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