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KMID : 1141420170220020063
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Korean Journal of Healthcare-associated Infection Control Prevention
2017 Volume.22 No. 2 p.63 ~ p.70
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Steady Inflow of Vancomycin-Resistant Enterococci from Outside a Hospital
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An Hye-Sun
Park Sang-Won
Ko Su-Hui
Bang Ji-Hwan
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Abstract
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Background: Cross-transmission within hospitals has been considered a major source of vancomycin-resistant enterococci (VRE) acquisition. Inflow of VRE from outside hospitals may also be an important factor in South Korea.
Methods: An active-point surveillance for VRE colonization was performed in one medical ward of a 767-bed hospital using single rectal swabs or stool samples. The proportion of VRE detected within 48 h of admission was sought. Risk factors for VRE acquisition were analyzed. To confirm the persistence of VRE inflow outside a single point, the degree of yearly VRE inflow was assessed by passive surveillance of clinical specimens over 2 years in the hospital, each one year before and after the active surveillance.
Results: The active-point surveillance of 9 days resulted in 28 (28/72, 38.9%) VRE-positive patients, of whom nine (9/72, 12.5%) were patients were estimated to originate from outside the hospital. The duration of hospitalization and the use of antibiotics were significant risk factors for VRE colonization after admission, and the number of days from admission to first VRE positivity was a median of 8.5 (interquartile range, 2.7-15.0). During the 2 years, 213 patients were identified to be VRE-positive per clinical specimens with 95.5% of concurrent stool VRE, and 12.6% (27/213) were estimated to have acquired the infection from outside the hospital. This confirmed that the VRE inflow was continuous, but not transient or resembling an outbreak on one point.
Conclusion: The inflow of VRE was steady in a tertiary hospital with an average infection control policy in South Korea and should be a further target for VRE control.
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KEYWORD
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Active surveillance, Infection control, Risk factor, Vancomycin-resistant enterococci (VRE)
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