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  • 1
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    Resistance to the Chemical Sterilant, Apholate, in Aedes aegypti (1964)
    American Association for the Advancement of Science
    Details
    Publication Date: 1964-07-31
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science
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  • 2
    Electronic Resource
    Electronic Resource
    Two New Species of Nosema (Microsporida: Nosematidae) from the Mexican Bean Beetle Epilachna varivestis (Coleoptera: Coccinellidae), (1985)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 32 (1985), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Two new species of the genus Nosema (Microsporida: Nosematidae) are described from the Mexican bean beetle, Epilachna varivestis (Coleoptera: Coccinellidae) and their life cycle stages studied by light and electron microscopy. Both species are monomorphic and disporous: they develop in direct contact with the cytoplasm of host cells and the nuclei of all stages are diplokaryotic. The more virulent species produces systemic infections most extensively in the adipose tissue, muscles, and Malpighian tubules of larvae and also invades the reproductive tissues of adult beetles. During merogonic development, it forms chains of diplokaryotic meronts. The fine structure of the sporoblast nuclei shows clumped material in the pole of each nucleus opposite their common plane of apposition. Spores are straight to slightly curved and ovocylindrical in shape and they measure 5.3 ± 0.13 × 2.1 ± 0.03 μm. The less virulent species also invades most host tissues but does not develop in the midgut epithelium; the Malpighian tubules are the principal site of its development and it also invades the ovaries and testes of adult beetles. Merogony occurs exclusively as the result of binary fission of diplokaryotic meronts. The plasmalemma of the meronts is covered with a thin deposit of exospore material upon which are located closely packed tubules that encircle the body transversely. A thickened deposit of exospore material on the surface of the diplokaryotic sporonts later obscures these tubules. Other tubules occur free in the host cell cytoplasm or attached to the plasmalemma of meronts and sporonts. Secretory granules also occur free or in chains in the host cytoplasm and are probably produced from the surface of the sporoblasts. Sporoblasts also contain an unusual cup-shaped organelle associated with a dense body, which is apparently involved in the formation of the polar tube and its associated organelles in the anterior part of the spore. Spores are ellipsoidal to slightly pyriform and measure 4.7 ± 0.06 × 2.6 ± 0.03 μm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1985.tb04056.x
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  • 3
    Electronic Resource
    Electronic Resource
    Ultrastructure and Description of a New Species of Telomyxa (Microspora: Telomyxidae) from the Semiaquatic Beetle, Ora texana Champ. (Coleoptera: Helodidae) (1985)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 32 (1985), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: A new species of the uncommon microsporidian genus Telomyxa (Microspora: Telomyxidae) has been found parasitizing the larval fat body of the semiaquatic beetle, Ora texana. In this species, the sporogonic sequence results in the formation of sporocysts measuring 7.7 times 6.5 μm that contain two crested uninucleate spores (averaging 5.7 times 2.2 μm). The spores are essentially oblong/ovate, tapering toward the anterior end and remaining bound together after sporogony by a persistent accessory membrane or sporocyst. The two spores in the sporocyst are produced by an unusual morphogenetic sequence in which, after one mitosis, the binucleate sporont elongates, forming two lobes that fold toward one another and cleave along a central plane, forming two parallel sporoblasts. The general ultrastructural features of this process are described, and diagnostic characters of this new species of Telomyxa are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1985.tb03037.x
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  • 4
    Electronic Resource
    Electronic Resource
    Spores of Thelohania in Adult Female Anopheles: Development and Transovarial Transmission, and Redescriptions of T. legeri Hesse and T. obesa Kudo (1968)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 15 (1968), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. Two distinctly different types of spores were found in Anopheles mosquitoes infected with Thelohania. One type, found in larvae, is commonly known to protozoologists and was used in the original descriptions of Thelohania legeri Hesse and T. obesa Kudo. The 2nd type, which is cylindrical and unlike any Thelohania spores previously described, is associated with the transovarial cycle of these Microsporida in the adult. Spores of the 2nd type, which were previously described as Microsporida of the genus Nosema, develop in the blood cells of females. Spores similar to but obviously of another species than the ones found in these Anopheles females were also found in Aedes cantans (Meigen) and Culex salinarius Coquillett females. These cylindrical spores were associated with Thelohania infections in the larvae of these mosquitoes. The cylindrical spores have distinct taxonomic characters which when used with the structural characters of stages in the larvae aid in the differentiation of the 2 species. Descriptions of these stages in the 2 Thelohania species are presented with a brief discussion of the transovarial development of the parasites in the female bost.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1968.tb02221.x
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  • 5
    Electronic Resource
    Electronic Resource
    New Family, Genus, and Species of Microsporida (Protozoa: Microsporida) from the Tropical Fire Ant, Solenopsis geminata (Fabricius) (Insecta: Formicidae) (1978)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 25 (1978), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. A new species of Microsporida, Burenella dimorpha sp. n., representing a new family, Burenellidae fam. n. and genus, is described on the basis of light- and electron-microscope observations. The family is characterized by 2 sequences of sporogony, each sequence having morphologically different sporonts and spores. The parasite infects the tropical fire ant, Solenopsis geminata (Fabricius), producing distinct pathologic manifestations (clearing of the cuticle and eye malformation) and death in the pupal stage of development. Transmission of the infection per os to healthy S. geminata, to the Southern fire ant, Solenopsis xyloni McCook, and to the red and black imported fire ants, Solenopsis invicta Buren and Solenopsis richteri Forel, is reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1978.tb03858.x
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