Arezoo Hakimi - Department of chemical engineering ,quchan branch, islamic Azad University, quchan, Iran
Afshin Farah Bakhsh - Department of chemical engineering ,quchan branch, islamic Azad University, quchan, Iran
Targol Najarane Tousi - Department of chemical engineering ,quchan branch, islamic Azad University, quchan, Iran
Samaneh nirumand - Department of chemical engineering ,quchan branch, islamic Azad University, quchan, Iran

Rapid and simultaneous detection of multiple pathogenic bacteria in foods is of great importance to ensure food safety. The aim of this study is to develop a fluoroimmuno assay method using multicolor quantum dots (QDs) as fluorescent probes for simultaneous, sensitive, and rapid detection of three species of major pathogenic bacteria. The fluorescence intensities of the final complexes (measured at 504 nm, 557 nm and 604 nm respectively) have increased regularly with the increasing cell numbers of target bacteria.

Quantum dots, detection, food- born