Pictoral of Parasites

Pictoral of Parasites


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PICTORAL OF PARASITES AND DISEASE ORGANISMS
movies and pictures from: Frank Prince-Iles
FishDoc

Movies
Click on photos to see the movie

Chilodonella

Chilodonella (315 kb) Shows Chilodonella at 100 x magnification. The parasite is flat, oval to heart shape with a notched anterior end. Characteristic gliding action, moving slowly and turning in circles. Flattened shape can be seen when the parasite turns sideways.

Ichthyodobo

Ichthyobodo - (Costia) (373 kb) Costia shown at 600 x magnification. A very fast moving parasite. Characteristic flickering motion as it turns its crescent-shaped body.

Argulus Fish Lice

Argulus 01 (fish louse) (285 kb) High power magnification giving a fish's view of this nasty parasite. It shows the highly flexible suckers that the louse uses to attach to the fish's body. In between the suckers you can see a large, flexible proboscis-like mouth that the louse uses to suck out the fish's body fluids - nice!

Flukes: Gill Dactylogyrus

Gyrodactylus (skin fluke) (378 kb) Gyrodactylus can be differentiated from Dactylogyrus by the absence of eye-spots. This movie shows Gyrodactylus at 100x magnification. Note the embryo clearly visible in abdomen (the hooks of the embryo are visible). Also note the arrangement of attachment hooks at rear end.

Flukes: Skin Gyrodactylus

Gyrodactylus (skin fluke) (378 kb) Gyrodactylus can be differentiated from Dactylogyrus by the absence of eye-spots. This movie shows Gyrodactylus at 100x magnification. Note the embryo clearly visible in abdomen (the hooks of the embryo are visible). Also note the arrangement of attachment hooks at rear end

Trichodina

Trichodina (from the gill of a koi) (358 kb) High power (x600) shows trichodinids grazing on the gill filaments of a koi. Note the whirling cilia (minute 'hairs' used for motion and to fan food into the mouth). Typical 'flying saucer' motion. Gill trichodinids are usually smaller than skin-dwelling trichodinids (<30 m).

White Spot Ichthyophthirius

Ichthyophririus multifilis (white spot) (376 kb) Shows typical wet mount at x100 magnification. Large dark parasites (trophonts) with typical horseshoe macronucleus clearly visible. White spot has a lazy rolling action. Note the variance in size of the trophonts.

Photos

FLUKES

Skin fluke, Gyrodactylus, showing the array of hooks on its opisthohaptor. It uses these to cling to the fish and move around in a jerking fashion

The same parasite showing a developing embryo already armed with hooks!
A fish's view of that fearsome opisthohaptor. The hooks can cause tissue damage and lead to secondary infections

Chilodonella

Chilodonella at 400x magnification (phase contrast)
Chilodonella as seen in a wet mount of a skin scrape

Costia (Ichthyobodo)

Histological section of a gill with a heavy infestation of Ichthyobodo (Costia) attach to the gill epithelium. The parasites feed on the cell contents. Note the pyriform shape,

Trichodina

This shows the outer rim of cilia and the central sucking disc with its hook-like denticles
Trichodinids in a wet mount (mucus) at low magnification
Trichodina on the edge of a gill filament. Note the density, with some sitting on top of others.

White Spot

White spot trophonts seen in at low power wet mount of a skin scrape. Note the light horseshoe shaped nucleus and the variation in size.
Histological preparation of gill tissue with embedded trophonts. Note the distortion to the gill tissue and severe hyperplasia.

Pictures placed here with permission from the author,
Frank Prince-Iles
FishDoc 

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