Emerging Infectious Disease ISSN: 1080-6059

Use of Binary Cumulative Sums and Moving Averages in Nosocomial Infection Cluster Detection¹

Samuel M. Brown*

, James C. Benneyan†, Daniel A. Theobald‡, Kenneth Sands§, Matthew T. Hahn‡, Gail A. Potter-Bynoe¶, John M. Stelling#**, Thomas F. O'Brien#**, and Donald A. Goldmann¶

Author affiliations: *Massachusetts General Hospital, Boston, Massachusetts, USA; †Northeastern University, Boston, Massachusetts, USA; ‡Vecna Technologies, Inc., Hyattsville, Maryland, USA; §Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA; ¶Children's Hospital, Boston, Massachusetts, USA; #WHO Collaborating Center for Antimicrobial Resistance Surveillance, Boston, Massachusetts, USA; **Brigham and Women's Hospital, Boston, Massachusetts, USA;

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Figure 4

Moving average test iteration detecting an outbreak of methicillin-resistant Staphylococcus aureus. Test parameters were w = 10, k = 4, and included all S. aureus from all body sites from the affected wards, excluding strains found during outbreak investigations. MIC, minimum inhibitory concentration

Figure 4. Moving average test iteration detecting an outbreak of methicillin-resistant Staphylococcus aureus. Test parameters were w = 10, k = 4, and included all S. aureus from all body sites from the affected wards, excluding strains found during outbreak investigations. MIC, minimum inhibitory concentration

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¹ Portions of this research were presented at the 39th Annual Meeting of the Infectious Diseases Society of America (IDSA), San Francisco, California, USA, October 25–28, 2001.

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