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Passive Administration of Monoclonal Antibodies Against H. capsulatum and Others Fungal Pathogens
09:57

Passive Administration of Monoclonal Antibodies Against H. capsulatum and Others Fungal Pathogens

Published on: February 14, 2011

INTRACELLULAR BEHAVIOR OF HISTOPLASMA CAPSULATUM

D H HOWARD

    Journal of Bacteriology
    |January 1, 1964
    PubMed

    Insights

    This study investigated Histoplasma capsulatum within mouse cells. The fungus showed no signs of intracellular death and had a generation time of approximately 10.3 hours.

    Area of Science:

    • Microbiology
    • Mycology
    • Cell Biology

    Background:

    • Histoplasma capsulatum is an important fungal pathogen.
    • Understanding its intracellular behavior is crucial for developing effective treatments.
    • Previous studies have not fully elucidated the intracellular fate and growth dynamics of H. capsulatum.

    Purpose of the Study:

    • To investigate the tinctorial characteristics of Histoplasma capsulatum within mouse histiocytes.
    • To determine the intracellular generation time of H. capsulatum.
    • To assess the viability of H. capsulatum cells within host cells.

    Main Methods:

    • Mouse histiocytes were maintained in tissue culture.
    • Histoplasma capsulatum cells were stained using May Grunwald-Giemsa, Methenamine Silver, and Periodic acid-Schiff (PAS) methods.
    • Viable and nonviable fungal cells were observed and characterized.

    Main Results:

    • Heat-induced or natural cell death in H. capsulatum resulted in loss of nuclear differentiation but not changes in cell wall staining.
    • No tinctorial evidence of intracellular death of H. capsulatum was observed in normal mouse histiocytes.
    • The estimated intracellular generation time of H. capsulatum was 10.3 ± 1.5 hours, unaffected by histiocyte age or mouse strain.

    Conclusions:

    • Histoplasma capsulatum appears to survive and replicate within mouse histiocytes without readily apparent signs of intracellular death.
    • The determined generation time provides a key parameter for understanding H. capsulatum's intracellular proliferation.
    • Further research is warranted to explore host-pathogen interactions and mechanisms of H. capsulatum pathogenesis.
    Keywords:
    EXPERIMENTAL LAB STUDYHISTOPLASMAPHAGOCYTOSISRETICULOENDOTHELIAL SYSTEMSTAINS AND STAININGTISSUE CULTURE

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