Now completely up to date and featuring a new international author team, Marsh and Martin's Oral Microbiology, 7th Edition , remains the microbiology reference of choice for undergraduate and postgraduate dental students, researchers and a wide range of clinical dental professionals. Using a unique ecological approach, this popular textbook describes the complex relationship between the resident oral microbiome and the host in health and disease, providing a clear set of principles to explain whether the microbiota will have a beneficial or an adverse relationship with the host at a particular site. Explores the biological and clinical significance of the oral microbiota in the form of a biofilm on dental and mucosal surfaces Emphasises current concepts on the aetiology of dental caries and periodontal diseases , and reflects upon the impact that the genomic era has had on the field. Contains a new chapter describing traditional and contemporary (molecular) methods to determine the microbial composition and metabolic activity of the oral microbiome; expanded content on infection control in dentistry, including the impact of COVID-19; and in-depth chapters on the involvement of viruses, fungi and bacteria in orofacial infections and the role of oral microorganisms in systemic diseases. Features a visually appealing, full-colour design and Key Points throughout that help make learning more focused and efficient Includes self-assessment questions in each chapter that allow you to monitor your progress and identify areas for further study An eBook version is included with purchase. The eBook allows you to access all of the text, figures, and references, with the ability to search, customize your content, make notes and highlights, and have content read aloud.