Abnormal swimming - streaks
Fish swims in short bursts, then stops.
Protozoan parasitic Flagellate. viz Costia necatrix. or Costia necator. The parasite is tear shaped under the microscope, with 2 locomotory flagellae. The parasite attaches to the skin and gills. Shows characteristic jerky movement under microscope.
In the chronic form, lower mortalities will occur, but if the infection becomes acute then heavier losses must be anticipated. Early detection, treatment, etc, will help prevent spread of the disease. Ichthyobodo outbreaks occur usually in the cooler months of the year.
Avoid overcrowding. Provide good husbandry.
Ichthyobodo infections on farmed and wild fish.
Methods for detection and identification of
Ichthyobodo spp.
From Dissertation for the degree of philosophiae doctor (PhD)
Bergen University 2013 Trond Einar Isaksen
Dr Prescott, Shawn
Fish Disease Dolau Ltd
Dolau
Wales