S. Aureus Screening and Decolonization

University of Minnesota (UMN)

Status and phase: Completed; Phase 4

Conditions: Wound Infection Due to Staphylococcus Aureus; MRSA Infection of Postoperative Wound

Treatments: Drug: antiseptic bundle; Drug: standard of care

Study type: Interventional

Funder types: Other; Other U.S. Federal agency

Identifiers

NCT02182115

1R03HS022912-01 (U.S. AHRQ Grant/Contract)

Details and patient eligibility

About

Staphylococcus aureus (SA) healthcare-associated infections (HAI) cause significant morbidity and mortality. SA causes 15% of all HAI and 30% of surgical site infections (SSIs). Each year over 40 million Americans undergo operations, 1-10% of whom will acquire SSIs. Such infections double the length of hospitalization and risk of dying, and increase U.S. health care costs by $5-10 billion/year. We need effective interventions to prevent SSIs caused by either methicillin-susceptible (MSSA) or methicillin-resistant (MRSA) strains. Nasal carriers of SA (25-30% of adults) have a 2-14 times greater risk than non-carriers of acquiring an SA SSI. A potential prevention approach is routine pre-operative screening of patients, followed by decolonization of identified SA carriers.

Full description

The long term goal of this research is to help reduce the incidence of SSIs caused by SA, both MSSA and MRSA strains. This will help improve the safety and effectiveness of health care for Americans. Achievement of this goal requires that we first address the following critical knowledge gaps: (i) which surgical patients should be screened pre-operatively; (ii) which body site(s) should be screened for optimal SA detection, and (iii) which decolonization approach is optimal for outpatient use. The goal of this study is to conduct the research needed to determine pre-operative SA carriage rates (including by strain type and site of carriage), to evaluate the practicality (adherence, cost) of a SA decolonization protocol that is self-administered by patients at home. We are conducting randomized clinical trial (RCT) of the efficacy of nasal mupirocin ointment, chlorhexidine gluconate (CHG) mouth rinse, and CHG pre-operative bathing, as performed by the patient at home for 5 days pre-operatively. This protocol will be compared with the current standard of care, usually 1-2 showers with an antiseptic soap before the procedure. Briefly, the aims are as follows:

Aim 1: Determine the efficacy of a novel decolonization protocol, compared with standard of care, for eradicating SA carriage pre-operatively in surgery out-patients. We hypothesize that the SA eradication rate will be 2-3 times higher in the intervention arm compared with the standard of care arm.

Aim 2: Obtain data to inform sample size calculations and cost estimates for a future trial to prevent SSIs, determine screening requirements, and assess treatment adherence. We will: determine the proportion of pre-operative patients who are SA carriers and the sites of carriage, by SA type, determine adherence to the study intervention and standard of care, reasons for non-compliance, and gather cost data to provide preliminary evidence of potential cost-effectiveness of the intervention.

Aim 3: Identify risk factors (demographic, medical) for SA carriage. Gather preliminary data on SSIs in study subjects.

Enrollment: 110 patients

Sex: All

Ages: 18+ years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• All patient who are 18 years and older, able to give informed consent and willing to complete the study decolonization protocol.
• Surgery must be scheduled 2 weeks in the future to allow completion of the study protocol prior to the scheduled operation.
• Patients will be admitted from home the day of the surgery or have the surgery done on an outpatient basis.

Exclusion criteria

• Currently on antibiotic therapy, allergy to mupirocin or CHG.

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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110 participants in 2 patient groups

standard of care

Active Comparator group

Description:

Surgeon's routine for preoperative showering.

Treatment:

Drug: standard of care

antiseptic bundle

Experimental group

Description:

Patients to use study bundle for 5 days prior to scheduled surgery with the following medications to use at home. 1. Chlorhexidine gluconate soap applied for bathing daily. 2. Chlorhexidine gluconate mouthrinse used to rinse mouth twice daily. 3. Nasal mupirocin to applied inside nostrils twice daily.

Treatment:

Drug: antiseptic bundle