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A new shell disease in the mud crab Scylla serrata from Port Curtis, Queensland (Australia)

Andersen, L. E., Norton, J.H. and Levy, N. H. (2000) A new shell disease in the mud crab Scylla serrata from Port Curtis, Queensland (Australia). Diseases of Aquatic Organisms, 43 . pp. 233-239. ISSN 0177-5103


Article Link: http://www.int-res.com/articles/dao/43/d043p233.pd...


In 1994 a previously unreported rust spot shell disease was seen in mud crabs Scylla serrata-Forskal from Port Curtis, central Queensland, Australia. Of 673 crabs surveyed, 21.7% had shell lesions. Of these, 82.9% had rust spot lesions on the carapace. The majority of rust spot-affected crabs (78.8%) were female. Rust spot lesions were predominantly non-perforated (89.4%) and 54.8% were bilaterally symmetrical. There was also a gender difference in the areas of the carapace most commonly affected. The main histological features of the rust spot lesion included: a cavity in the upper endocuticle; indentation of the endocuticle below the cavity; remains of muscle attachment adhesive epithelium within the cavity; fibrous connective tissue between the damaged carapace and the attached muscle; and islands of endocuticle in this fibrous connective tissue. Histopathology of the internal organs failed to find evidence of an infectious or parasitic cause of the rust spot lesions. The cause(s) of the syndrome appear(s) to be non-infectious.

Item Type:Article
Corporate Creators:Department of Agriculture and Fisheries, Queensland
Subjects:Veterinary medicine > Other diseases and conditions
Aquaculture and Fisheries > Aquaculture
Live Archive:03 Jan 2024 00:52
Last Modified:03 Jan 2024 00:52

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