Prévention NosoBase ID notice : 383325

Methods: Between April 1, 2012, and January 31, 2013, we surveyed 971 hospitals in Japan. The survey instrument assessed general hospital and infection prevention program characteristics and use of infection prevention practices, including practices specific to preventing catheter-associated urinary tract infection (CAUTI), central line-associated bloodstream infection (CLABSI), and ventilator-associated pneumonia (VAP). Logistic regression models were used to examine multivariable associations between hospital characteristics and the use of the various prevention practices.

Results: A total of 685 hospitals (71%) responded to the survey. Maintaining aseptic technique during catheter insertion and maintenance, avoiding routine central line changes, and using maximum sterile barrier precautions and semirecumbent positioning were the only practices regularly used by more than one-half of the hospitals to prevent CAUTI, CLABSI, and VAP, respectively. Higher safety-centeredness was associated with regular use of prevention practices across all infection types.

Conclusions: Although certain practices were used commonly, the rate of regular use of many evidencebased prevention practices was low in Japanese hospitals. Our findings highlight the importance of fostering an organization-wide atmosphere that prioritizes patient safety. Such a commitment to patient safety should in turn promote the use of effective measures to reduce health care-associated infections in Japan.

Aim: To assess the validity of computer-assisted surveillance (CAS) of ICU-acquired infection performed by analysis of this database.

Methods: CAS was compared with prospective paper-based surveillance (PBS) for ICU-acquired respiratory tract infection (RTI), bloodstream infection (BSI) and urinary tract infection (UTI) over four months at a 36-bed medical and surgical ICU. An independent panel reviewed the data in the case of discrepancy between CAS and PBS.

Findings: PBS identified 89 ICU-acquired infections (13 BSI, 18 UTI, 58 RTI) and CAS identified 90 ICU-acquired infections (14 BSI, 17 UTI, 59 RTI) in 876 ICU admissions. There was agreement between CAS and PBS on 13 BSI (100 %), 14 UTI (77.8 %) and 42 RTI (72.4 %). Overall, there was agreement on 69 infections (77.5%), resulting in a kappa score of 0.74. Discrepancy between PBS and CAS was the result of capture error in 11 and 14 infections, respectively. Interobserver disagreement on probability (13 RTI) and focus (two RTI, one UTI) occurred for 16 episodes. The time required to collect information using CAS is less than 30% of the time required when using PBS.

Conclusion: CAS for ICU-acquired infection by analysis of a database built through daily workflow is a feasible surveillance method and has good agreement with PBS. Discrepancy between CAS and PBS is largely due to interobserver variability.


NosoBase ID notice : 382962

Analyse de séries temporelles destinée à observer l’impact d’une intervention de formation organisée de manière centrale sur la prévention des bactériémies liées aux voies centrales dans 32 unités de réanimation en Allemagne
Hansen S; Schwab F; Schneider S; Sohr D; Gastmeier P; Geffers C. Time-series analysis to observe the impact of a centrally organized educational intervention on the prevention of central-line-associated bloodstream infections in 32 German intensive care units. The journal of hospital infection 2014/08; 87(4): 220-226.
Mots-clés : SOIN INTENSIF; ANALYSE; FORMATION; PREVENTION; BACTERIEMIE; CATHETER; TAUX; PERSONNEL
Background: Prevention measures reduce central-line-associated bloodstream infections (CLABSIs) but are not always implemented.

Aim: To investigate the effect of a central educational programme in German intensive care units (ICUs) on CLABSI rates.

Methods: Thirty-two German ICUs with CLABSI rates greater than or equal to the national average were compared with two control groups containing 277 and 67 ICUs. Processes and CLABSI rates were surveyed before, during and two years after the implementation of a year-long intervention programme. Segmented regression analysis of interrupted time series using generalized linear models was performed to estimate the association between the number of CLABSIs per month and time, intervention and other confounders, with the clustering effect within an ICU taken into account.

Findings: In total, 508 cases of CLABSI were observed over 266,471 central line (CL)-days. At baseline, the pooled mean CLABSI rate was 2.29 per 1000 CL-days, and this decreased significantly to 1.64 per 1000 CL-days in the follow-up period. Compared with baseline, the relative risk for CLABSI was 0.88 [95% confidence interval (CI) 0.70-1.11] for the intervention period and 0.72 (95% CI 0.58-0.88) for the follow-up period. No changes were observed in either control group. Following successful implementation of the programme, ICUs showed a significant decrease in CLABSI rates. Although rates were already decreasing prior to implementation of the intervention, the invitation to participate in the study, and increased general awareness of CLABSI prevention through use of the comprehensive multi-modal training materials may have had a beneficial effect on practice.

Methods: A prospective cohort of patients naive for S. aureus colonization was established and followed (January 2008 through October 2010) in 4 French LTCFs. Nasal colonization status and potential risk factors were assessed weekly for 13 weeks after inclusion. Variables associated with S. aureus acquisition were identified in a nested-matched case-case-control study using conditional logistic regression models. Cases were patients who acquired MRSA (or methicillin-sensitive S. aureus [MSSA]). Patients whose nasal swab samples were always negative served as controls. Matching criteria were center, date of first nasal swab sample, and exposure time.

