Antibiotics by Condition

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    • Common morphology:
      • S. pneumoniae - GP diplococci
      • N. menitidis - GN diplococci
      • H. influenza - Pleiomorphic GN coccobacilli
      • L. monocytogenes - GP rods.

     

    Penicillins

     

    Cephalosporins

     

    Organism Based Approach

     

    Organism Treatment
    Listeria  
    Entercocci
    • Aminopenicillin (Ampicillin/Amoxicillin)
      • If sensitive
    • Ampicillin-Gentamycin (Amp-Gent)
      • Shown EFFECTIVE against enterococci.  Amp-Gent have synergistic activity!
    • NEW!! Ampicillin-Ceftriaxone
      • Snow as EFFECTIVE against enterococci as Amp-Gent.   (same synergism)
    • Vancomycin
      • Last resport!  Avoid using (try amp-gent first)
      • Vancomycin Resistant Entercoccus (VRE) is on the rise

     

    MRSA

    Oral:

    • Septra
    • Doxycycline (other tetracyclines)
    • Clindamycin
    • Linezolid

    NOTE: Septra/Doxy aren't reliable against strep, so use another agent for MRSA-risky celluitis to cover strep.

    IV:

     

     

    Gastroenteritis

    • Yersinia
    • Salmonella
    • Campylobacter
    • Shingella
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