N9. MRSA, MSSA and other gram positive pathogens
Oral Abstract Submission
Background : A trial of universal decolonization (alcohol-based nasal antiseptic plus chlorhexidine gluconate bathing) was instituted for 12 months, in a 536-bed short-term acute care hospital, as a replacement for nasal screening, contact precautions (CP) and decolonization of methicillin-resistant Staphylococcus aureus (MRSA)-colonized patients. The impact on the rate of MRSA bacteremia and costs associated with nasal screening tests, isolation, and gown use, was assessed.
Methods : Prior to the universal decolonization trial, patients at high-risk for MRSA colonization were screened using a nasal polymerase chain reaction (PCR) test, and those that tested positive were decolonized with 5 days of mupirocin nasal ointment and daily CHG bathing, and were placed in CP. Starting in April 2018, a universal decolonization protocol was instituted for all hospitalized patients, with twice daily alcohol-based nasal antiseptic (in place of mupirocin), and daily bathing with CHG foam soap (in place of CHG cloths). Nasal screening of high-risk patients, targeted decolonization and CP for MRSA-colonized patients, was discontinued during the 12-month universal decolonization trial period. Outcome measures for the trial included MRSA bacteremia per National Healthcare Surveillance Network (NHSN) multidrug resistant organism (MDRO) Lab ID definition, isolation day count, utilization of gowns and nasal screening tests with estimated costs associated. Measures for the 12-month trial period were compared to those of the prior 12-month period, i.e., April 2017 – March 2018.
Results : Compared to prior 12-month period, during the universal decolonization trial there was a 42% reduction in isolation days ($118/day), a 74% reduction in nasal PCR tests ($36/each), and an 11% decrease in the monthly use of gowns ($12/each). The total cost avoidance (after accounting for the cost of the alcohol-based nasal antiseptic and CHG soap) was $1,394,685. There was no statistical change in the MRSA bacteremia rate (.067 to .070) per 1,000 patient days.
Conclusion : Replacement of nasal screening, decolonization and CP for colonized MRSA patients with universal decolonization, using twice daily alcohol-based nasal antiseptic paired with daily CHG bathing, was found to be a safe and cost-saving protocol.