In a study at the University of Illinois (Chicago), mice infected with human melanomas but treated with Azurin showed smaller tumours and no illnesses or deaths. Azurin is a protein made by bacteria daily in their energy production mechanisms. The treatment involved the use of bacteria called Pseudomonas Aeruginosa, which are resistant to antibiotics and can cause infection in people with lowered immune systems. Mice treated with the Azurin bacteria had tumours 60 per cent smaller in the control group after 22 days. (National Academy of Sciences 22:14098-103)