NHSN users are advised of an error in the March 2018 NHSN Newsletter.  In the article “Device Day Count for Determination of Device- associated Infections in 2018: Notes for Determining Catheter-association for UTI and Counting Denominator Days for CLABSI Surveillance” on page 8, note #2 should read: “Device days should be included in central line counts for denominator summary data.” The word NOT is deleted. See newsletter erratum.