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 µm).
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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