Nocardia sp. (Bacterial Disease) of Crayfish
On this page
Category
Category 3 (Host Not in Canada)
Common, generally accepted names of the organism or disease agent
Nocardiosis, Bacterial disease.
Scientific name or taxonomic affiliation
Nocardia sp.
Geographic distribution
United Kingdom.
Host species
Austropotamobius pallipes.
Impact on the host
Melanized nodules (2-3 mm) throughout tail musculature beneath a fracture in the exoskeleton. Abnormal behaviour.
Diagnostic techniques
Gross Observations
Examine musculature for nodules.
Histology
Transverse section reveals branched, Gram positive, acid fast Nocardia bacteria that also stain darkly with Grocott methenamine silver but are not evident with haematoxylin and eosin stain.
Methods of control
No known methods of treatment or control.
References
Alderman, D.J., Feist, S.W. and Polglase, J.L. 1986. Possible nocardiosis of crayfish Austropotamobius pallipes. Journal of Fish Diseases 9: 345-347.
Alderman, D.J. and J.L. Polglase. 1988. Pathogens, parasites and commensals. In: D.M. Holdrich and R.S. Lowery (eds.). Freshwater Crayfish: Biology, Management and Exploitation. Timber Press, OR., p. 168-171.
Citation Information
Bower, S.M., McGladdery, S.E., Price, I.M. (1994): Synopsis of Infectious Diseases and Parasites of Commercially Exploited Shellfish: Nocardia sp. (Bacterial Disease) of Crayfish.
Date last revised: Fall 1994
Comments to Susan Bower
- Date modified: