This information is for reference purposes only. It was current when produced and may now be outdated. Archive material is no longer maintained, and some links may not work. Persons with disabilities having difficulty accessing this information should contact us at: https://info.ahrq.gov. Let us know the nature of the problem, the Web address of what you want, and your contact information.
Please go to www.ahrq.gov for current information.
National Nosocomial Infections Surveillance (NNIS) System
U.S. Department of Health and Human Services, Centers for Disease Control and Prevention (CDC).
Mode of Administration
Participation in the NNIS System is voluntary and involves only acute care general hospitals in the United States. At the beginning of 2000, approximately 315 hospitals were participating in the NNIS System. Participation is limited to hospitals with 100 or more beds that meet minimum requirements for infection control staffing.
The data are collected uniformly by trained infection control personnel using surveillance protocols that target inpatients at high risk of infection and are reported routinely to CDC where they are aggregated into the database.
The standardized protocols, called "surveillance components" include: adult and pediatric intensive care unit (ICU), high-risk nursery (HRN), and surgical patient. The components may be used singly or simultaneously, but once selected, they must be used for a minimum of 1 calendar month. All infections are categorized into major and specific infection sites using standard CDC definitions that include laboratory and clinical criteria.
Adult and pediatric intensive care units (ICUs): all sites of nosocomial infection in patients located in ICUs.
High-risk nurseries (HRNs): all sites of nosocomial infection in patients located in HRNs.
Surgical patients: all infections or surgical-site infections (SSI) of patients undergoing operative procedures on the NNIS list.
Data reported monthly; aggregate report published annually.
Agency homepage: http://www.cdc.gov.
Data system homepage: http://www.cdc.gov/ncidod/hip/surveill/nnis.htm.
Return to Data Sources Appendix
Return to Contents