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Data and Statistics

HAI Prevalence Survey

The CDC healthcare-associated infection (HAI) prevalence survey provides an updated national estimate of the overall problem of HAIs in U.S. hospitals. Based on a large sample of U.S. acute care hospitals, the survey found that on any given day, about 1 in 25 hospital patients has at least one healthcare-associated infection. There were an estimated 722,000 HAIs in U.S acute care hospitals in 2011. About 75,000 hospital patients with HAIs died during their hospitalizations. More than half of all HAIs occurred outside of the intensive care unit.

Estimates of Healthcare-Associated Infections Occurring in Acute Care Hospitals in the United States, 2011

Major Site of Infection Estimated No.
Pneumonia 157,500
Gastrointestinal Illness 123,100
Urinary Tract Infections 93,300
Primary Bloodstream Infections 71,900
Surgical site infections from any inpatient surgery 157,500
Other types of infections 118,500
Estimated total number of infections in hospitals 721,800

To read the full report, please visit: CDC HAI Prevalence Survey
Magill SS, Edwards JR, Bamberg W, et al. Multistate Point-Prevalence Survey of Health Care–Associated Infections. N Engl J Med 2014;370:1198-208.

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HAI Progress Report

The CDC National and State Healthcare-Associated Infections Progress Report is a report that gives a closer look at the healthcare-associated infections (HAIs) most commonly reported to CDC using the National Healthcare Safety Network (NHSN). This is an annual report that describes national and state progress in preventing central line-associated bloodstream infections, catheter-associated urinary tract infections, surgical site infections after colon surgery and surgical site infections after abdominal hysterectomy. The report is based on 2012 data.

Estimates of Selected* Healthcare-Associated Infections Occurring in Acute Care Hospitals, 2011± or 2012†

Type of Healthcare-Associated Infection Estimated No.
Catheter-associated urinary tract infections
(wards and critical care units)
54,500†
Central line-associated bloodstream infections
(wards and critical care units)
30,100†
Surgical Site Infections associated with
10 surgical procedures
53,700†
Hospital-onset Clostridium difficile infections
(all hospital locations)
107,700±

* Infections closely tied to performance measures reported as part of the CMS Hospital Quality Reporting Program

To read the full report, please visit: National and State Healthcare-Associated Infections Progress Report 2012

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Previous Estimates of HAIs

Additional reports can be found at on the NHSN Data & Statistics page.

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Monitoring HAIs

CDC receives data on healthcare-associated infections (HAIs) through parallel efforts.

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