Journal
MARINE POLLUTION BULLETIN
Volume 50, Issue 11, Pages 1335-1339Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2005.04.042
Keywords
disseminated neoplasia; hemic neoplasia; leukemia; mussels; Mytilus galloprovincialis; Black Sea
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Disseminated neoplasia, also called leukemia or hemic neoplasia, has been detected in 15 species of marine bivalve mollusks worldwide. The disease is characterized by the presence of single anaplastic cells with enlarged nuclei and sometimes frequent mitosis, in hemolyinph vessels and sinuses. The neoplastic cells gradually replace normal hemocytes leading to the increased mortality of animals. The neoplasia reaches epizootic prevalences in blue mussels, Mytilus trossuhis, in some areas, whereas prevalences in Mytilus edulis are generally very low. Mytilus galloprovincialis was Suggested to be resistant to the disease although very low prevalences were documented from Spain in the Atlantic Ocean and Italy in the Mediterranean Sea. A case of disseminated neoplasia was discovered in M. galloprovincialis from among 200 specimens studied from the coast of the Romanian Black Sea. Histological preparation revealed the presence of large anaplastic cells with lobed nuclei. This observation extends the geographic range of marine bivalve Mollusks with disseminated neoplasia to include the Black Sea. (c) 2005 Elsevier Ltd. All rights reserved.
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