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Open Access Highly Accessed Research article

Surveillance on secular trends of incidence and mortality for device–associated infection in the intensive care unit setting at a tertiary medical center in Taiwan, 2000–2008: A retrospective observational study

Yin-Yin Chen125, Liang-Yu Chen367, Seng-Yi Lin8, Pesus Chou7, Shu-Yuan Liao12 and Fu-Der Wang1467*

Author Affiliations

1 Department of Infection Control, Taipei Veterans General Hospital, Taipei, Taiwan

2 Department of Nursing, Taipei Veterans General Hospital, Taipei, Taiwan

3 Center for Geriatrics and Gerontology, Taipei Veterans General Hospital, Taipei, Taiwan

4 Division of Infectious Diseases, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan

5 School of Nursing, National Yang–Ming University, Taipei, Taiwan

6 School of Medicine, National Yang–Ming University, Taipei, Taiwan

7 Institute of Public Health, and Community Medicine Research Center, National Yang–Ming University, Taipei, Taiwan

8 Division of Infectious Diseases, Department of Medicine, St. Mary’s Hospital Luodong; St. Marys Medicine Nursing and Management College, Luodong, Taiwan

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BMC Infectious Diseases 2012, 12:209  doi:10.1186/1471-2334-12-209

Published: 10 September 2012

Abstract

Background

Device–associated infection (DAI) plays an important part in nosocomial infection. Active surveillance and infection control are needed to disclose the specific situation in each hospital and to cope with this problem effectively. We examined the rates of DAI by antimicrobial-resistant pathogens, and 30–day and in–hospital mortality in the intensive care unit (ICU).

Methods

Prospective surveillance was conducted in a mixed medical and surgical ICU at a major teaching hospital from 2000 through 2008. Trend analysis was performed and logistic regression was used to assess prognostic factors of mortality.

Results

The overall rate of DAIs was 3.03 episodes per 1000 device–days. The most common DAI type was catheter–associated urinary tract infection (3.76 per 1000 urinary catheter–days). There was a decrease in DAI rates in 2005 and rates of ventilator–associated pneumonia (VAP, 3.18 per 1000 ventilator–days) have remained low since then (p < 0.001). The crude rates of 30–day (33.6%) and in–hospital (52.3%) mortality, as well as infection by antibiotic-resistant VAP pathogens also decreased. The most common antimicrobial-resistant pathogens were methicillin–resistant Staphylococcus aureus (94.9%) and imipenem–resistant Acinetobacter baumannii (p < 0.001), which also increased at the most rapid rate. The rate of antimicrobial resistance among Enterobacteriaceae also increased significantly (p < 0.05). After controlling for potentially confounding factors, the DAI was an independent prognostic factor for both 30–day mortality (OR 2.51, 95% confidence interval [CI] 1.99–3.17, p = 0.001) and in–hospital mortality (OR 3.61, 95% CI 2.10–3.25, p < 0.001).

Conclusions

The decrease in the rate of DAI and infection by resistant bacteria on the impact of severe acute respiratory syndrome can be attributed to active infection control and improved adherence after 2003.

Keywords:
Surveillance; Secular trend; Device–associated infection; Intensive care unit; Infection control