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Related Experiment Videos

Coagulase in starved Staphylococcus aureus

J Mikucki, J Szarapińska-Kwaszewska, E Szewczyk

    Zentralblatt Fur Bakteriologie, Parasitenkunde, Infektionskrankheiten Und Hygiene. Zweite Naturwissenschaftliche Abteilung: Mikrobiologie Der Landwirtschaft Der Technologie Und Des Umweltschutzes
    |January 1, 1978
    PubMed
    Summary
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    Starvation causes Staphylococcus aureus to lose amino acids and proteins, reducing coagulase production. Restoring nutrients fully restores the bacteria

    Area of Science:

    • Microbiology
    • Bacterial Physiology
    • Enzyme Production

    Background:

    • Staphylococcus aureus is a significant human pathogen.
    • Bacterial physiology is influenced by nutrient availability.
    • Coagulase is an important virulence factor produced by S. aureus.

    Purpose of the Study:

    • To investigate the impact of nutrient starvation on S. aureus.
    • To determine the effect of starvation on coagulase production and release.
    • To assess the recovery of coagulase production after nutrient restoration.

    Main Methods:

    • Culturing S. aureus strain Smith under starvation conditions.
    • Measuring free amino acids and proteins in starved cells.
    • Quantifying coagulase levels in cells and medium.

    Related Experiment Videos

  • Monitoring coagulase production after refeeding.

    • Main Results:

    • Starved S. aureus cells released significant amounts of amino acids and proteins.
    • Coagulase levels decreased in starved cells and were detected in the medium.
    • Cells refed with nutrients showed reduced coagulase production compared to controls.
    • Restoration of the amino acid pool restored coagulase production to initial levels.

    Conclusions:

    • Nutrient starvation negatively affects S. aureus coagulase production.
    • Amino acid availability is crucial for maintaining coagulase synthesis in S. aureus.
    • Starvation-induced changes in S. aureus are reversible upon nutrient repletion.