Morphological, physiological, and serological studies on 55 myxobacteria isolated principally from gill disease, tail rot, and other myxobacterial infections showed that a variety of myxobacteria occur in these infections. Athought there were different morphological types of myxobacteria, all strains from freshwater and estuarine sources were physiologically similar. Isolates from marine sources were physiologically less active than the other test organisms.

This second edition of the book Fish Diseases and Disorders, Viral, Bacterial and Fungal Infections volume 3 represents a major update on the viral, bacterial and oomycete disorders of finfish and shellfish. Since publication of the first edition (in 1999), considerable advances have been made and therefore all the chapters have been thoroughly revised. The new and more eloquent research and current techniques have extended our knowledge and understanding of these infectious organisms. Researchers from Europe, North America, Australia and Asia have been involved in updating this book. With the addition of new information, some of the older texts in the original chapters have been condensed; this is to ensure a more focused and comprehensive reviews. For this edition, deletion and/or combination a couple of the original chapters, have been made and added three new chapters (Chapter 6 on 'Alphaviruses', Chapter 7 on 'Oncogenic Viruses' and Chapter 21 on 'Genomics of Finfish and Shellfish Microbial Pathogens'), which have been written by new authors. There are 22 new authors who have offered to write new chapters and/or update many of the original chapters. The aims, philosophy, focus, audience and format of this second edition have remained unchanged, and the authors hoped that this edition will continue to be useful to colleagues.

Bacterial Fish Diseases: Environmental and Economic Constraints will be useful for researchers and academics who need to understand the nature and consequences of bacteria-related disease in fishes. It has in-depth information on the complete genome of various bacterial species and identifies an essential number of virulence genes that affect the pathogenic potential of the bacteria in fish. Users will find the most relevant information derived from the available bacterial genomes concerning virulence and the diverse virulence factors that actively participate in host adherence, colonization and infection, including structural components, extracellular factors, secretion systems, iron acquisition and quorum sensing mechanisms. This reference is beneficial for understanding economic losses due to bacterial pathogens in fish fauna and its impact on the economy. It addition, it provides information on good aquaculture practices and how to scientifically manage aquaculture and fishery sectors. - Presents bacteria-related diseases in fish species, highlighting problems associated with the culturing of fish - Discusses pollution contamination in freshwater ecosystems to provide insights into the sustainable management of fish species - Provides fundamental research concepts of fish health, along with practical research methods