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International Journal of Marine Science 2014, Vol.4, No.69, 1-3
http://ijms.biopublisher.ca
2
2 Result and Discussion
As the result of investigation of 30 fish specimens of
Parasilurus triostegus
where collecting from Al-
Hummar Marsh south of Iraq ,during the years 2013.
One plerociecoide species of
Triaenophorus nodulosus
cestode parasite isolated from fish and one
plerocercoied species
T. crassus
parasites were found
in the intestinal.
Phylum: Platyhelminthes
Class: Cestoda
Subclass: Eucestoda
Order: Bothriocephalidea
Family: Triaenophoridae Loennberg, 1889
Genus:
Triaenophorus
1- Triaenophorus crassus
Forel, 1868
Synonyms:
Triaenophorus robustus
Olsson, 1893
Site of Infection: Intestine
Host
: Parasilurus triostegus
2-
Triaenophorus nodulosus
(Pallas, 1760) Rudolphi,
1819
Synonym:
Triaenophorus
sp. type
nodulosus
of
Cooper, 1919 (partim)
Site of Infection: intestinal
Host:
Parasilurus triostegus
Prevalence: 3.3%
Intensity: 1
All plerocercoids were identified as
T. nodulosus
and
T.crassus based
upon the morphological characteristics
of the hooks on the scolex (Figure 1, 2). Plerocercoid
larvae of
Triaenophorus nodulosus
were frequently
observed in the intestinal, while the
T.crassus
encapsulated parasite isolated from muscles of fish.
Each plerocercoid is enclosed in a cyst; the cyst is
usually yellowish in color, typically spindle-shaped
and from 200 mm in length. The worm is a long,
coiled, white thread 125-133 mm long.
At one end is a complete scolex formed as in the adult;
the strobila is not recognized, plerocercoids are found
within a single cyst.
T. crassus
largest scolex hooks;
T.
nodulosus
: smallest scolex hooks with pronounced
median prong large,
T. nodulosus
is smaller than
T.
crassus
and has much smaller scolex hooks. The
presence of a median prong on the scolex hooks is
distinctive. The scolex and hooks of this species are
shown in Figure 1, 2. Dimensions of the scolex hooks
of
T. crassus, T. nodulosus
width of species basal plate
T. crassus
1.25 mm diameter
T. nodulosus
1.25~1.50 mm.
Figure 1 A, B micrographs of scoleces with characteristic
hooks 10X, A drawing with camera Lucida scale bare 0.5 mm,
C micrographs of scoleces with camera Lucida scale bar 0.05
mm, D hooks of
T. nodulosus
and
T. crassus
scale bar 0.05 mm
Figure 2 Micrographs of scolex with characteristic hooks 10X,
B- micrographs of scolex with drawing camera lucida scale
pare 0.5 mm, C- plerociecoid