Isopodiasis (fish disease)

Isopodiasis (fish disease)

Cause: Nerocilla orbiguyi, Alitropus typus, etc..
Bio-Ecology Pathogens:
• Isopod which is a blood-eating parasites 'blood feeder' relatively large size (10-50 mm), and its body consists of several segments that are equipped with a pair of eyes.
• infected at all stages of fish and most fish are susceptible to parasitic infections, especially in the fish scales.
• Sticking to the body surface of fish, in the mouth, nostrils or gill cover.
• Transmission occurs horizontally, and the trigger between
because of water conditions and high density.

Clinical Symptoms:
• Wounds and bleeding at the site of the bite, and this looks visually parasites attached to the body of the fish, especially under the scales or on the base of the fin.
• Loss of balance, weakness, and decreased appetite.
• Nekrosa the gill or skin tissue of fish.
• slow-growing fish, often resulting in death due to anemia or due to secondary infection by bacteria.
Diagnosis:
• Visually looks a parasite that attach to the body of the fish.

Control:
• shed the parasite in the container is limited to chemicals that contain active ingredients dichlorfos at concentrations 5-7 ppm for 60 minutes.
• After the parasitic loss, the fish was transferred to another container to prevent any secondary infection by bacteria in the parasite bites.
• Using the spot light at night to collect the parasite in one location, then elected to the net.


source: Ministry of Maritime Affairs and Fisheries of Indonesia, Directorate General of Aquaculture, Fish and Environmental Health Directorate, 2010