The specific outcome is to determine whether the colony count of Propionibacterium acnes, one of the commonest causes of shoulder infection and not eradicated by conventional forms of surgical preparatory solutions and antibiotics, in a shoulder surgical wound will be altered by the use of subdermal cefazolin.
Age range
18 Years – 90 Years
Sex
ALL
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Change in P.acnes colony count
Timeframe: Baseline tissue sampling prior to subcutaneous antibiotic administration, and tissue sampling 60 minutes after