A medical device for diagnosing and eliminating or compromising organic micro-organisms, including viruses, on the surface of infected tissue comprising a first source for directing diagnostic excitation radiation at a target site to produce resonance Raman scattering (RRS) representative of the organic micro-organisms;
- a second source for directing UVC radiation at the target site surface to destroy or compromise detected micro-organisms;
- detecting means for detecting Raman scatter at said target site when diagnostic excitation impinges on the organic micro-organisms;
- determining means for determining whether said detected Raman scatter is indicative of the presence of a micro-organism sought to be destroyed or compromised;
- activation means for activating said second source for directing UVC radiation at the organic micro-organisms issuing said Raman scatter to destroy or compromise the organic micro-organisms only when these are determined to be the organic micro-organisms sought to be destroyed or compromised.