Donn B. Tatum has joined the board...

Donn B. Tatum has joined the board of directors of Disease Detection International Inc., Irvine. His appointment brings the number of directors to four. Tatum, the former chairman and chief executive of Walt Disney Co., serves on the boards of Disney, Western Digital Corp. and three mutual funds. He also works as a consultant and is director and chairman of the John Tracy Clinic and trustee of St. John’s Hospital Medical Foundation. Disease Detection develops tests for infectious and sexually transmitted diseases.