Reduction in Hospitalwide Incidence of Infection or Colonization with Methicillin‐Resistant Staphylococcus aureus With Use of Antimicrobial Hand‐Hygiene Gel and Statistical Process Control Charts
From the Infection Control and Hospital Epidemiology Unit (G.H., K.W., G.L., S.B., L.H., R.K., P.B., A.M., D.S.) and the Infectious Diseases Unit (E.C., A.M., D.S.), the Alfred Hospital, Bayside Health, the Department of Epidemiology and Preventive Medicine, Monash University (M.B., C.M., D.S.), and the Centre for Clinical Research Excellence in Infectious Diseases, University of Melbourne (C.M.), Melbourne, Australia.
Objective.
To evaluate the impact of serial interventions on the incidence of methicillin‐resistant Staphylococcus aureus (MRSA).
Design.
Longitudinal observational study before and after interventions.
Setting.
The Alfred Hospital is a 350‐bed tertiary referral hospital with a 35‐bed intensive care unit (ICU).
Interventions.
A series of interventions including the introduction of an antimicrobial hand‐hygiene gel to the intensive care unit and a hospitalwide MRSA surveillance feedback program that used statistical process control charts but not active surveillance cultures.
Methods.
Serial interventions were introduced between January 2003 and May 2006. The incidence and rates of new patients colonized or infected with MRSA and episodes of MRSA bacteremia in the intensive care unit and hospitalwide were compared between the preintervention and intervention periods. Segmented regression analysis was used to calculate the percentage reduction in new patients with MRSA and in episodes of MRSA bacteremia hospitalwide in the intervention period.
Results.
The rate of new patients with MRSA in the ICU was 6.7 cases per 100 patient admissions in the intervention period, compared with 9.3 cases per 100 patient admissions in the preintervention period (
). The hospitalwide rate of new patients with MRSA was 1.7 cases per 100 patient admissions in the intervention period, compared with 3.0 cases per 100 patient admissions in the preintervention period (
). By use of segmented regression analysis, the maximum and conservative estimates for percentage reduction in the rate of new patients with MRSA were 79.5% and 42.0%, respectively, and the maximum and conservative estimates for percentage reduction in the rate of episodes of MRSA bacteremia were 87.4% and 39.0%, respectively.
Conclusion.
A sustained reduction in the number of new patients with MRSA colonization or infection has been demonstrated using minimal resources and a limited number of interventions.
Received October 9, 2006; accepted December 15, 2006; electronically published May 31, 2007.
Cited by
. Infection Control and Hospital Epidemiology 30:4, 346-353Online publication date: 1-Apr-2009.
Online publication date: 1-Mar-2009.
CrossRef
Online publication date: 1-Jul-2008.
Online publication date: 1-Jul-2008.
CrossRef
Online publication date: 1-Jan-2008.
CrossRef
. Infection Control and Hospital Epidemiology 28:12, 1418-1419Online publication date: 1-Dec-2007.
-
Presented in part: Hong Kong Infection Control Nurses’ Association, 2nd International Infection Control Conference; Hong Kong; June 16‐18, 2006 (Abstract 18); and the Australian Infection Control Association, 4th Biennial National Conference; Sydney, Australia; September 20‐22, 2006 (p. 39).



