The seventh edition of this text represents a comprehensive update to our audience of the increasingly complex and challenging realm of diagnostic microbiology. Koneman’s Color Atlas and Textbook of Diagnostic Microbiology is in recognition of Elmer W. Koneman as one of the founding authors of this classic text and a driving force behind publication of the first six editions. Dr. Koneman has continued to provide guidance and editorial support, so his expertise remains an important part of this seventh edition. The seventh edition welcomes back long-time authors Drs. Paul C. Schreckenberger and William (Bill) M. Janda, who share their in-depth expertise of bacteriology. Dr. Gail Woods also returns to share her worldrenowned expertise in mycobacteriology. This edition welcomes Dr. Deirdre Church, a premiere clinical microbiologist and infectious diseases clinician, and Dr. Gerri Hall, who shares her in-depth expertise in anaerobic bacteriology, mycoplasmas, and aerobic actinomycetes. It is a pleasure to join this august company in the production of this next edition of Koneman’s Color Atlas and Textbook of Diagnostic Microbiology