Histopathological lesions of Manila clam, Tapes philippinarum, from Hadong and Namhae coastal areas of Korea

Lee, Mu-Kun; Cho, Byong-Youl; Lee, Soo Jeong; Kang, Ji-Young; Jeong, Hyun Do; Huh, Sung‐Hoi; Huh, Min-Do

doi:10.1016/s0044-8486(01)00648-2

Cited by 61 publications

(31 citation statements)

References 16 publications

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“…Similarly, a protistan parasite in the ova of the blacklipped oyster, Saccostrea echinata (see Wolf 1977) could possibly be M. chungmuensis which has been recorded since then in Australia (Hine 1996). More recently, occurrence of a Marteilioides-like organism in Japanese carpet shell, Tapes philippinarum, in southern coast of Korea was also reported (Lee et al 2001). Another species of the genus, Martelioides branchialis, was described from Sydney rock oysters, Saccostrea glomerata, in Australia (Anderson and Lester 1992).…”

Section: The Palimpsest Of Paramyxean Taxonomymentioning

confidence: 96%

Marteiliosis in molluscs: A review

Berthe

Roux

Adlard

et al. 2004

Aquat. Living Resour.

101

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-Among mollusc pathogens, paramyxeans are an important group of protistan parasites belonging to the genera Marteilia and Marteilioides. Marteilia refringens and M. sydneyi are of particular concern given their potential impact on mollusc aquaculture world-wide. Aber disease and QX disease are currently listed by the OIE, the World Organisation for Animal Health. After more than thirty years of existence in the scientific literature, these organisms still pose questions and research challenges to investigators. This paper reviews current knowledge of the group and key references. The review was focused on taxonomy, epidemiology, pathology and potential control methods for these organisms in order to enhance understanding of paramyxean infection issues in mollusc aquaculture.Key words: Taxonomy / Epidemiology / Pathology / Diagnosis / Paramyxean parasites Résumé -Marteiliose des mollusques : une synthèse. Au nombre des agents pathogènes des mollusques, les paramyxéens, notamment les agents appartenant aux genres Marteilia et Marteilioides, sont des protistes parasites des plus importants. Marteilia refringens et M. sydneyi constituent un souci majeur compte tenu de leur impact potentiel sur la conchyliculture dans le monde. La maladie des Abers et la maladie du Queensland (QX) sont actuellement répertoriées par l'Office International des Epizooties. Après plus de trente années d'existence dans la littérature scientifique, ces organismes posent encore questions et défis aux investigateurs. Cet article fait l'état des connaissances sur le sujet en s'attachant plus particulièrement à la taxonomie, l'épidémiologie, la pathologie et les méthodes potentielles de contrôle de ces organismes dans l'optique d'une meilleure compréhension de la problématique des paramyxéens en conchyliculture.

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Section: The Palimpsest Of Paramyxean Taxonomymentioning

confidence: 96%

Marteiliosis in molluscs: A review

Berthe

Roux

Adlard

et al. 2004

Aquat. Living Resour.

101

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“…In these nodules, parasite trophozoites were found, surrounded by a capsule mainly composed of eosinophilic, granular hemocytes ( Fig. 6) (Lee et al, 2001;Park and Choi, 2001;Choi et al, 2005). In 1987, Chagot et al (1987) first described this inflammatory reaction in R. decussatus infected with Perkinsus parasites.…”

Section: Encapsulationmentioning

confidence: 99%

“…Histological studies demonstrated that these nodules were formed by inflammation as a consequence of a massive hemocyte infiltration into tissues (granuloma structure), surrounding Perkinsus trophozoites (Fig. 4), suggesting active migration of hemocytes from hemolymph into tissues (Lee et al, 2001;Park and Choi, 2001;Choi et al, 2005). Similarly, exposure of Manila clams to the harmful alga Prorocentrum minimum was reported to also induce an inflammatory response, characterized by massive hemocyte incursion into the digestive glands, intestine and stomach, as well as in the gonadal follicles from which hemocytes are ordinarily excluded (Hégaret et al, 2009).…”

Section: Chemotaxismentioning

confidence: 99%

Hemocytes of the carpet shell clam (Ruditapes decussatus) and the Manila clam (Ruditapes philippinarum): Current knowledge and future prospects

et al. 2009

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: Hemocytes are the immune effectors in clams, directing cellular but also humoral defences. In the Manila clam (Ruditapes philippinarum) and the carpet shell clam (Ruditapes decussatus), two phenotypically similar venerid species, fishery and aquaculture importance motivated scientific studies to improve knowledge about the participation of hemocytes in immune response. Currently, gaps still persist concerning the classification of hemocyte sub-populations as well as their non-immune activities. This review summarizes current knowledge about hemocytes of the Manila clam and the carpet shell clam, suggests some probable misinterpretations arising from extrapolations from other bivalves and vertebrates, and suggests future research prospects. The susceptibility of hemocytes to environmental modifications as well as biological and chemical toxicants is also re-evaluated. Hemocytes of bivalves are not limited in function to immunity and should be considered in a wider scheme including the environment and whole-animal physiology.

