Fig. (3).

Antibacterial and antifungal efficacy of Cu, Cu++ and Cu+ ions. A) Staphylococcus aureus bacteria were homogenously plated in agar plates, followed by the addition of Cu, CuO and Cu₂O particles (in strips). After 24 hours of culture at 37°C the bacteria formed colonies (beige areas). Notice no growth of bacteria especially around the strip of Cu2O particles; B) Cu, CuO and Cu₂O particles (in strips) were added to agar plates. A Trichophyton rubrum colony was plated at the side of the plate. The pictures show the growth of the fungi after 4 days of culture at 37°C. plates without copper served as a negative control. Notice the inhibition of growth of the fungi especially when exposed to the cuprous particles. Experiment was conducted in duplicates.