Methicillin-Resistant Staphylococcus aureus

Hospitals Reportedmore info

3,670general acute care hospitals reported in 2018

Infections Reportedmore info

8,222Methicillin-Resistant Staphylococcus aureus in 2018

Changes over Timemore info

16%significant decrease in SIR from 2015 national baseline to 2018 (lower SIRs are better)

HAI Profile

Methicillin-Resistant Staphylococcus aureus

Methicillin-resistant Staphylococcus aureus (MRSA) is a type of bacteria usually spread by contaminated hands. In a healthcare setting, such as a hospital, MRSA can cause serious bloodstream and other infections, particularly in patients who have indwelling devices or have had surgery. Healthcare-associated infections (HAIs) are infections that patients can get while receiving medical treatment in a healthcare facility. Working toward the elimination of HAIs is a CDC priority. The CDC provides national data on infection rates through the National Healthcare Safety Network. Standardized Infection Ratios (SIRs) are summary statistics that allow monitoring of HAIs over time.

The Standardized Infection Ratio for Methicillin-Resistant Staphylococcus aureus was 0.84 across general acute care hospitals in 2018.

The Centers for Disease Control and Prevention (CDC) is committed to protecting patients and healthcare workers from adverse healthcare events and promoting safety, quality, and value in healthcare delivery. Preventing healthcare-associated infections (HAIs) is a top priority for CDC and its partners in public health and healthcare. The National and State Healthcare-Associated Infections (HAI) Progress Report provides a summary of select HAIs across three healthcare settings; acute care hospitals (ACHs), inpatient rehabilitation facilities (IRFs) and long-term acute care hospitals (LTACHs).

  • HAI Progress Increase, SIR is significantly higher (worse) than comparison group.
  • HAI Progress No Change, SIR increase or decrease is not significantly different than comparison group.
  • HAI Progress Decrease, SIR is significantly lower (better) than comparison group.
  • HAI Progress Significant Increase, Significant increase from the previous year.
  • HAI Progress No Change, No significant change from the previous year.
  • HAI Progress Significant Decrease, Significant decrease from the previous year.

MRSA Bacteremia

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decrease 16%, Lower Compared to Nat'l Baseline

This report, summarized by state, is based on 2018 data published in 2019, and uses the 2015 Baseline and risk-adjusted models. HAI data summarized at the hospital-level are published on the Hospital Compare website.

Key Data Points

  • no change, National ACHs reported no significant change in MRSA Bacteremia between 2017 and 2018
  • 6%
    , Among the 1,905 national ACHs with enough data to calculate an SIR, 6% had an SIR significantly higher (worse) than 0.84, the value of the national SIR.

National Data for General Acute Care Hospitals, Year 2018

Geographic Location

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Occurrences of Methicillin-Resistant Staphylococcus aureus vary across U.S. states and territories. Like the differing rates of antibiotic usage and resistance in the U.S., the variation in the occurrence of Methicillin-Resistant Staphylococcus aureus depends on many factors, such as the number of preventive programs in place, individual healthcare organization performance, other patient health conditions, and the environmental conditions within each location.

MRSA Standardized Infection Ratios by State Map

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This map displays the variation in Methicillin-Resistant Staphylococcus aureus SIRs across the U.S. for general acute care hospitals in 2018.

MRSA Bacteremia Standardized Infection Ratios by State List

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This graph shows the national SIR for Methicillin-Resistant Staphylococcus aureus compared to state SIRs, in 2018 for general acute care hospitals. Geographies with insufficient data reported for the selected year or hospital type are not displayed.

Changes over Time

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Based on 2018 data, most HAIs have decreased when compared to the national baseline or to the previous year. While this is promising news, more action is needed at every level of public health and health care to eliminate infections that commonly threaten hospital patients.

MRSA Bacteremia Standardized Infection Ratio Changes over Time

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This graph displays the changes over time in Standardized Infection Ratio (SIR) for the United States.


  • HAIs on this page include Central Line-Associated Bloodstream Infection (CLABSI), Catheter-Associated Urinary Tract Infection (CAUTI), Surgical Site Infections (SSI), Clostridioides difficile (C. difficile) infections, MRSA Bacteremia, and Ventilator-Associated Events (VAE).
  • All HAI data provided on this page are maintained by the CDC's National Healthcare Safety Network (NHSN).
  • Data are only displayed for U.S. states/territories for which at least 5 facilities reported an HAI in the given report year.
  • HAI information available in the Patient Safety Portal include data from 2015 through 2018.
  • Map legends are classified using the Jenks Natural Breaks method.
  • See the Current HAI Progress Report Technical Appendix for the full methodology and details about the data. Past HAI Progress Reports are described in the Data Archive.