NEWARK, Del.--(BUSINESS WIRE)--SDI (Strategic Diagnostics Inc., NASDAQ: SDIX), a leading provider of biotechnology-based products and services for a broad range of food safety, life science and industrial applications, today announced it has been awarded U.S. Patent No. 7,521,201 B2 for using bacteriophages in microbiological assay tests and processes. The invention is a rapid bacterial detection method that reduces or eliminates the growth of undesirable bacteria, resulting in improved test performance.