Flagellates Associated with Abalone
Category 4 (Negligible Regulatory Significance in Canada)
Common, generally accepted names of the organism or disease agent
Flagellates of abalone, Cryptobia infection
Scientific name or taxonomic affiliation
Cryptobia sp. and possibly Cryptobia abalonesis (nomen nudum) (see Chen et al. 2004).
Coast of the south China Sea.
Impact on the host
Detected in the blood of abalone from farmed populations in Shanwei, Guangdong Province.
Smears: Haemolymph from the heart smeared on glass slides, fixed in mathanol and stained with Giemsa's stain revealed spindle shaped Cryptobia sp (12.5 ± 1,88 µm long and 2.5 ± 0.85 µm wide) with: an ellipsoidal nucleus (1.81 ± 0.61 µm in length and 1.22 ± 0.33 µm in width) situated at 20% to 25% of the body length from the anterior end, a tiny spherical kinetoplast located anterior to the nucleus, a short anterior flagellum (8.85 ± 1.23 µm), and longer posterior flagellum (15.38 ± 2.46 µm).
Methods of control
Methods of prevention and control are unknown.
Chen, B., L. Xu, Z. Guo and H. Yang. 2004. A new species of Cryptobia sp. n. (Kinetoplastida, Bodinina, Bodonidae) found in the blood of the farmed abalone, Haliotis diversicolor Reeve. Journal of Shellfish Research 23: 1169-1171.
Bower, S.M. (2007): Synopsis of Infectious Diseases and Parasites of Commercially Exploited Shellfish: Flagellates Associated with Abalone.
Date last revised: November 2007
Comments to Susan Bower
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