 This study developed a new electrochemical detection technique for rapidly detecting bacterial pathogens such as Bacillus Sirius and Escherichia coli 0157H7. The technique combines cyclic voltammetry with immunomagnetic separation and uses a magnetic slash polyaniline core slash shell nanoparticle to extract target cells from the sample solution and magnetically position them on a screen printed carbon electrode, SPC. The presence of target cells significantly inhibits current flow between the electrically active core slash shell nanoparticles and the SPC allowing for quick detection of the pathogen. This technique has the potential to be adapted for a wide variety of target organisms and sample matrices and could become a fully portable system for routine monitoring or emergency detection of bacterial pathogens. This article was authored by Evangeline, C. Alice Ilja, and Emma B. Setterington.