Whirling disease is the disease of freshwater salmonid fish caused by the myxozoan parasite Myxobolus cerebralis. The parasite has never been detected in Australia, but is present in New Zealand and areas of North America, Europe, Africa and Asia. Whirling disease is a reportable disease in...

Bacterial disease is a major cause of stock loss in aquaculture. The severity of infection may range from acute to chronic through to benign. This latter condition, termed covert infection, is insidious, as fish may appear to be outwardly healthy but during periods of stress, these carriers may...

Megalocytiviruses are a group of closely related viruses that cause mass mortalities in both marine and freshwater aquaculture. They are of global importance as they are listed by the World Animal Health Organization (OIE). They are difficult to control as they infect over 125 fish species and...