Features of the Fourth Edition

Completely updated and including the most current topics in microbiology today, Microbiology: A Human Perspective, fourth edition, continues to be a classic. It has always been our goal to present sound scientific content that students can understand and rely upon for accuracy and currency, so that they can succeed in their preparation for meaningful careers. We have used constructive comments from numerous microbiology instructors and their students to continue to enhance the robust features of this proven text.

Expert Approach to Writing

We, as a strong and diverse team of scientists and teachers, solidly present the connection between microorganisms and humans. Because of our individual specializations and our research and educational backgrounds, we remain in the hub of the scientific community and can provide accurate and modern coverage spanning the breadth of microbiology. More importantly, as teachers, we constantly strive to present material that easily speaks to the students reading it.

We recognize that a textbook, no matter how exciting the subject matter, is not a novel. Few students will read the text from cover to cover and few instructors will include all of the topics covered in their course. We have used judicious redundancy to help present each major topic as a complete unit. We have avoided the chatty, superficial style of writing in favor of clarity and conciseness. The text is not "watered down" but rather provides students the depth of coverage needed to fully understand and appreciate the role of microorganisms in the biological sciences and human affairs.

"The writing style is very clear, precise, and student friendly. For example, the descriptions of innate and adaptive immunity, their roles and how they interact, are the best of their kind that I have encountered in any textbook" (Kim Burnham, Oklahoma State University)

"I loved the analogies and the simplicity of the writing" (Kathleen Lauber, College of Southern Maryland)

Instructive Art Program that Speaks a Thousand Words

Microorganisms, by definition, are invisible to the naked eye. It becomes ever more important to allow students to visualize organisms as well as processes to reinforce learning. The art program continues as a key element of the learning process. Each figure in Microbiology: A Human Perspective was developed as the narrative was written and is referenced in bold in the supporting text. Colors and symbols are used consistently throughout the text. Legends are short, clear, and descriptive. Various types of art styles are used as needed to bring concepts to life.

Overview Figures simplify complex interactions and provide a sound study tool. Image Pathways help students to follow the progression of a discussion over several pages by highlighting and visualizing in detail each step of an overview figure. Process Figures include step-by-step descriptions and include supporting text so that the figure walks through a compact summary of important concepts. Combination Figures tie together the features that can be illustrated by an artist with the appearance of organisms in the real world. Stunning Micrographs used generously throughout the text bring the microbial world to life. In the

Preface xxv chapters presenting infectious diseases, these are often combined with photographs showing the symptoms that the organisms cause.

Unmatched Clinical Coverage

Evans Roberts, Jr.—a member of the author team who is licensed and board certified in internal medicine by the American Board of Internal Medicine, and in public health and medical laboratory microbiology by the American Board of Microbiology—ensures that clinical coverage is accurate, modern, and instructive to those planning to enter health careers. The incomparable treatment of infectious diseases, which are organized by human body systems, is supported with generous photographs, summary tables, case histories, and critical-thinking questions. Elements ofthe unparalleled clinical coverage include:

■ Consistent coverage of all diseases, including individual sections that describe the symptoms, pathogenesis, causative agent, epidemiology, prevention, and treatment.

■ Disease summaries that feature a drawing of a human showing symptoms, portals of entry and exit, location of pathology, and a step-by-step description of the infection process for each major disease.

■ Case presentations of realistic clinical situations.

■ Modern coverage of topics such as emerging diseases, new vaccines, and nosocomial infections.

■ Dedicated chapters covering wound infections and HIV.

Learning System that Actively Involves Students

In today's classroom, it is important to pursue active learning by students. This edition of Microbiology challenges students to think critically by providing several avenues of practice in analyzing data, drawing conclusions, synthesizing information, interpreting graphs, and applying concepts to practical situations. These learning tools, developed by critical thinking expert Robert Allen, will benefit students pursuing any discipline.

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