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Staphylococcus epidermidis

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  • Staphylococcus epidermidis

    Staphylococcus epidermidis : Group of bacteria gram positive cocci
    Characteristics
    • Rarely cause infections in health people .
    • Gr + Ve Cocci .
    • Non Sporing , Non Motile Cocci
    • Opportunistic pathogen.
    • Facultative anaerobic .
    • Slime layer.


    Habitat
    • Humans (skin) .
    • Always present in hospital environment .
    • Survives drying . Tolerant of Salts .

    Transmission
    • Direct contact




    Pathogenesis
    • Lower pathogenicity than Staph. Aureus .
    • Viscous extracellular slime = Enable the bacteria to adhere to a foreign surface .

    Diseases
    • Urinary Tract Infection ( UTI )
    • Prosthetic valve Endocarditis.
    • Bacteremia.
    • surgical wounds.
    • central nervous system infection.

    Laboratory Identification
    • White Colonies on Blood Agar
    • Catalase +Ve , Coagulase -Ve , DNase – Ve
    • Sensitive to Novobiocin disc .


    How to differentiate between Staphylococcus epidermidis and Staphylococcus saprophyticus ?
    Novobiocin test
    Example of the image Staphylococcus epidermidis


  • #2
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    • #3
      رائـــــــــع جدا
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