis. The test strips are suitable for the analysis of potato tuber and leaf extracts within 10 min; the detection limit of bacteria is 4 × 10 5 cells/mL. No crossreactivity with strains of Clavibacter michiganensis subsp. michigan� ensis, Pectobacterium carotovorum subsp. carotovorum and saprophytes of healthy potato plants was detected. The results of analysis of 26 potato samples by the developed tests were compared with those obtained by the PCR method and using the commercial enzyme immunoassay kits. The results of lateral flow immunoassay were confirmed in 96.2% of cases, which supports the high correlation with other analytical approaches. The developed immunoassay may be considered as a promising means of phytosanitary control.
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