Results: Among 451 included patients, 76 MRSA cases were matched to 207 controls and 112 MSSA cases to 208 controls. Multivariable analysis retained fluoroquinolones (odds ratio, 2.17; 95% confidence interval, 1.01-4.67), male sex (2.09; 1.10-3.98), and more intensive care at admission (3.24; 1.74-6.04) as significantly associated with MRSA acquisition, and body-washing assistance (2.85; 1.27-6.42) and use of a urination device (1.79; 1.01-3.18) as significantly associated with MSSA acquisition.

Conclusions: Our results suggest that fluoroquinolones are a risk factor for MRSA acquisition. Control measures to limit MRSA spread in LTCFs should also be based on optimization of fluoroquinolone use.

Methods: An observational and prospective study was conducted between April 2009 and June 2011 at 15 hospitals in Bogotá, Colombia. A detailed epidemiological profile was made of 162 children infected with MRSA. The isolates were subjected to antimicrobial susceptibility testing, molecular characterization including 21 virulence genes, SCCmec, spa and agr typing, multilocus sequence typing (MLST), and pulsed-field gel electrophoresis (PFGE).

Results: Among all isolates included in the study, 85.8% were obtained from patients whose infectious process was initiated in the community; of these, 69.8% occurred in patients without healthcare-associated risk factors. The molecular characterization of the isolates showed a high proportion (95.1%) containing a community-genotype profile with a high prevalence of SCCmec type IV, PVL-positives, and also related to CC8. Most CG-MRSA isolates (143, 92.9%) were genetically related to the pandemic clone USA300, differing by the presence of SCCmec IVc and the absence of the arginine catabolic mobile element (ACME).

Conclusions: An increase in the frequency of CG-MRSA infections has been reported worldwide. In this study we found that almost all MRSA infections in our pediatric population were caused by community-genotype isolates, supporting the success of the CG-MRSA clones.

Methods: During the 6-month intervention period, 327 patients were subjected to whole-body bath with 2% CHG-impregnated wipes. blaIMP (active on imipenem), blaVIM (Verona integron-encoded metallo-ß-lactamase), and blaoxacillinase (OXA) of A baumannii were typed. Isolates were genotyped by pulsed-field gel electrophoresis. Minimum inhibitory concentrations (MIC) to CHG were determined by the agar dilution method and drug susceptibility determined using the broth microdilution method. Biofilm formation was determined by crystal violet staining.

Results: We analyzed 80 isolates during the baseline period and 69 isolates during the intervention period. There was a decrease in the MIC(50) and MIC(90) values for CHG for isolates (8 mg/L and 16 mg/L, respectively). All isolates typed positive for OXA(51-like) and 86% typed positive for OXA(24-like) pulsed-field gel electrophoresis identified 2 main clone types. During the intervention period the frequency of clone A decreased and that of clone B increased. Both clones were OXA(24-like) positive.

Conclusions: The A baumannii isolates recovered from patients who received body washing with 2% CHG presented with a significant decrease in CHG MIC values associated with a change in clonality correlating with increased biofilm production.

Methods: A cross-sectional study was performed in HIV-infected patients included in a hospital-based cohort in 2011. Vaccination coverage against hepatitis A virus (HAV), hepatitis B virus (HBV), seasonal and A(H1N1)2009 pandemic influenza, and invasive pneumococcal diseases (IPD) were recorded. Factors associated with vaccination were assessed by multivariate logistic regression.

Results: 2467 patients were included (median age: 47 years; male gender 71.5%; men having sex with men (MSM): 43.9%; CDC stage C: 24.3%; HBV and/or hepatitis C virus co-infection: 14.4%). Median duration of HIV infection was 10 years and 93.1% of patients received combination antiretroviral therapy. At baseline, the median CD4 count was 527 cells/mm(3) and HIV viral load was <50 copies/mL in 83.3% of cases. Vaccination coverage for HBV, HAV, seasonal influenza, A(H1N1)2009 pandemic influenza, and IPD were 61.9%, 47.4%, 30.9, 48.3%, and 64.6%, respectively. Factors independently associated with vaccination were a younger (HBV) or an older age (influenza), male gender (HBV, HAV), MSM (HBV), CD4 count >200/mm(3) and HIV-RNA <50 copies/mL (IPD, influenza), longer duration of HIV infection (IPD, influenza), and follow-up by an experienced physician (HBV, IPD).

Conclusions: Vaccination coverage remained insufficient for all vaccine-preventable infections investigated in this study. Determinants for vaccination were largely not evidence-based, and efforts should be focused on improving physicians' knowledge about guidelines.

Pour tout renseignement, contacter le centre de coordination de lutte contre les infections nosocomiales de votre inter-région :

CCLIN Est Tél : 03.83.15.34.73 Fax : 03.83.15.39.73 cclin.est@chu-nancy.fr

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