This new edition has been almost entirely re-written and re-organized. Microorganisms are now discussed in their entirety within single chapters as opposed to being spread out throughout the book. The first three sections of the book cover the foundations of microbiology, followed by comprehensive sections on bacteriology, virology, parasitology and mycology. The chapters in Part IV have been organized into sections based on test results and then on microorganism type, a breakthrough organization for microbiology textbooks. Several new chapters have been added, including taxonomy, genetics, bacterial identification, and susceptibility testing.