An apparatus for the treatment of pathogens within a body comprising at least a pair of conductive electrodes adapted to conductively engage physically separated points on the body and a signal generation device comprising signal-generating means for generating an oscillatory signal of a selected frequency which can range between a first frequency level and a second frequency level of greater than 1.0 MHz means for causing said signal-generating means to step in frequency from said first frequency level to said second frequency level at predetermined frequency steps for predetermined intervals and power transfer means, and preferably a power amplifier, responsive to said signal-generating means for supplying a voltage to said electrodes which voltage oscillates at said selected frequency. The output signal from the apparatus has a frequency range from 0.01 MHz to 660 MHz, and a preferred frequency range of 1.0 MHz and 5.4 MHz, has been found to provide greater flexibility in the treatment of pathogens.