This book is composed of three parts. Part 1 is concerned with principles of bacteriology and is made up of thirteen chapters. Part 2 deals with medical bacteriology and is covered in sixteen chapters. Part 3 is concerned with serology and immunity, which is discussed in three chapters; it has a glossary, National Board examinations in bacteriology and immunology, State Board questions in veterinary bacteriology, State Board questions and answers for nurses in bacteriology, serology, infection and immunity and finally Maryland State Board questions for nurses. Numerous charts are included for differentiating and classifying the various microbial species. The book has real merit in outlining and classifying knowledge in the field of bacteriology and should prove useful to the physician.