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  • 1
    Electronic Resource
    Electronic Resource
    Eimeria clethrionomyis sp. n., Eimeria gallatii sp. n., Eimeria pileata sp. n. and Eimeria marconii sp. n. from the Red-Backed Vole Clethrionomys gapperi Vigors, from Pennsylvania (1979)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 26 (1979), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS Four new eimerian species are described from red-backed voles. Clethrionomys gapperi in Pennsylvania. Sporulated oocysts of Eimeria clethrionomyis sp. n. are ellipsoidal, 18.8 (16.5–21.5) × 14.9 (14.0–16.5) with elongate, ovoid sporocysts, 10.6 (9.5–12.0) × 6.1 (5.5–7.0). The oocyst wall is smooth, with 2 layers, and thins, with terminal cap at one or both ends. Polar granules, dark Stieda body and sporocyst residuum are present. The occyst residuum is absent. Sporulated oocysts of Eimeria gallatii sp. n. are ellipsoidal, 27.7 (21–32) × 19.3 (17–24) with ovoid sporocysts, 13.5 (12–15) × 8.8 (8–10). The oocyst wall is smooth, 2-layered, with a micropyle and thin wall at the end opposite the micropyle. Polar granules. Stieda body and sporocyst residuum are present. The oocyst residuum is atypical, of cobwebby material. Sporulated oocysts of Eimeria pileata sp. n. are subspherical to spherical, 25.2 (20.5–29.5) × 22.5(19.5–25.5) with ellipsoidal sporocysts, 13.4(10.5–15.0) × 8.4 (7.5–9.5). The oocyst wall is rough, pitted, striated, 2-layered, with no micropyle. Polar granules, oocyst and sporocyst residuum. Stieda body and stiedal cap are present. Sporulated oocysts of Eimeria marconii sp. n. are ellipsoidal, 13.0 (10.5–15.0) × 10.6 (9.5–12.0) with elongate, ovoid sporocysts, 7.7 (7.0–8.5) × 4.2 (3.0–4.5). The oocyst wall is smooth, single-layered, with no micropyle. Polar granules, dark Stieda body and sporocyst residuum are present. There is no oocyst residuum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1979.tb04189.x
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  • 2
    Electronic Resource
    Electronic Resource
    Development of Eimeria ninakohlyakimovae from Sheep In Cell Cultures (1970)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 17 (1970), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. Monolayer cell line cultures of ovine trachea, thyroid, thymus, and kidney cells, as well as an established cell line (Madin-Darby) of bovine kidney cells, were inoculated with sporozoites of Eimeria ninakohlyakimovae and observed for a maximum of 24 days. Sporozoites were seen penetrating cells within 5 minutes after inoculation, as well as 2 and 3 days after inoculation, and leaving cells 3 days after inoculation. Transformation from sporozoites to trophozoites occurred by a widening or by a lateral outpocketing of the sporozoite body. Trophozoites and schizonts were first seen 3 days after inoculation in all ovine cell types. Large numbers of immature schizonts were observed, but only an estimated 0.4–4.3% of these became mature in the different kinds of cells. Usually, mature schizonts were first seen 10–11 days after inoculation in the ovine cells, but they sometimes occurred as early as 8 days. More mature schizonts were seen in the ovine kidney and trachea cells than in the others; the smallest number occurred in the bovine cells. The nucleoli of cells harboring large schizonts in each type of culture were enlarged and the chromatin clumps normally seen in the nuclei of non-infected cells were not visible. The cytoplasm of some infected cells was vacuolated. The formation of merozoites occurred by a budding process from blastophores, from the surface of schizonts, and/or from infoldings and invaginations of this surface. Merozoites were observed leaving host cells, but were not seen penetrating new cells. Intracellular first-generation merozoites were observed 13 and 15 days after inoculation in lamb trachea and kidney cells, respectively. No evidence of further development of such merozoites was found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1970.tb02382.x
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  • 3
    Electronic Resource
    Electronic Resource
    Fine structural aspects of early development of Eimeria ninakohlyakimovae in cultured cells (1972)
    Springer
    Parasitology research 38 (1972), S. 271-284 
    Details
    ISSN: 1432-1955
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Sporozoites, trophozoites, and early schizonts of Eimeria ninakohlyakimovae grown in cultured cells were examined with the electron microscope. Intracellular sporozoites had ultrastructural characteristics similar to those of extracellular sporozoites, except that apparently functional micropores were observed. During transformation of sporozoites to trophozoites, the conoid, annuli and subpellicular tubules, as well as some portions of the inner membrane complex of the pellicle, disappeared. Trophozoites and binucleate schizonts had a reduced number of micronemes and rhoptries. In schizonts with 3 nuclei, only a few remnants of the micronemes and rhoptries were seen and the inner membrane complex had almost completely disappeared. One such schizont had one or more centrioles associated with each nucleus; in one, an eccentric spindle with a dense, coneshaped structure at each pole was observed. A moderately dense, granular crescent body, probably derived from host cell material, was seen within the parasitophorous vacuole in some specimens.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00329274
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  • 4
    Electronic Resource
    Electronic Resource
    Development ofEimeria dispersa Tyzzer, 1929, from bobwhite quail (Colinis virginianus), in bovine kidney cell cultures (1979)
    Springer
    Parasitology research 59 (1979), S. 203-210 
    Details
    ISSN: 1432-1955
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The development ofEimeria dispersa Tyzzer, a parasite of bobwhite quail, in Madin-Darby bovine kidney cell cultures was investigated. Excysted sporozoites were inoculated into Leighton tubes containing cell monolayers on glass coverglasses and maintained in minimum essential medium supplemented with heat-inactivated fetal calf serum. Sporozoites became intracellular within 2 h. Sporozoite-shaped schizonts, schizonts with developing merozoites, and mature first-generation schizonts were seen 24 h postinoculation. Intracellular first-generation merozoites, second-generation trophozoites, and early second-generation schizonts containing two nuclei were first observed 72 h postinoculation. Second-generation schizonts containing developing merozoites as well as mature second-generation schizonts were first seen 96h postinoculation. Gametogony was not observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00927514
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  • 5
    Electronic Resource
    Electronic Resource
    Development in cell cultures of Eimeria vermiformis Ernst, Chobotar and Hammond, 1971 (1977)
    Springer
    Parasitology research 53 (1977), S. 23-29 
    Details
    ISSN: 1432-1955
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Development of Eimeria vermiformis from sporozoite to mature first-generation schizonts in cultured bovine kidney cells, Madin-Darby bovine kidney cells, and primary cultures of whole mouse embryos is described. Intracellular sporozoites were seen at 5 min, and for as long as 120 h after inoculation. Sporozoites were observed penetrating cells, with uninucleate trophozoites and immature schizonts with 2–6 nuclei first appearing 24 h after inoculation. Schizonts with 6 or more nuclei, as well as mature schizonts containing first-generation merozoites, were first seen between 36 and 48 h after inoculation of all 3 cell types used. The first indication of merozoite formation was determined by the appearance of small protuberances of cytoplasm at the periphery of schizonts. Merozoites began development at the periphery of schizonts and were later observed radiating from a central body of cytoplasm, 14–20 merozoites being formed. Some mature schizonts retained a small spherical residual body after merozoite formation was completed. After the rupture of schizonts, intracellular merozoites, which contained anterior and posterior refractile granules, were seen at 48, 72 and 96 h postinoculation. Merozoites were not seen entering or leaving cells. No further development was observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00383111
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