INHIBITION OF SALMONELLA-TYPHIMURIUM ON AGAR MEDIUM AND POULTRY SKIN BY ULTRAVIOLET ENERGY

Ultraviolet radiation (UV) was effective in destroying Salmonella typh imurium on agar plates and poultry skin. Agar plates inoculated with v arying numbers of colony-forming units (CFU) of S. typhimurium (1.2 X 10(2) to 1.7 X 10(9)) were subjected to different doses of UV right to determine optimal killing. Poultry skin was also inoculated with vary ing CFU of S. typhimurium per 2 cm(2) of skin and subjected to UV ligh t. UV light treatment of inoculated agar plates revealed almost comple te elimination (99.9%) of S, typhimurium at 2,000 mu W . s . cm(-2). B acterial reduction was less effective on the surface of poultry skin w hen a 80.5% reduction in S, typhimurium was obtained at 2,000 mu W . s . cm(-2).