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  • 1
    Electronic Resource
    Electronic Resource
    Ultrastructural Studies of the Zygote and Oocyst Wall Formation of Eimeria truncata of the Lesser Snow Goose (1986)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 33 (1986), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: . Zygote development and oocyst wall formation of Eimeria truncata occurred in epithelial cells in renal tubules and ducts of experimentally infected lesser snow geese (Anser c. caerulescens). Post-fertilization stages were present throughout the kidneys beginning nine days post-inoculation. Initially, a single plasmalemma enclosed the zygote, and type 1 wall-forming bodies (WF1) became labyrinthine and moved toward the surface. There, WF1 degranulated and formed the outer layer of the oocyst wall between the plasmalemma and a newly formed second subpellicular membrane. Several WF2 fused and formed the inner layer, of the oocyst wall between the third and fourth subpellicular membranes. Six subpellicular membranes were observed during wall formation. Other features of oocyst development were similar to those of other eimerian species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1986.tb05621.x
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  • 2
    Electronic Resource
    Electronic Resource
    Ultrastructural Studies of Microgametogenesis and Macrogametogenesis of Eimeria truncata of the Lesser Snow Goose (1986)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 33 (1986), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: . Microgamonts and macrogamonts of Eimeria truncata were observed in renal epithelial cells of collecting tubules and ducts and occasionally in macrophages of experimentally infected lesser snow geese (Anser c. caerulescens) beginning 8.5 days post inoculation. Intraparasitophorous vesicles in parasitophorous vacuoles of both types of gamonts appeared to originate in host cell cytoplasm and enter gamonts through micropores by budding of plasmalemma or by pinocytosis. Within the parasite's cytoplasm, the vesicles were broken down in Golgi-associated vacuoles. The surfaces of microgamonts were highly invaginated to facilitate extrusion of numerous microgametes. Formation and maturation of microgametes were similar to those of other eimerian species. Each microgamete had two flagella, a mitochondrion, and a peculiarly shaped electron-dense nucleus that was oval anteriorly in cross section and somewhat dumbbell-shaped posteriorly. A longitudinally arranged inner membrane complex lay between a portion of the mitochondrion and the plasmalemma. About five subpellicular microtubules extended the length of the microgamete body. Macrogametogony differed little from that described in other eimerian species. Type 1 wall-forming bodies (WFB) formed in Golgi complexes early in macrogametogony, and type 2 WFB formed in cisternae of endoplasmic reticulum in intermediate stages of macrogamont development.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1986.tb05622.x
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  • 3
    Electronic Resource
    Electronic Resource
    Host specificity studies and oocyst description of aCryptosporidium sp. isolated from ostriches (1994)
    Springer
    Parasitology research 80 (1994), S. 316-319 
    Details
    ISSN: 1432-1955
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Oocysts of aCryptosporidium sp. were found in the feces of 14 of 165 (8.5%) ostriches imported into Canada. The genus identity of the oocysts was confirmed by morphology. The mean (±SD) size of 40 oocysts was 4.6 (0.53)×4.0 (0.42) μm (range 3.9–6.1×3.3–5.0 μm) with a shape index (length/width ratio) of 1.15 (range 1.00–1.38). In cross-transmission experiments, thisCryptosporidium sp. failed to infect suckling mice, chickens, turkeys, or quail (Coturnix coturnix japonica). A comparison of oocyst structure and host susceptibility indicates that theCryptosporidium sp. from ostriches is different fromC. meleagridis, C. baileyi, andCryptosporidium sp. of bobwhite quail.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02351873
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