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Carriers of carbapenem-resistant Enterobacteriaceae (CRE) are often readmitted, exposing patients to CRE cross-transmission. OBJECTIVE To identify predictors of persistent CRE carriage upon readmission, directing a risk prediction score. Retrospective cohort study. University-affiliated general hospital. A cohort of 168 CRE carriers with 474 readmissions. The primary and secondary outcomes were CRE carriage status at readmission and length of CRE carriage. Predictors of persistent CRE carriage upon readmission were analyzed using a generalized estimating equations (GEE) multivariable model. Readmissions were randomly divided into derivation and validation sets. A CRE readmission score was derived to predict persistent CRE carriage in 3 risk groups: high, intermediate, and low. The discriminatory ability of the model and the score were expressed as C statistics. CRE carrier status persisted for 1 year in 33% of CRE carriers. Positive CRE status was detected in 202 of 474 readmissions (42.6%). The following 4 variables were associated with persistent CRE carriage at readmission: readmission within 1 month (odds ratio [OR], 6.95; 95% confidence interval [CI], 2.79-17.30), positive CRE status on preceding admission (OR, 5.46; 95% CI, 3.06-9.75), low Norton score (OR, 3.07; 95% CI, 1.26-7.47), and diabetes mellitus (OR, 1.84; 95% CI, 0.98-3.44). The C statistics were 0.791 and 0.789 for the derivation set (n=322) model and score, respectively, and the C statistic was 0.861 for the validation set of the score (n=152). The rates of CRE carriage at readmissions (validation set) for the groups with low, intermediate, and high scores were 8.6%, 38.9%, and 77.6%, respectively. CRE carrier state commonly persists upon readmission, and this risk can be estimated to guide screening policy and infection control measures.

Prevention of central-line-associated bloodstream infection (CLABSI) represents a complex challenge for the teams involved in device insertion and maintenance. First-tier practices for CLABSI prevention are well established. We describe second-tier prevention practices in Israeli medical-surgical ICUs and assess their association with CLABSI rates. In June 2017, an online survey assessing infection prevention practices in general ICUs was sent to all Israeli acute-care hospitals. The survey comprised 14 prevention measures supplementary to the established measures that are standard of care for CLABSI prevention. These measures fall into 2 domains: technology and implementation. The association between the number of prevention measures and CLABSI rate during the first 6 months of 2017 was assessed using Spearman's correlation. We used negative binomial regression to calculate the incidence rate ratio (IRR) associated with the overall number of prevention measures and with each measure individually. The CLABSI rates in 24 general ICUs varied between 0.0 and 17.0 per 1,000 central-line days. Greater use of preventive measures was associated with lower CLABSI rates (ρ, -0.70; P < .001). For each additional measure, the incidence of CLABSI decreased by 19% (IRR, 0.81; 95% CI, 0.73-0.89). Specific measures associated with lower rates were involvement of ward champions (IRR, 0.47; 95% CI, 0.31-0.71), auditing of insertions by infection control staff (IRR, 0.35; 95% CI, 0.19-0.64), and simulation-based training (IRR, 0.38; 95% CI, 0.22-0.64). Implementation of second-tier preventive practices was protective against CLABSI. Use of more practices was correlated with lower rates.