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Application of an aptamer and a reagent based on gold nanoparticles for detection of Escherichia coli

Pięta P. P., Szczerba A., Dobroczyńska J. I., Grabas K.

Environment Protection Engineering

2013

Vol. 39, nr 4

125--133

Plates functionalized with an Escherichia coll binding aptamer and a reagent based on gold nanoparticles were used for the detection of bacterial cells. Bacteria suspended in samples were caught by specific aptamers immobilized on a plastic plate whereas the gold nanoparticle reagent is an indicator reagent for visualization of the test result. Changes in colour of the gold nanoparticle reagent caused by gold nanoparticle agglomeration were observed with the naked eye. The test was designed for the detection of Escherichia coli in water suspensions.