Soft shell clams Mya arenaria with disseminated neoplasia demonstrate reverse transcriptase activity

Diseases of Aquatic Organisms
By: , and 



Disseminated neoplasia (DN), a proliferative cell disorder of the circulatory system of bivalves, was first reported in oysters in 1969. Since that time, the disease has been determined to be transmissible through water-borne exposure, but the etiological agent has not been unequivocally identified. In order to determine if a viral agent, possibly a retrovirus, could be the causative agent of DN, transmission experiments were performed, using both a cell-free filtrate and a sucrose gradient-purified preparation of a cell-free filtrate of DN positive materials. Additionally, a PCR-enhanced reverse transcriptase assay was used to determine if reverse transcriptase was present in tissues or hemolymph from DN positive soft shell clams Mya arenaria. DN was transmitted to healthy clams by injection with whole DN cells, but not with cell-free flitrates prepared from either tissues from DN positive clams, or DN cells. The cell-free preparations from DN-positive tissues and hemolymph having high levels of DN cells in circulation exhibited positive reactions in the PCR-enhanced reverse transcriptase assay. Cell-free preparations of hemolymph from clams having low levels of DN (<0.1% of cells abnormal), hemocytes from normal soft shell clams, and normal soft shell clam tissues did not produce a positive reaction in the PCR enhanced reverse transcriptase assay.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Soft shell clams Mya arenaria with disseminated neoplasia demonstrate reverse transcriptase activity
Series title Diseases of Aquatic Organisms
Volume 34
Issue 3
Year Published 1998
Language English
Publisher Inter-Research
Description p.187-192
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Diseases of Aquatic Organisms
First page 187
Last page 192
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