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Bacterial Contamination of Hemodialysis Devices in Hospital Dialysis Wards

Published on Feb 15, 2019in The Journal of Medical Investigation
· DOI :10.2152/jmi.66.148
Takaaki Shimohata9
Estimated H-index: 9
(University of Tokushima),
Kazuaki Mawatari16
Estimated H-index: 16
(University of Tokushima)
+ 22 AuthorsAkira Takahashi33
Estimated H-index: 33
(University of Tokushima)
Abstract
Chronic care patients undergoing hemodialysis for treatment of end-stage renal failure experience higher rates of bloodstream-associated infection due to the patients' compromised immune system and management of the bloodstream through catheters. Staphylococcus species are a common cause of hemodialysis catheter-related bloodstream infections. We investigated environmental bacterial contamination of dialysis wards and contamination of hemodialysis devices to determine the source of bacteria for these infections. All bacterial samples were collected by the swab method and the agarose stamp method. And which bacterium were identified by BBL CRYSTAL Kit or 16s rRNA sequences. In our data, bacterial cell number of hemodialysis device was lower than environment of patient surrounds. But Staphylococcus spp. were found predominantly on the hemodialysis device (46.8%), especially on areas frequently touched by healthcare-workers (such as Touch screen). Among Staphylococcus spp., Staphylococcus epidermidis was most frequently observed (42.1% of Staphylococcus spp.), and more surprising, 48.2% of the Staphylococcus spp. indicated high resistance for methicillin. Our finding suggests that hemodialysis device highly contaminated with bloodstream infection associated bacteria. This study can be used as a source to assess the risk of contamination-related infection and to develop the cleaning system for the better prevention for bloodstream infections in patients with hemodialysis.
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The role of environment in the spread of nosocomial infection has been acknowledged. One way to control the spread of infection is to control and monitor patient environments to prevent transmission. Studies applying the suggested aerobic colony count standards to monitor environmental contamination were undertaken over an 18-month period at both a London pediatric hospital and in adult intensive care units. The resulting data demonstrate that a large proportion of sites screened for bacterial c...
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