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First record of plerocercoid larvae belong to the order Trypanorhyncha (Diesing 1863) isolated from swordfish (Xiphias gladius, Linnaeus 1758) captured off Sri Lanka

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dc.contributor.author De Silva, D.P.N.
dc.contributor.author Fernando, H.S.D.
dc.contributor.author Ranatunga, R.R.M.K.P.
dc.contributor.author De Silva, B.G.D.N.K.
dc.date.accessioned 2018-12-18T06:07:41Z
dc.date.available 2018-12-18T06:07:41Z
dc.date.issued 2017
dc.identifier.citation De Silva, D.P.N., Fernando, H.S.D., Ranatunga, R.R.M.K.P., De Silva, B.G.D.N.K.,(2017)."First record of plerocercoid larvae belong to the order Trypanorhyncha (Diesing 1863) isolated from swordfish (Xiphias gladius, Linnaeus 1758) captured off Sri Lanka",Sri Lanka J. Aquat. Sci. 22(1),pp.67-70 en_US
dc.identifier.uri http://dr.lib.sjp.ac.lk/handle/123456789/7864
dc.description.abstract attached en_US
dc.description.abstract Parasitism leads to severe economic losses to marine fish exports in Sri Lanka. Swordfish is a seasonal species with high demand both locally and internationally. Presence of a parasite in their flesh confuses the suppliers with zoonotic Anisarkis spp. This study is aimed to identify the plerecercoid parasitic larvae found in swordfish and establish a feasible method of diagnosis at fish processing factories. Parasites buried in frozen swordfish (Xiphias gladius) muscles were isolated and stored in cold sea water. Samples were washed with normal saline water and observed under bright field light microscope at 40x and 100x magnifications, and the parasites were identified based on their morphological features. For further confirmation, confocalmicroscope was used to record scolex parameters. Total length of the parasites was 1.7 cm– 3.5 cm (2.27 cm). Presence of the elongated, acraspidote scolex (length 6.23 mm, width at pars bothridialis 2.4 mm) with four tentacular armature and curved, apically inverted, thick edged bothridia confirmed the parasitic larvae belonged to the Order Trypanorhyncha. Corona of falciform hooks in the basal armature and the heteromorphous hooks in a half spiral arrangement at metabasal armature are characteristics of the genus Molicola. This is the first record of the Trypanorhynch plerocercoid larvae (genus:Molicola) isolated in swordfishes from Sri Lanka. This study emphasizes that morphological examination of the parasite scolex using bright field microscopy will be helpful to distinguish the parasitic genera and feasible to use in the fish processing factories.
dc.language.iso en en_US
dc.subject Trypanorhyncha en_US
dc.subject Molicola en_US
dc.subject Swordfish en_US
dc.subject scolex en_US
dc.subject cestode en_US
dc.subject parasite en_US
dc.title First record of plerocercoid larvae belong to the order Trypanorhyncha (Diesing 1863) isolated from swordfish (Xiphias gladius, Linnaeus 1758) captured off Sri Lanka en_US
dc.type Article en_US


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