Pathogen: parasitic flagellar protozoa.

Parasite life cycle:
1) spores settle on the skin, fins and gills of fish, where they attach and become parasites.
2) After 3-6 days, mature parasites fall away and begin to increase in size, forming a cystic
3) Inside the cyst, the unicellular parasite begins to divide, forming! up to 250 disputes!
4) Disputes come out of cysts
5) Mature spores can live without a host for several days.

Pathogenesis: A mobile parasite spore that has a flagellum can live in a free state for at least a day, even a few days. Transmitted from one fish to another. The parasite can be brought into the aquarium with new fish. Sometimes oodinum greatly affects the gills and the fish dies before the main clinical symptoms of the disease appear. If the parasite has settled in the intestine, it is difficult to get rid of it and repeated outbreaks of the disease (relapses) are possible.
Clinical picture: Plaque on the body and fins, gray-yellow (golden) color, hence another name for the disease is "velvet disease." Fish struggle to breathe, rub against stones. With severe infection, they become apathetic, refuse food, and practically do not move. The skin can peel off in stripes. Sometimes this disease is confused with ichthyophthyriosis, but with oodiniosis, fish look as if they were sprinkled with "gold dust"

Treatment: For the treatment of oodiniosis, fish are seeded into a quarantine aquarium. In an infected aquarium (without fish), the temperature is increased to get rid of free-living parasites. Drugs used in the treatment of oodiniosis: Sera omnipur, Sera oodinopur, JBL Oodinol, Tetra Medika General Tonic.