fish disease: vibriosis in fish
Cause: Vibrio alginolyticus, V. parahaemolyticus, V. vulnificus, V. ordalii, etc..
Bio - Ecology Pathogens
• Bacteria in sea water ecosystems, and vibirosis still
is a major problem for marine fish farming industry.
• The case of vibriosis can occur throughout the year, but commonly associated with stress due to handling, high density or changes in extreme weather.
• The death rate of fish at the larval stage up to the size
fingerlings are attacked by the bacteria may reach 80-90%.
Clinical Symptoms:
• Weak, loss of appetite, swim in the water surface, and opaque color.
• Inflammation of the rectum, gills, mouth, base of fin, followed by bleeding and blisters on the surface of the body, as well as open wounds.
• In advanced infection of bleeding in the mouth and base of fins, excess mucus in the gills, dropsy, pale liver color. and eyes swollen.
Diagnosis
• Isolation and identification of bacteria through a bio-chemical tests
Control:
• Disinfection of aquaculture facilities before and during the maintenance of fish
• Giving immunostimulan element (eg addition of
vitamin C in feed) are routinely during maintenance
• Avoiding the occurrence of stress (physical, chemical, biological)
• Management of fish health in an integrated (fish, environment and pathogens)
• Limit and / or regulate feeding and mixing of feed with drugs (medicated feed and feed restriction)
• Conducting anti-vibriosis vaccination.
source: Ministry of Maritime Affairs and Fisheries of Indonesia, Directorate General of Aquaculture, Fish and Environmental Health Directorate, 2010