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“…Although hemocyte infiltration can increase with parasitic infection, no correlation was observed between parasite infection densities and hemocyte infiltration in B. heckerae or B. puteoserpentis. While hemocytes are important in molluscan internal defense, heavy hemocyte infiltration can hinder the normal flow of hemolymph, give rise to a reduction of host tissues needed for vital functions, and has been suggested as a possible cause of mass mortalities (Lauckner 1983, Villalba et al 1997, Lee et al 2001. …”

mentioning

confidence: 99%

Parasitism in species of Bathymodiolus (Bivalvia: Mytilidae) mussels from deep-sea seep and hydrothermal vents

Ward¹,

Shields²,

Dover³

2004

Dis. Aquat. Org.

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Bivalve species, especially mussels, are biomass dominants in many deep-sea chemosynthetic ecosystems. As in shallow-water environments, parasites are likely to be important factors in the population dynamics of bivalve communities in chemosynthetic ecosystems, but there has been little study of parasitism in deep-sea seep or vent molluscs. In this study, parasite types, diversity, prevalence, infection density and non-infectious indicators of stress or disease as related to host age, reproductive condition, and endosymbiont density were assessed in mussels (Bathymodiolus heckerae) from 2 seep sites and mussels (B. puteoserpentis) from 2 vent sites. We identified 10 microbial or parasitic agents in histological sections. Parasite types included 3 viral-like gut inclusions, 2 rickettsia-like gill inclusions, a rickettsia-like mantle inclusion, a bacterial gill-rosette, a chlamydia-like gut inclusion, gill-dwelling ciliates, and an unidentified inclusion in gut tissues. Parasite species richness was greater in seep mussels than in vent mussels, with the seep mussels possessing 9 types of parasites compared to 2 in the vent mussels. One of the viral-like inclusions infecting the seep mussel B. heckerae was pathogenic, causing lysis of the digestive tubules. The prevalence and intensity of infection by this pathogen were greater in hosts with shell lengths less than 100 mm. Mussels from all 4 sites also exhibited intense infiltration of tissues and blood spaces by enlarged hemocytes. Hemocytic infiltration (hemocytosis) showed variable degrees of severity that were not associated with other host factors examined.KEY WORDS: Chemosynthetic ecosystems · Mollusc · Virus · Pathogenicity · Community ecology · Parasite ecology · Endosymbiotic bacteria · Commensal polychaetes Resale or republication not permitted without written consent of the publisherDis Aquat Org 62: [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] 2004 ambient deep sea (see Van Dover 2000). Deep-sea seeps are located primarily on continental margins where reduced compounds diffuse from the sea floor into the overlying water column. Seeps occur in a variety of settings (Sibuet & Olu 1998) and include petroleum seeps, which are common in the Gulf of Mexico (MacDonald et al. 1990), brine seeps found on the Florida Escarpment (Paull et al. 1984), and gas-hydrate seeps, including the methane-hydrate seep at Blake Ridge, off the coast of South Carolina (Van Dover et al. 2003). In contrast to hydrothermal vents, seeps are thought to be more stable, longer-lived ecosystems (Sibuet & Olu 1998). Ecological studies in these environments are still in their infancy and investigations of parasite burdens, pathology and disease in species living at seeps and vents are scarce.Bathymodiolin mussels (Mytilidae) are one of the dominant megafaunal taxa found at seeps and vents. Bathymodiolin mussels at vents typically live in water between 5 and 15°C (Van Dover 2000); mussels at seeps are generally present at ambient seawater temperatures (~2°C; Sibuet ...

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Histopathological lesions of Manila clam, Tapes philippinarum, from Hadong and Namhae coastal areas of Korea

Cited by 61 publications

References 16 publications

Marteiliosis in molluscs: A review

Marteiliosis in molluscs: A review

Hemocytes of the carpet shell clam (Ruditapes decussatus) and the Manila clam (Ruditapes philippinarum): Current knowledge and future prospects

Parasitism in species of Bathymodiolus (Bivalvia: Mytilidae) mussels from deep-sea seep and hydrothermal vents

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