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เนื้อหาย่อ : A medical technician in a hospital microbiology laboratory uses a pipette in working with a specimen suspended in solution. Latex gloves protecting the hands are part of the infection control protocol that microbiologists follow in a clinical laboratory, where disease-causing organisms may be present. An example of one such organism is also shown on the cover. Superimposed onto the photograph is a colorized scanning electron micrograph of Bordetella pertussis cells. This rod-shaped bacterium is the infectious agent that causes pertussis, or whooping cough, which, while uncommon in the United States and Canada, causes 500,000 deaths worldwide and is a threat to children in any region where infants are not vaccinated against it. In Microbiology: A Human Perspective, you will learn about this and many other species of bacteria and types of microorganisms--how some can cause disease, while others contribute to our health or help in the growing of crops or in the preparation of foods and medicines. You will learn how microorganisms play a role in every aspect of the natural world; you will explore the fascinating universe of microscopic life, and how it relates to human health, in the pages of Microbiology: A Human Perspective.