Microbiology is one of the essential pharmaceutical sciences upon which the study and practice of pharmacy is built. It has a bearing on all aspects of the manufacture of medicines and sterile products, from their design and development to their delivery as quality products. Few interventions are more central to modern medicine than the treatment of infection, where antibiosis, vaccination and hygienic practices have essential roles to play. The COVID-19 pandemic, the appearance of new pathogens and the rise of antibiotic resistance have demonstrated most completely the need for pharmaceutical practitioners, researchers and industrial scientists to be fully conversant with this field. The 9 edition of has been updated to meet this need. Having long served as the sole comprehensive textbook covering this subject, it has now been adapted to a critical new period in the advancement of medical and pharmaceutical research and development. Its experienced editors have incorporated contributions from subject experts and created a text which will serve the next generation of pharmacy students, pharmaceutical industry scientists and researchers. In this ninth edition of readers will find: promises to remain the essential text for pharmacy and medical students, as well as researchers and industry professionals.