Publications

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review of myxosporea of importance in salmonid fisheries and aquaculture in british columbia.several myxosporean parasites are of importance in fisheries and aquaculture in british columbia. the pkx organism and ceratomyxa shasta noble, 1950 cause disease and mortality, kudoa thyrsites (gilchrist, 1924) and henneguya salminicola ward, 1919 are of importance because they infect somatic muscle, cause unsightly cysts and soft flesh, and thus reduce the market value of the fish. myxobolus arcticus pugachev et khokhlov, 1979, an apparently non-pathogenic species, along with h. salminicola, i ...19948050752
infection of aulorhynchus flavidus (gill) (osteichthyes: gasterosteiformes) by kudoa thyrsites (gilchrist) (myxosporea: multivalvulida).the myxosporean parasite kudoa thyrsites is reported from a new host, aulorhynchus flavidus, the tube-snout, collected near vancouver, british columbia, canada. prevalence reached 100% and intensity 1,535 pseudocysts per 2 cm length of fish. polymerase chain reaction primers specific for k. thyrsites amplified a fragment of the small subunit rdna and confirmed identification. these primers also allowed detection of k. thyrsites in young (< 4-mo-old) fish with no other apparent sign of infection. ...19979379282
development of kudoa thyrsites (myxozoa: myxosporea) in netpen-reared atlantic salmon determined by light microscopy and a polymerase chain reaction test.the intramuscular phase of development of kudoa thyrsites, the myxosporean associated with post-mortem myoliquefaction, or 'soft flesh syndrome', is described using histological preparations of the musculature of seawater netpen-reared atlantic salmon salmo salar. hatchery-reared atlantic salmon were naturally exposed to the infective stage while held in the experimental seawater netpens of the pacific biological station in nanaimo, british columbia, canada. in fish exposed during the summer of ...199910546048
phylogeography of the cosmopolitan marine parasite kudoa thyrsites (myxozoa: myxosporea).kudoa thyrsites (myxozoa: multivalvulida) is a cosmopolitan marine parasite of fishes associated with post-mortem tissue degradation. financial losses incurred as a result of these infections are of concern to commercial fisheries. there is conflicting evidence whether k. thyrsites represents a cryptic species complex. myxospore morphology is very similar for k. thyrsites across its range, but preliminary genetic analyses show some differences. kudoa thyrsites and the morphologically similar kud ...200616968454
heart and skeletal muscle inflammation (hsmi) disease diagnosed on a british columbia salmon farm through a longitudinal farm study.heart and skeletal muscle inflammation (hsmi) is an emerging disease of marine-farmed atlantic salmon (salmo salar), first recognized in 1999 in norway, and later also reported in scotland and chile. we undertook a longitudinal study involving health evaluation over an entire marine production cycle on one salmon farm in british columbia (canada). in previous production cycles at this farm site and others in the vicinity, cardiac lesions not linked to a specific infectious agent or disease were ...201728225783
long-term epidemiological survey of kudoa thyrsites (myxozoa) in atlantic salmon (salmo salar l.) from commercial aquaculture farms.kudoa thyrsites (myxozoa) encysts within myocytes of a variety of fishes. while infected fish appear unharmed, parasite-derived enzymes degrade the flesh post-mortem. in regions of british columbia (bc), canada, up to 4-7% of fillets can be affected, thus having economic consequences and impacting the competitiveness of bc's farms. k. thyrsites was monitored in two farms having high (hp) or low (lp) historical infection prevalence. at each farm, 30 fish were sampled monthly for blood and muscle ...201626661293
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