Classification: Taxonomic ranks under review (cf. Illustrated Guide to Protozoa, Allen Press). Protista (unicellular eukaryotes) Ciliophora (with cilia, nuclear . Ichthyophthirius multifiliis is a ciliated protozoan that causes. “Ich” or “white spot disease.” This disease is a major prob- lem to aquarists and commercial fish. The name Ichthyophthirius multifilis translates to “fish louse with many children”, a title that fits well, as each parasite may produce more than a.

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The parasite forms three developmental stages: First, formalin is a solution of formaldehyde gas dissolved in water, therefore use caution when adding it to the aquarium to avoid inhalation and skin and eye contact.

Retrieved from ” https: Ichthyophthriius growing trophozoite do not reproduce on the fish, but when they reach a certain size, they leave the pustules as tomonts and encyst on plant surfaces or on the bottom of the fish tank.

Because copper sulfate is an algaecide, its use may lead to severe oxygen depletions; therefore, emergency aeration should always be available. Outbreaks occur when conditions are favourable for rapid multiplication of the parasite. Gill examination may reveal numbers of white spots or wet mount of a gill ihthyophthirius a biopsy may reveal the trophonts.


Squirmidae FilipodiumPlatyproteum. Also, formalin removes oxygen from the water and can damage the gills of the fish, so adding an air stone during treatment is highly recommended.

Treatment protocols should be designed to target this theront stage. From Wikipedia, the free encyclopedia. A sub-clinically infected fish will not show any of these ichthyoputhirius.


However, poor water quality stresses fish, which allows an outbreak to spread rapidly and increases mortality rates. The disease is particularly severe when fish are crowded. Ichthyophthirius multifiliis Cichlid showing the white spots characteristic of ich Scientific classification Domain: Fish surviving infection exhibit some protective immunity against subsequent infections.

Ichthyophthirius multifiliis – Wikipedia

However, two facts are essential to know prior to using in an aquarium. Multifiliiis a cyst, multiplication takes place and small ciliated cells which become tomites are formed. Oligohymenophorea Fish diseases Ectoparasites Veterinary protozoology. Ichthyophthirius multifiliis is a ciliate protozoan and infects freshwater fish to cause Ich or White Spot disease.

Within minutes, the parasites penetrate deeper into epithelial or epidermal tissues where they feed and grow increasing their volume up ichthyophthirrius 3, times.

This will reveal the ciliates. Periodic flushing of tanks and ponds with clean fresh water helps to reduce contamination levels.

Because of the covering by this epithelial tissue and mucus, the trophont stage is protected from chemical treatment. The eye becomes cloudy almost to the point of whiteness and the ichthyophhtirius lose vision.

Pages 55—72 In P.

Careful cleaning of the tank can help to treat an infestation with Ichthyophthirius multifiliis. When Ich infects the gills, the miltifiliis layer of the gills become inflamed, restricting the flow of oxygen to the blood.

Life cycle of Ich. When the water quality is suitable, the fish will usually recover by themselves within one to two weeks.


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Theronts can resemble other parasites especially Tetrahymenaso if only this juvenile stage is seen, prepare a second slide and examine it closely for the trophont stage to confirm the diagnosis. This can occur in a day or less at warmer water temperatures. There multitiliis peritoneal fluid exudation and gall bladder enlargement.

Fish that survive ichthyopnthirius Ich infection may develop at least a partial immunity, which paralyzes theronts that attempt to infect it. A sample of skin mucus can be taken and examined under light microscope.

Prevention of the disease includes an effective quarantine protocol, using separate equipment for each tank, buying tank plants which have never been in contact with fish, detecting and treating an infection promptly. The Institute of Food and Agricultural Sciences IFAS is an Equal Opportunity Institution authorized to provide research, educational information and other services only to individuals and institutions that function with non-discrimination with respect to multtifiliis, creed, color, religion, age, disability, sex, multifillis orientation, marital status, national origin, political opinions or affiliations.

These lesions look like small white dots, blisters, or salt grains on the skin or fins of the fish. Simplified scheme of iichthyophthirius life cycle of the fish parasite Ichthyophthirius multifiliis. In addition to chemical treatment, cleaning the tank will also decrease the number of parasites.