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      Cavisoma magnum (Cavisomidae), a unique Pacific acanthocephalan redescribed from an unusual host, Mugil cephalus (Mugilidae), in the Arabian Gulf, with notes on histopathology and metal analysis Translated title: Cavisoma magnum (Cavisomidae), un Acanthocéphale exceptionnel du Pacifique redécrit à partir d’un hôte inhabituel, Mugil cephalus (Mugilidae), dans le golfe Persique, avec notes sur l’histopathologie et l’analyse des métaux

      1 , * , 2 , 3

      Parasite

      EDP Sciences

      Acanthocephala, Cavisoma magnum, Mugil cephalus, Chanos chanos, Arabian Gulf, redescription, SEM, histopathology, metal analysis

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          Abstract

          Cavisoma magnum (Southwell, 1927) Van Cleave, 1931 was originally described from a sea bass, Serranus sp. and spotted surgeonfish, Ctenochaetus strigosus (Perciformes) off Sri Lanka before its more recent redescription from milkfish in the Philippines in 1995. These reports were based on only light infections of their host fishes. Of the few flathead grey mullets, Mugil cephalus (Mugilidae), that we examined in the Arabian Gulf, one fish was infected with 1,450 worms. One milkfish, Chanos chanos (Chanidae), from the same location in the Arabian Gulf, was also heavily infected with specimens of C. magnum. The descriptions of this unique large worm are revised and for the first time, we provide SEM images, new systematic observations, metal analysis of hooks showing extremely high levels of sulfur, and histopathology in the mullet intestinal tissue. Adjustments and corrections of previous descriptive accounts are made. The histopathology studies show extensive damage to the host intestinal tissue including epithelial necrosis, hemorrhaging and worm encapsulation. There is an extensive amount of host connective tissue surrounding the worm. Results of x-ray analysis displayed high levels of sulfur in proboscis hooks, especially at the tips and edges of these attachment structures.

          Translated abstract

          Cavisoma magnum (Southwell, 1927) Van Cleave, 1931 a été décrit à l’origine à partir de spécimens parasites d’un Serranus sp. et du poisson-chirurgien Ctenochaetus strigosus (Perciformes) au Sri Lanka avant sa redescription plus récente à partir de spécimens parasites du chano aux Philippines, en 1995. Ces rapports étaient basés uniquement sur des infections légères de leurs poissons-hôtes. Parmi les quelques mulets à grosse tête, Mugil cephalus (Mugilidae) que nous avons examinés dans le golfe Persique, un poisson était infecté par 1 450 vers. Un chano, Chanos chanos (Chanidae), originaire du même endroit dans le golfe Persique, était également fortement infecté par des spécimens de C. magnum. Les descriptions de ce grand ver sont révisées et pour la première fois, nous fournissons des images en MEB, de nouvelles observations systématiques, des analyses des crochets montrant des niveaux extrêmement élevés de soufre, et l’histopathologie dans le tissu intestinal du mulet. Des ajustements et corrections des descriptions précédentes sont effectués. Les études histopathologiques montrent des dommages importants du tissu intestinal de l’hôte, y compris nécrose épithéliale, hémorragie et encapsulation des vers. Une grande quantité de tissu conjonctif de l’hôte entoure le ver. Les résultats de l’analyse par rayons X ont montré des niveaux élevés de soufre dans les crochets du proboscis, en particulier aux extrémités et aux bords de ces structures de fixation.

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          Most cited references 14

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          Fine structure and energy dispersive X-ray analysis (EDXA) of the proboscis hooks of Rhadinorynchus ornatus, Van Cleave 1918 (Rhadinorynchidae: Acanthocephala)

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            Morphological and molecular descriptions of Moniliformis saudi sp. n. (Acanthocephala: Moniliformidae) from the desert hedgehog, Paraechinus aethiopicus (Ehrenberg) in Saudi Arabia, with a key to species and notes on histopathology

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              Fishes of Arizona

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                Author and article information

                Journal
                Parasite
                Parasite
                parasite
                Parasite
                EDP Sciences
                1252-607X
                1776-1042
                2018
                9 February 2018
                : 25
                : ( publisher-idID: parasite/2018/01 )
                Affiliations
                [1 ] Institute of Parasitic of Diseases, 11445 E. Via Linda # 2-419, Scottsdale, AZ. 85259 USA
                [2 ] Department of Biology, Brigham Young University, 1114 MLBM, Provo, UT 84602 USA
                [3 ] Marine Vertebrate, Marine Science Center, University of Basrah, Basrah Iraq
                Author notes
                [* ]Corresponding author: omaramin@ 123456aol.com
                Article
                parasite170122 10.1051/parasite/2018006
                10.1051/parasite/2018006
                5806538
                29424340
                © O.M. Amin et al., published by EDP Sciences, 2018

                This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

                Page count
                Figures: 6, Tables: 3, Equations: 0, References: 20, Pages: 12
                Categories
                Research Article

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