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  • 1985-1989  (4)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Notes on kidney-infecting species of the genus Sphaerospora Thélohan (Myxosporea), including a new species S. gobionis sp.nov., and on myxosporean life cycle stages in the blood of some freshwater fish (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish diseases 8 (1985), S. 0 
    Details
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Abstract Freshwater fish in Czechoslovakia were examined for species of the genus Sphaerospora Thélohan, 1892 and for myxosporean life cycle stages in the blood. In addition to perch infected with S. pectinacea Bocharova & Donets, 1974, renal tubules of seven host species harboured thus far unidentified Sphaerospora species. A new species, S. gobionis sp.nov. is described from renal tubules of Gobio gobio. In populations of Gobio gobio, Tinea tinea and Rutilus rutilus harbouring infections with different Sphaerospora species, organisms identified as mobile myxosporean life cycle stages were detected in the blood, where they undergo a proliferative cycle. These organisms were reminiscent of stages in the blood of common carp fingerlings, supposedly identical with Sphaerospora renicola Dyková & Lorn. It is possible that the blood stages found in the three cyprinid hosts represent stages of the life cycle of their respective Sphaerospora species. If this is correct, further studies may show if the presence of proliferative stages in the bloodstream is a character distinctive of the genus Sphaerospora.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2761.1985.tb01217.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Species of the genus Chloromyxum Mingazzini (Myxozoa: Myxosporea) infecting burbot (Lota lota L.) (1988)
    Springer
    Systematic parasitology 11 (1988), S. 231-237 
    Details
    ISSN: 1573-5192
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Three different species of the genus Chloromyxum Mingazzini were found in burbot (Lota lota L.) collected in south-west Bohemia (Czechoslovakia). Comparison with existing records revealed that one species could be identified as C. pseudomucronatum Kashkovskiy, 1966. Found in the urinary bladder, it had subspherical spores with fine surface ridges and polysporic plasmodia. The two other myxosporea were established as new species: C. lenorae n. sp. was found in the kidney, renal corpuscles, renal tubules and interstitium, and had ellipsoid spores with surface ridges barely perceptible in the light microscope but clearly revealed by transmission electron microscopy. In the polysporic plasmodia, spores developed in pansporoblasts. C. reticulatum n. sp. was found in the gall bladder. It had polysporic plasmodia and spherical spores (average size 8.1 μm in diameter) with a unique surface structures: elevated crests marking off irregular fields which appeared as a reticulum. In five of the fish infected with C. lenorae, bloodstream myxosporean stages of an extrasporogonic cycle were found. Further research is needed to determine whether they are stages of Sphaerospora cristata Shulman, 1962, a species also found in two of the burbot examined, or stages belonging to the Chloromyxum life cycle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00010004
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Haemogregarina vltavensis n. sp. from perch (Perca fluviatilis) in Czechoslovakia (1989)
    Springer
    Systematic parasitology 13 (1989), S. 193-196 
    Details
    ISSN: 1573-5192
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract A new species, Haemogregarina vltavensis n. sp., is described from the blood of perch (Perca fluviatilis) in southwestern Czechoslovakia. Both intra-erythrocytic and free stages interpreted as gametocytes were detected. Only one parasite per erythrocyte was found. It displaces the nucleus and fills most of the volume of the infected host cell. No other developmental stages were discovered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00009744
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  • 4
    Electronic Resource
    Electronic Resource
    Sporogenesis and spore structure in Kudoa lunata (Myxosporea, Multivalvulida) (1988)
    Springer
    Parasitology research 74 (1988), S. 521-530 
    Details
    ISSN: 1432-1955
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The multivalvulid myxosporean Kudoa lunata Lom, Dyková and Lhotáková, 1983 forms large polysporic trophozoites within the myocytes of scaldfish, Arnoglossus imperialis and A. laterna. The spores arise by the division of generative cells that produce a number of sporogonic cells necessary to complete a sporoblast. The development of some of the sporogonic cells can take place in isolation from other sporoblast cells, as shown by aberrant cases of polar capsule formation. Pansporoblast formation does not exist in Kudoa, at variance with large polysporic trophozoites of other myxosporean genera. The genus Kudoa also includes species with small trophozoites producing just one or two spores without pansporoblasts, as in Sphaerospora. Perhaps this type of sporogenesis was preserved in the species of Kudoa that have large trophozoites. Kudoa spores have a unique type of sporoplasm, comprising an outer cell enveloping an inner one; these differ in their contents of ribosomes and glycogen granules. This type of sporoplasm is reminiscent of the basic unit of all types of myxosporean development, i.e., the primary (vegetative) cell enclosing an inner (generative) cell. The canals for filament discharge extend through the apical spore projections and are of a length unmatched in other myxosporea.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00531629
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    Paper (German National Licenses)
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