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  • Biomphalaria glabrata  (1)
  • Endemic infectious diseases  (1)
  • 2020-2024
  • 1980-1984  (2)
  • 1925-1929
Collection
Keywords
Publisher
Years
  • 2020-2024
  • 1980-1984  (2)
  • 1925-1929
Year
  • 1
    Electronic Resource
    Electronic Resource
    Integral equation models for endemic infectious diseases (1980)
    Springer
    Journal of mathematical biology 9 (1980), S. 37-47 
    Details
    ISSN: 1432-1416
    Keywords: Epidemiology ; Endemic infectious diseases ; Deterministic models ; Thresholds ; Distributed delays ; Stability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Mathematics
    Notes: Summary Endemic infectious diseases for which infection confers permanent immunity are described by a system of nonlinear Volterra integral equations of convolution type. These constant-parameter models include vital dynamics (births and deaths), immunization and distributed infectious period. The models are shown to be well posed, the threshold criteria are determined and the asymptotic behavior is analysed. It is concluded that distributed delays do not change the thresholds and the asymptotic behaviors of the models.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00276034
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    An ultrastructural study of the effect of parasitism by larval Schistosoma mansoni on the calcium reserves of the host, Biomphalaria glabrata (1984)
    Springer
    Cell & tissue research 236 (1984), S. 643-649 
    Details
    ISSN: 1432-0878
    Keywords: Calcium cells ; Shell ; Biomphalaria glabrata ; Schistosoma mansoni
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The tissues of Biomphalaria glabrata contain three types of calcium cells which can be differentiated by their location and the size and number of their contained corpuscles. X-ray analysis has confirmed the presence of calcium and magnesium in the corpuscles. Molluscs containing the larval stages of Schistosoma mansoni at 40 days post infection show disintegration of the calcareous corpuscles in Type-A calcium cells and erosion of the inner surface of the shell.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00217234
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    Paper (German National Licenses)
    Fulltext
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