This textbook provides a comprehensive introduction to the study of bacteria, including their structure, metabolism, and pathogenicity. It is intended for use by students and practitioners of medicine, and includes numerous case studies and practical examples to aid in understanding. With its up-to-date coverage of the subject matter and clear, concise explanations, this book is an essential resource for anyone studying bacteriology. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.