Abstract: A system and method for rapid detection of viable microorganisms (e.g., pathogens) in liquid media suspensions utilizes at least two electrodes in electrical communication with a suspension (e.g., liquid media possible containing microorganisms). Electrical response to an electrical pulse in a short initial time window (e.g., no longer than a time required to attain 95% (or another threshold percentage) of a study state electrical response value after a change in state of the pulse) permits bulk electrical response of the suspension between the electrodes to be determined before electrical response signals are dominated by double layer formation at surfaces of the electrodes. Pulse application and detection of electrical response to a change in state of a pulse may be repeated over time, with changes in such response being useful to detect microorganism proliferation in a bulk suspension.