A medical delivery system that enables the delivery of therapeutic agents to malignant tissue utilizing delivery agents and heating of the delivery agents thereby causing the release of the therapeutic agents within the tumor is disclosed. The therapeutic agents may be chemotherapy agents, radiation therapy agents, and other appropriate materials. The magnetic nanoparticles encapsulated by the therapeutic agents in a biocompatible coating may be delivered to tumor sites utilizing attenuated strains of bacteria that seek and reside at tumor sites. An alternating magnetic field device with a prescribed frequency range may be used to induce heating of the magnetic nanoparticles in the patient thereby melting the coating and releasing the therapeutic agents within the tumor.
