Taxonomy: Myxosporea
Animal: Myxobolus plectroplites 1 07.jpg
Myxobolus plectroplites in connective tissue in the musculature of the fresh water fish Plectroplites ambiguus in a section stained with PAS. Myxozoan spores were detected in faecal samples from 3 patients presenting with abdominal symptoms in SE Qld, Australia. All had eaten locally caught Yellow Belly fish (Plectroplites ambiguus) which were found to contain cysts of this parasite 40-350 microns long x 20-150 microns wide - seen here. They were bounded by thin membranous walls and contained numerous refractile spores identical in size, shape and appearance to those found in the faeces of the humans. They may be common in fish, with heavy infections affecting the taste of the fish as well as the health of the fish. The presence of spores were an incidental finding passing through the gut as in 2 of the patients, other enteric pathogens were present. (Boreham et al J Clin Microbiol. 1998. 36: 3728-3730 - see Bibliography)

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