desmozoon lepeophtherii n. gen., n. sp., (microsporidia: enterocytozoonidae) infecting the salmon louse lepeophtheirus salmonis (copepoda: caligidae).a microsporidian was previously reported to infect the crustacean parasite, lepeophtheirus salmonis (krøyer, 1837) (copepoda, caligidae), on farmed atlantic salmon (salmo salar l.) in scotland. the microsporidian was shown to be a novel species with a molecular phylogenetic relationship to nucleospora (enterocytozoonidae), but the original report did not assign it to a genus or species. further studies examined the development of the microsporidian in l. salmonis using electron microscopy and re ...200919943930
microbial and pathological findings in farmed atlantic salmon salmo salar with proliferative gill inflammation.proliferative gill inflammation (pgi) is an important cause of loss in seawater-farmed atlantic salmon in norway. several microbes have been associated with pgi, including the commonly but not exclusively observed inclusions (epitheliocysts) within the gill lamellae related to infection with 'candidatus piscichlamydia salmonis'. atlantic salmon transferred in the spring of 2004 to 12 seawater farms situated in mid- and southwest norway were sampled throughout that year. outbreaks of pgi, as eval ...201021133320
original observations of desmozoon lepeophtherii, a microsporidian hyperparasite infecting the salmon louse lepeophtheirus salmonis, and its subsequent detection by other researchers.abstract: a microsporidian hyperparasite, desmozoon lepeophtherii, of the parasitic copepod lepeophtheirus salmonis (salmon louse), infecting farmed atlantic salmon (salmo salar), was first discovered in the west of scotland in 2000. heavily infected salmon lice are easily recognised as they have large opaque inclusions distributed throughout the body. the prevalence of salmon lice with visible signs of microsporidiosis can be up to 10% of the population from certain farm sites. the microsporidi ...201122166354
gill pathology in scottish farmed atlantic salmon, salmo salar l., associated with the microsporidian desmozoon lepeophtherii freeman et sommerville, 2009.gill disorders have emerged in recent years as a significant problem in the production of marine-stage atlantic salmon salmo salar l. the multi-aetiological condition 'proliferative gill inflammation' (pgi) has been reported to cause heavy losses in western norway, yet reports of scottish cases of the disease have remained anecdotal. in the present study, histopathological material from a marine production site in the scottish highlands experiencing mortalities due to a seasonal gill disease wit ...201323444900
the diversity of microsporidia in parasitic copepods (caligidae: siphonostomatoida) in the northeast pacific ocean with description of facilispora margolisi n. g., n. sp. and a new family facilisporidae n. fam.three distinct microsporidia were identified from parasitic copepods in the northeast pacific ocean. sequencing and phylogenetic analysis of a partial small subunit ribosomal rna gene (ssu rdna) sequence identified a genetically distinct variety of desmozoon lepeophtherii from lepeophtheirus salmonis on cultured atlantic salmon salmo salar, and this was confirmed by transmission electron microscopy. phylogenetic analysis resolved the ssu rdna sequence of the second organism in a unique lineage t ...201222452386
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