OVERVIEWS OF THE TREATMENT AND CONTROL OF COMMON FISH DISEASES

Abstract

Similar to other animals, fish can also suffer from different diseases. All fish carry pathogens a nd parasites . Disease is a prime agent affecting fish mortality , especially when fish are young. Pathogens which can cause fish diseases comprise: viral infections, bacterial infections , fungal infections, protozoan infections, water mould infection, etc. F ish are also exposed from different environm ental pollutants, including drugs and chemicals. The most c ommon fish diseases, particularly in freshwater aquaria , include columnaris, gill disease, ick (ich), dropsy, tail and fin - rot, fungal infections, white spot disease, pop - eye, cloudy eye, swim blad der disease, lice and nematode worms infestation, water quality induced diseases, constipation, anorexia, chilodonella, ergasilus, tuberculosis, glugea, henneguya, hexamita, hole - in - the - head disease , i njuries, l eeches in aquaria , lymphocystis, marine velve t, and neon - tetra disease, etc. Antibiotics are frequently used to control fish diseases caused by bacteria, but there is an increasing risk of developing an tibiotic resistant strains of bacteria. The non - specific immune functions such as bacteriolytic act ivity and leukocyte function of fish have been improved by some herbs. Plants have been used as traditional medicine since time immemorial to control bacterial, viral, fungal and other diseases.