A review on DNA viral diseases of fish

Aquatic animal species are cultured in high stocking density in various water bodies where they become more susceptible to new diseases. The number of viruses isolated from fish grew steadily over the last couple of decades. Both DNA and RNA viruses causing high mortality among commercially important cultivable fishes have been studied last two decades. Most of the viruses described are considered to be serious pathogens and hence are economically important in the aquaculture systems. Viral infections with dermatologic manifestations are common in many tropical countries of the world. Some of the DNA virus groups including herpesviruses, adenovirus, polyomavirus, poxvirus and iridoviruses cause disease resulting in important economic losses of aquaculture production. The present review was based on DNA genome containing virus diseases are one of the major challenges that are threatening a sustainable growth of fish farming and wild populations.