Unrecognized burden of methicillin-resistant Staphylococcus aureus and vancomycin-resistant Enterococcus carriage in...

Area of Science:

• Infectious Diseases
• Pediatric Critical Care
• Clinical Microbiology

Background:

• Children's hospitals commonly use clinical culture data to assess methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant Enterococcus (VRE) carriage.
• Estimating the true burden of these resistant organisms is crucial for effective infection control.

Purpose of the Study:

• To evaluate the impact of a weekly surveillance culture program on identifying MRSA and VRE carriers in a pediatric intensive care unit (PICU).
• To determine if enhanced surveillance improves the accuracy of incidence rate estimation and patient isolation strategies.

Main Methods:

• Implementation of a systematic weekly surveillance culturing program within the PICU.
• Analysis of surveillance data to identify previously unrecognized carriers of MRSA and VRE.
• Comparison of incidence rates and isolation-days before and after program implementation.

Main Results:

• The weekly surveillance program uncovered a significant, previously unrecognized reservoir of MRSA and VRE carriers.
• This enhanced surveillance led to more precise estimations of MRSA and VRE carriage incidence rates.
• An increase in the number of isolation-days for patients was observed, likely due to the detection of more carriers.

Conclusions:

• Routine clinical cultures may underestimate the prevalence of MRSA and VRE carriage in pediatric populations.
• Weekly surveillance cultures are effective in identifying hidden reservoirs of resistant organisms in PICUs.
• Implementing enhanced surveillance can improve infection control measures and resource allocation for patients carrying MRSA and VRE.