Drug and nanoparticle mediated rapid naked eye water test for pathogens detection

•A novel drug based colloidal assay for rapid detection pathogen detection was developed.•Colistin, a commonly used drug molecule was used for detecting bacteria based upon Plasmon changes of Gold nanoparticles.•The assay show visible colorimetric response up to 10 Cells mL−1.•The assay was also tes...

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