Students and instructors have made Microbiology: An Introduction the #1 non-majors microbiology text, praising its careful balance of microbiology concepts and applications and its straightforward presentation of complex topics. The Seventh Edition Media Update includes a new laboratory simulation CD-ROM, VirtualUnknown™ Microbiology; the Microbiology Interactive Student Tutorial CD-ROM; and access to the resource-rich Microbiology Place web site.