This book focuses on the ever-increasing knowledge about the relationship of pathogenic microorganisms to human disease and the application of that knowledge to the diagnosis and treatment of these illnesss. It covers the basic and clinical aspects of microbiology, immunology, bacteriology, virology, mycology and parasitology through a consistent format in which the morphology and identification, pathogenesis, clinical findings, diagnostic lab tests, treatment, and prevention and control of each organism is discussed. The book also includes a chapter on clinical correlations that features cases with brief discussions of the differential diagnosis and management of infections. The 22nd edition will be updated throughout and two to three new cases (anthrax, plague and botulism) will be added to the clinical correlations chapter. Recognizing the need to offer this information in as concise a format as possible, the authors will reduce the virology section by approximately 50 book pages.