Differential in vivo response of soft-shell clam ...

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Title Differential in vivo response of soft-shell clam hemocytes against two strains of Vibrio splendidus: changes in cell structure, numbers and adherence
Author(s) D. R. Mateo, A. Siah, M. T. Araya, F. C. Berthe, G. R. Johnson, S. J. Greenwood
Journal Journal of Invertebrate Pathology
Date 2009
Volume 102
Issue 1
Start page 50
End page 56
Abstract Host-pathogen interaction models in aquatic species are useful tools for understanding the pathogenicity of diseases in cultured and wild populations. In this study we report the differential in vivo response of soft-shell clam (Mya arenaria) hemocytes against two strains of Vibrio splendidus. Responses were measured 24h after injecting into the posterior adductor muscle either an endemic wild-type strain (7SHRW) or a strain associated with oyster mortalities (LGP32-GFP). Changes in hemocyte structure (percentage of rounded cells) were assessed microscopically. Changes in adherence and hemocyte numbers were analyzed by flow-cytometric cell counting. Increased percentages of rounded cells were found in response to both strains. However, values from the group infected with LGP32-GFP were significantly higher (p<0.01) than with 7SHRW. The cell adherence was markedly diminished (p<0.001) by LGP32-GFP whereas 7SHRW did not change it significantly. Increased numbers of hemocytes (p<0.001) were induced by LGP32-GFP, while no significant changes were found after infection with 7SHRW. These results show the regulatory capacity of soft-shell clams hemocytes to perform specific responses against different strains of V. splendidus.
DOI 10.1016/j.jip.2009.06.008
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