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  • 1
    Electronic Resource
    Electronic Resource
    Renal sphaerosporosis in the common carp Cypnnus carpio L. (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish diseases 3 (1980), S. 0 
    Details
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Abstract. Sphaerospora angulata Fujita, 1912, has been identified as a frequent renal parasite of cultured carp populations in Hungary. Its prevalence ranged from 10 to 50% in the pond farms surveyed. The youngest carp infected were 21/2–3 months old. Infections were not common in one-summer fish and tended to become less frequent with increasing age of the host.The developing stages of S. angulata are found in the contorted tubules of the trunk-kidney but never invade the parenchymal tissue of the trunk or head-kidneys. The pansporoblasts developing in the wide proximal segment of the renal tubules, and the spores arising from the pansporoblasts are typically coelozoic parasites, for they apparently do not damage the tubular lining epithelium, nor its brush border. The main adverse effect of S. angulata is probably depression of resistance owing partly to deprivation of the host of nutrients secreted by the glomeruli and partly to mechanical obstruction of the distal tubular segments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2761.1980.tb00179.x
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  • 2
    Electronic Resource
    Electronic Resource
    Complete developmental cycle of Myxobolus pseudodispar (Gorbunova) (Myxosporea: Myxobolidae) (2001)
    Oxford UK : Blackwell Science Ltd
    Journal of fish diseases 24 (2001), S. 0 
    Details
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Myxobolus pseudodispar (Gorbunova) is a common parasite of the muscle of roach, Rutilus rutilus L., whereas its actinosporean development occurs in two oligochaete alternate hosts. This paper reports the complete developmental cycle of this parasite in the oligochaete alternate host Tubifex tubifex and the roach. In laboratory experiments, parasite-free T. tubifex specimens were infected by myxospores of M. pseudodispar collected from roach in Lake Balaton. Parasite-free roach fingerlings were infected with floating triactinospores (TAMs) released from oligochaetes on day 69 after challenge. Young plasmodia and spores in roach were first recorded on day 80 post-exposure (p.e.). Myxospores collected from experimentally infected roach initiated a new development in T. tubifex and the resulting TAMs infected roach. No infection of roach resulted from feeding oligochaetes containing mature triactinospores.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2761.2001.00324.x
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  • 3
    Electronic Resource
    Electronic Resource
    Presporogonic development of Sphaerospora renicola Dyková & Lorn, 1982, in the swimbladder of the common carp, Cyprinus carpio L. (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish diseases 11 (1988), S. 0 
    Details
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Abstract. The prcsporogonic developmental stages of Sphaerospora renicola, the causative agent of swimbladder inflammation (SBI), develop in the swimbladder of common carp by multiple internal cleavage. The earliest development stage is the secondary cell enclosed by the primary cell. The secondary cells undergo multiple amitotic division within the mother cell and the dividing forms are connected by narrow cytoplasmic bridges. As a result of further internal cleavage, two tertiary cells appear in each secondary cell. The triple formation enclosing a secondary and two tertiary cells is identical with the pansporoblast containing two sporoblasts which occurs in the renal tubules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2761.1988.tb00748.x
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  • 4
    Electronic Resource
    Electronic Resource
    Experimental identification of the actinosporean stage of Sphaerospora renicola Dykova & Lom 1982 (Myxosporea: Sphaerosporidae) in oligochaete alternate hosts (1999)
    Oxford, UK : Blackwell Science, Ltd
    Journal of fish diseases 22 (1999), S. 0 
    Details
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: The extrapiscine development of Sphaerospora renicola, a myxosporean parasite of the kidney of common carp, Cyprinus carpio L., was studied in the experimentally infected oligochaetes Tubifex tubifex (Müller) and Branchiura sowerbyi (Beddard). After the infection of these tubificids with homogenized common carp kidneys containing myxospores of S. renicola, the development of actinosporean stages was first observed under light microscopy 8 days after infection in pathogen-free T. tubifex. Infection of B. sowerbyi with mature actinosporean stages was first observed 91 days after infection. At that stage of development, pansporocysts containing neoactinospores filled the intestinal epithelium of the worm. Ninety-five days after infection, pansporocysts containing actinospores and free actinospores were found in the gut lumen of B. sowerbyi. Actinospores of S. renicola emerged from B. sowerbyi after 98 days of intraoligochaete development. These were floating in the water and showed the typical form of neoactinospores. The shape of the spores was triangular in apical view and elliptical in lateral view. The prevalence of infection reached 37%. Control specimens of B. sowerbyi proved to be free of neoactinospores. Except for a single specimen of B. sowerbyi, the only early developmental stages (pansporocysts) were found in T. tubifex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2761.1999.00150.x
