Abstract
BackgroundMethicillin-resistant Staphylococcus aureus (MRSA) is among the most important nosocomial pathogens in the intensive care unit (ICU) worldwide, including Taiwan. Since 1997, our neonatal ICUs (NICUs) had become endemic for MRSA.Methodology/Principal FindingsTo control MRSA spread in our NICUs, we implemented a series of infection control measures stepwise, including reinforcement of hand hygiene since January 2000, augmentation of aseptic care over the insertion site of central venous catheter since July 2001, introduction of alcohol-based handrubs since April 2003, surveillance culture for MRSA and cohort care for the colonized patients between March 2003 and February 2004, and surveillance culture with subsequent decolonization of MRSA between August 2005 and July 2006. After implementation of these measures, MRSA healthcare-associated infection (HAI) density reduced by 92%, from 5.47 episodes per 1000 patient-days in 1999 to 0.45 episodes per 1000 patient-days in 2006; MRSA bloodstream infection reduced from 40 cases in 1999 to only one case in 2006. Compared to those obtained during the period of surveillance culture without decolonization, both rates of MRSA colonization (8.6% vs. 41%, p<0.001) and infection (1.1% vs. 12%, p<0.001) decreased significantly during the period of surveillance and decolonization. Molecular analysis of the clinical isolates during the study period showed that the endemic clone, which dominated between 1998 and 2005, almost disappeared in 2006, while the community clones increased significantly in 2006–2007.Conclusion/SignificanceThrough infection control measures, MRSA HAIs can be successfully controlled, even in areas with high levels of endemic MRSA infections such as our NICUs.
Highlights
Methicillin-resistant Staphylococcus aureus (MRSA) is among the most important pathogens of bacteremia in the intensive care units (ICU)
The present study demonstrates that through infection control measures, healthcare-associated infection (HAI) caused by MRSA can be successfully controlled temporarily, even in high level MRSA endemic neonatal intensive care units
MRSA HAI density was reduced by 92%; HA bloodstream infection caused by MRSA was reduced from 40 cases per year to only one case per year
Summary
Methicillin-resistant Staphylococcus aureus (MRSA) is among the most important pathogens of bacteremia in the intensive care units (ICU). To reduce and control healthcare-associated infections (HAIs) caused by MRSA, a ‘‘search and destroy’’ strategy, which first detects the patients with MRSA colonization and decolonizes the MRSA with certain antimicrobial agents, was recently proposed and implemented in some hospitals of different countries, with inconsistent effects [12,13,14,15,16]. In our neonatal ICUs (NICUs), S. aureus is the leading pathogen of HAIs and MRSA represented majority of all the S. aureus isolates since 1997. We report our experiences for MRSA control in the NICUs. Methicillin-resistant Staphylococcus aureus (MRSA) is among the most important nosocomial pathogens in the intensive care unit (ICU) worldwide, including Taiwan. Since 1997, our neonatal ICUs (NICUs) had become endemic for MRSA
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