Elucidating the life cycle of Marteilia sydneyi, the aetiological agent of QX disease in the Sydney rock oyster (Saccostrea glomerata)

International Journal for Parasitology
Robert D Adlard, Matthew J Nolan

Abstract

Marteilia sydneyi (Phylum Paramyxea, Class Marteiliidea, Order Marteiliida) (the causative agent of QX disease) is recognised as the most severe parasite to infect Saccostrea glomerata, the Sydney rock oyster, on the east coast of Australia. Despite its potential impact on industry (>95% mortality), research towards lessening these effects has been hindered by the lack of an experimental laboratory model of infection as a consequence of our incomplete understanding of the life cycle of this parasite. Here, we explored the presence of this parasite in hosts other than a bivalve mollusc from two study sites on the Hawkesbury River, New South Wales, Australia. We employed PCR-based in situ hybridisation and sequence analysis of a portion of the first internal transcribed spacer of rDNA in an attempt to detect M. sydneyi DNA in 21 species of polychaete worm. Marteilia DNA was detected in 6% of 1247 samples examined by PCR; the analysis of all amplicons defined one distinct sequence type for first internal transcribed spacer, representing M. sydneyi. Of the polychaete operational taxonomic units test-positive in PCR, we examined 116 samples via in situ hybridisation DNA probe staining and identified M. sydneyi DNA in the epithelium ...Continue Reading

References

Dec 29, 1999·Marine Biotechnology· Le Roux FF Berthe
Apr 27, 2000·Diseases of Aquatic Organisms·S N Kleeman, R D Adlard
Feb 13, 2001·Journal of Experimental Marine Biology and Ecology·C AudemardF C.J. Berthe
Feb 16, 2010·Journal of Invertebrate Pathology·Rhiannon P KuchelDavid A Raftos

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Citations

Feb 18, 2016·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Ximing Guo, Susan E Ford
Oct 5, 2015·Trends in Parasitology·David BassHanna Hartikainen
Mar 24, 2020·Journal of Invertebrate Pathology·Susana DarribaMaría J Carballal

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