The economic importance of bacterial fish diseases and the increased understanding of the taxonomy and pathology of fish that has occurred during the last ten years, has resulted in this completely revised and updated edition of Biological Fish Pathogens, first published in 1987. The book provides comprehensive coverage of bacterial fish pathogens and, crucially, diagnostic methods of identification and techniques for isolating those pathogens. The authors also discuss methods used to control bacterial fish diseases, and consider possible future trends in the study of pathogens. Finally, they review the emerging role of fish pathogens in human diseases. The book will be welcomed by practising aquaculturists, veterinary microbiologists, researchers in industry and in academia. It is an essential reference work for graduate and post-graduate students working in the areas of fish health.