Computer keyboard covers impregnated with a novel antimicrobial polymer significantly reduce microbial contamination.

Abstract:

BACKGROUND:Contaminated computer keyboards have been acknowledged as a potential source for bacterial transmission between health care providers and patients. Biosafe HM 4100 is an antimicrobial polymer that can be incorporated into the polyurethane material used to make keyboard covers. This study aimed to determine whether plastic keyboard covers containing HM 4100 effectively minimize the survival of bacterial species commonly present on health care environmental surfaces. METHODS:Polyurethane material that contained 0.5% HM 4100, 1% HM 4100, and 1% HM 4100 with spray coating of 1% HM 4100 were tested. In 2 separate experiments, the surfaces of test materials were inoculated with suspensions of methicillin-resistant Staphylococcus aureus (MRSA), vancomycin-resistant Enterococcus faecalis (VREF), Escherichia coli, or Pseudomonas aeruginosa. Viability was assessed on the materials at 0, 10, 30, 60, 120, and 240 minutes after inoculation. RESULTS:Maximum reductions in viability were observed for all 4 organisms at the longest tested time period on each test material. Mean reductions on the 0.5% HM 4100 material at 240 minutes were 99.99% for E coli, 97.8% for MRSA, 95.0% for VREF, and 92.1% for P aeruginosa. Mean reductions on the 1% HM 4100 at 120 minutes were 99.9% for VREF, 99.9% for MRSA, 99.9% for P aeruginosa, and 99.5% for E coli. Mean reductions on the 1% HM 4100 plus spray coating at 30 minutes were 99.9% for E coli, 99.8% for VREF, 98.8% for P aeruginosa, and 97.2% for MRSA. CONCLUSIONS:Incorporation of the HM 4100 antimicrobial polymer into polyurethane keyboard material may reduce the hand carriage of bacteria between health care providers and patients.

journal_name

Am J Infect Control

authors

D'Antonio NN,Rihs JD,Stout JE,Yu VL

doi

10.1016/j.ajic.2012.03.030

subject

Has Abstract

pub_date

2013-04-01 00:00:00

pages

337-9

issue

4

eissn

0196-6553

issn

1527-3296

pii

S0196-6553(12)00792-4

journal_volume

41

pub_type

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