A nanorobotic device that could safely provide quick and complete eradication of blood borne pathogens using relatively low doses of devices would be a welcome addition to the physician’s therapeutic armamentarium. Such a machine is the microbivore, an artificial mechanical phagocyte.The microbivore is an oblate spheroidal nanomedical device measuring 3.4 microns in diameter along its major axis and 2.0 microns in diameter along its minor axis, consisting of 610 billion precisely arranged structural atoms in a gross geometric volume of 12.1 micron. It is an ideal nanotechnology-based drug delivery system which is—self-powered, computer-controlled medical nanorobot system capable of digitally precise transport, timing, and targeted delivery of pharmaceutical agents to specific cellular and intracellular destinations within the human body. Microbivores will have many applications in nanomedicine such as initiation of apoptosis in cancer cells and direct control of cell signaling process.