Dactylogyriasis (Worms Gills)

Dactylogyriasis (Worms Gills)

Cause: Dactylogyrus spp., Cychlidogyrus spp., Quadricanthus spp.

Bio-Ecology Pathogens

• Ekto-obligate parasites that are parasitic and reproduce by laying eggs
• infect all species of freshwater fish, especially the size of the seed. Transmission occurs when infective face (Onchomiracidium).
• Dactylogyrus spp. has 2 pairs of eye point, and at the tip of his head there are 4 bumps. Cychlidogyrus spp. shape is more flattened at both ends, and only has a pair of eye point. Quadricanthus spp. shape
Dactylogyrus similar spp., and has a host of species that target specific groups of catfish.
• Severe infections can kill 30-100% within a few weeks

Clinical Symptoms:
• pale body color, decreased appetite, thin, nervous and slow
• Respiratory frequency increased, the production of excess mucus in the gills and often cavort
• Gather / closer to the water inlet
• Gills pale or swollen so that the open operculum

Diagnosis:
• Visual observation of behavior and clinical symptoms that arise
• Microscopic observation to see morphology
parasites through the production segment of the organ gill preparations.

Control:
• Maintaining water quality, especially the stabilization of the water temperature> 29 degrees Celsius
• Reducing the levels of dissolved organic material and / or increase the frequency of water changes
• Dactylogyriasis attacked fish with prevalence and intensity level is low, treatment can be done by soaking several types of disinfectants, among others:
✓ salt solution at a concentration 500-10000
ppm (depending on the type and age of fish) for 24 hours
✓ Solution Potassium Permanganate (PK) at a dose of 4 ppm for 12 hours
✓ formalin solution at doses of 25-50 ppm for 24 hours or more
✓ Glacial acetic acid 0.5 ml / L for 30 seconds every 2 days for 3 - 4 times

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