A viral disease associated with mortalities in hatchery-reared postlarvae of the giant freshwater prawn Macrobrachium rosenbergii

Diseases of Aquatic Organisms

François Herman¹  Jean-Robert Bonami¹  Rita M. Redman¹  Donald V. Lightner¹  Jean-Michel Arcier¹  Jocelyne Mari¹ 

关键词: Viral disease;    Freshwater prawn;    Crustacean;    Macrobrachium rosenbergii;   

DOI  :  10.3354/dao038177

学科分类：生物科学（综合）

来源: Inter-Research

【 摘 要 】

ABSTRACT: During mortality outbreaks in hatchery-reared Macrobrachium rosenbergii postlarvae (PL) in Guadeloupe Island (French West Indies) during 1997, an associated viral disease was discovered and the agent was subsequently isolated. Theclinical signs presented by severely affected PL consisted essentially of an opaque whitish appearance of the abdomen. Histopathological changes in affected PL were characterized predominantly by pale to darkly basophilic, often reticulated, cytoplasmicinclusions in the connective tissue cells of most organs and tissues. The isolated virus was approximately 30 nm in diameter as observed with an electron microscope by negative staining. By its location, structure and size it could be related to differentfamilies of the small RNA cytoplasmic viruses such as the Picornaviridae or the Nodaviridae. Its characterization is in progress.

【 授权许可】

Unknown