Preventing Surgical Site Infections: Are we swabbing/treating the wrong orifice? by Steven P. LaRosa, M.D.
A few Friday afternoon consults for prosthetic joint infections got me thinking about the whole issue of preventing surgical site infections (SSI). It is quite common in cardiothoracic surgery and orthopaedic surgery for patients to be screened pre-operatively for Staphylococcus aureus colonization with a nasal culture or PCR. Those who are positive are prescribed nasal Mupirocin to rid the carrier state in hopes of decrease the risk of SSI. Additionally, since patients can carry S. aureus elsewhere (axilla, inguinal, perirectal) patients are instructed to bathe with Chlorhexidene pre-operatively. Despite these decolonization attempts one study showed that 20% of patients remained colonized with MRSA and continued to have SSIs (Baraz et al. Clin Orthop Related Res 2015). What occurred to me in a review of the literature is that maybe we are focusing on the wrong site of colonization. Approximately 20% of people have intestinal colonization of the gastrointestinal tract....