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  • 5
    Electronic Resource
    Electronic Resource
    Light and electron microscopic studies on Epieimeria anguillae (Léger & Hollande, 1922), a coccidium parasitizing the European eel, Anguilla anguilla L. (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish diseases 9 (1986), S. 0 
    Details
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Abstract. The foregut of eels naturally infected by Epieimeria anguillae (Léger & Hollande, 1922) was studied by light and electron microscopy. It has been established that this parasite, which develops in a characteristic location on the surface of epithelial cells, and was classified on this basis by Dyková & Lom (1981) as a member of the genus Epieimeria, undergoes intracellular merogony and gamogony similarly to other eimerians; however, its sporogony takes place outside the fish or intercellularly. The trophozoites and merogonic and gamogonic stages each develop in a para-sitophorous vacuole which is half embedded in the epithelial cell and protrudes into the intestinal lumen. The parasitophorous vacuote is surrounded by a single membrane; however, towards the intestinal lumen it is covered also by the cell membrane. In its location, Epieimeria anguillae resembles cryptosporidia, but differs from the latter significantly in its relationship with the host cell.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2761.1986.tb00988.x
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  • 6
    Electronic Resource
    Electronic Resource
    A light and electron microscopic study of the agent of carp mucophilosis (1981)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish diseases 4 (1981), S. 0 
    Details
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Abstract. The authors failed to detect algae or fungi in the gills of carp showing the typical clinical signs of mucophilosis. Electron microscopic examination showed the presence of rickettsia- or chlamydia-like organisms, inside the characteristic mucophilus cysts. These organisms are believed to be the causative agents of mucophilosis. The organisms develop intracellularly in the gill epithelium and after several divisions give rise to mucophilus cysts 70–80 μm in diameter. The morphological and ultrastructural changes observed in the course of mucophilosis bear a striking resemblance to the cysts and cyst-inducing causative agents responsible for epitheliocystis disease.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2761.1981.tb01140.x
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  • 7
    Electronic Resource
    Electronic Resource
    Development of Myxobolus bramae (Myxosporea: Myxobolidae) in an oligochaete alternate host, Tubifex tubifex (2000)
    Oxford, UK : Blackwell Science Ltd
    Journal of fish diseases 23 (2000), S. 0 
    Details
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: The development of Myxobolus bramae Reuss 1906, a myxosporean parasite of the gills of common bream Abramis brama L., was studied in experimentally infected oligochaetes. In five experiments, uninfected Tubifex tubifex (Müller) and Limnodrilus hoffmeisteri Claparéde were exposed to mature myxospores of M. bramae. In four experiments triactinomyxon type actinospores developed in Tubifex specimens but no infection was found in Limnodrilus. Actinospores were released from oligochaetes 70–81 days after initial exposure. At that time pansporocysts containing eight actinospores were located in the gut epithelium of experimental oligochaetes, but free actinosporean stages were also found in their gut lumen. Each actinospore had three pyriform polar capsules and a barrel-shaped sporoplasm with 32 secondary cells. The spore body joined the three caudal projections with a stout style. The total length of the actinospore was 139 μm on the average.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2761.2000.00202.x
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  • 8
    Electronic Resource
    Electronic Resource
    Inhibition of autophagic sequestration and endogenous protein degradation in isolated rat hepatocytes by methylated adenosine derivatives
    Amsterdam : Elsevier
    FEBS Letters 134 (1981), S. 194-196 
    Details
    ISSN: 0014-5793
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0014-5793(81)80600-X
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  • 9
    Electronic Resource
    Electronic Resource
    Liquid-phase metal vapor chemistry: rotary reactors and electron-beam evaporation sources (1990)
    s.l. : American Chemical Society
    Inorganic chemistry 29 (1990), S. 1068-1073 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic00330a032
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  • 10
    Electronic Resource
    Electronic Resource
    Subbiological aspects of ageing and the concept of biological cathode protection
    Amsterdam : Elsevier
    Mechanisms of Ageing and Development 1 (1972), S. 319-326 
    Details
    ISSN: 0047-6374
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0047-6374(72)90077-2
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