Scallop Protistan G

Category

Category 2 (In Canada and of Regional Concern)

Common, generally accepted names of the organism or disease agent

SPG, Scallop protistan with ghosty appearance.

Scientific name or taxonomic affiliation

Unidentified protistan, possibly an amoeba.

Geographic distribution

British Columbia. Also in brood stock imported by Ireland from Japan.

Host species

Patinopecten yessoensis.

Impact on the host

Infections usually light and associated with acute but focal inflammation that ulcerates when located close to the epithelium of the gut, gonadal duct, gill, or mantle.

Diagnostic techniques

Histology: A few ghosty looking protista (about 10-15 µm in diameter) within focal haemocyte aggregations.

Methods of control

No known methods of prevention or control.

References

Bower, S.M., J. Blackbourn, D.J.H. Nishimura and G.R. Meyer. 1990. Diseases of cultured Japanese scallops (Patinopecten yessoensis) in British Columbia, Canada. In: A. Figueras (ed.). Abstracts, Fourth International Colloquium on Pathology in Marine Aquaculture. 17­21 September 1990, Vigo (Pontevedra), Spain, Instituto de Investigaciones Marinas-CSIC, Vigo, p. 67-68.

Bower, S.M., J. Blackbourn, G.R. Meyer and D.J.H. Nishimura. 1992. Diseases of cultured Japanese scallops (Patinopecten yessoensis) in British Columbia, Canada. Aquaculture 107: 201-210.

Citation Information

Bower, S.M., McGladdery, S.E., Price, I.M. (1994): Synopsis of Infectious Diseases and Parasites of Commercially Exploited Shellfish: Scallop Protistan G.

Date last revised: Fall 1994
Comments to Susan Bower

Date modified: