CONTENTS xi 



Elimination of Fish 284 



Preliminary Operations 284 



Decontamination 285 



Maintenance of the Hatchery 285 



Defense Mechanisms of Fishes 286 



Immunization of Fishes 288 



Vaccination Methods 288 



Fish Disease Policies and Regulations 289 



Diseases of Fish 294 



Viral Diseases 294 



Infectious Pancreatic Necrosis (iPN) 294 



Viral Hemorrhagic Septicemia (VHS) 295 



Infectious Hematopoietic Necrosis (IHN) 296 



Channel Catfish Virus Disease (CCV) 298 



Herpesvirus Disease of Salmonids 298 



Lymphocystis Disease 299 



Bacterial Diseases 300 



Bacterial Gill Disease 300 



Columnaris Disease 302 



Peduncle Disease 303 



Fin Rot 304 



Furunculosis 304 



Enteric Redmouth (ERM) 306 



Motile Aeromonas Septicemia (MAS) 307 



Vibriosis 310 



Kidney Disease 312 



Fungus Diseases 314 



Protozoan Diseases 315 



External Protozoan Diseases 315 



Ichtyobodo 315 



Ichthyophthirius 316 



Chilodonella 319 



Epistylis 319 



Trie hod ina 320 



Ambiphrya 321 



Trichophrya 323 

 Internal Protozoan Diseases 323 



Hexamita 323 



Henneguya 324 



Ceratomyxa 326 



Myxosoma 32 7 



Pleistophora 328 

 Trematode Diseases (Monogenetic) 329 



Gyrodactylus 330 



