Myosporidium merluccius n. g., n. sp. Infecting Muscle of Commercial Hake (Merluccius sp.) from Fisheries near Namibia

. A new species of Microsporidia classified to a new genus was observed in the trunk muscle of commercial hake (Merluccius capensis/paradoxus complex) from Namibian fisheries. Macroscopic examination revealed thin and dark filaments inserted among muscle fibers. Inside the filaments were many sporop...

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Bibliographic Details
Published in:The Journal of eukaryotic microbiology 2005-11, Vol.52 (6), p.476-483
Main Authors: BAQUERO, ENRIQUE, RUBIO, MANUEL, MOURA, IACI N. S., PIENIAZEK, NORMAN J., JORDANA, RAFAEL
Format: Article
Language:English
Subjects:
16S rRNA
Animals
Biological and medical sciences
commercial fish parasite
DNA, Fungal - analysis
DNA, Ribosomal - analysis
Fish Diseases - microbiology
Fisheries
Fundamental and applied biological sciences. Psychology
Gadiformes - microbiology
Merluccius capensis
Microscopy, Electron, Transmission
Microsporidia, Unclassified - classification
Microsporidia, Unclassified - genetics
Microsporidia, Unclassified - isolation & purification
Microsporidia, Unclassified - ultrastructure
Microsporidiosis - veterinary
Microsporidium Prosopium
Molecular Sequence Data
molecular taxonomy
Muscles - microbiology
Mycological Typing Techniques
Myosporidium merluccius
Myosporidiummerluccius n. sp. n. g
Namibia
Phylogeny
Protozoa
RNA, Ribosomal, 16S - genetics
Sequence Analysis, DNA
spore morphology
Systematics. Geographical distribution. Morphology. Cytology
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Summary:. A new species of Microsporidia classified to a new genus was observed in the trunk muscle of commercial hake (Merluccius capensis/paradoxus complex) from Namibian fisheries. Macroscopic examination revealed thin and dark filaments inserted among muscle fibers. Inside the filaments were many sporophorous vesicles with about 30–50 spores per vesicle. The shape of the spore was pyriform and the extruded polar filament was of moderate length (up to 4.29 μm, n=12). This new species of Microsporidia is described using macrophotography, microphotography, staining, and transmission electron microscopy (TEM), as well as molecular methods. Its 16S rRNA was found to be similar to that of Microsporidium prosopium Kent et al., 1999, while both sequences were quite different from 16S rRNA sequences known for other Microsporidia. Nevertheless, this new species is separated morphologically from M. prosopium by the presence of 11–12 anisofilar coils and the formation of the xenoma at the site of infection. Type species
ISSN:1066-5234
1550-7408
DOI:10.1111/j.1550-7408.2005.00054.x