Highlights
- •SN coating reduced the bioburden on both low and high contamination surfaces.
- •Effect of SN coating on environmental surfaces becomes more prominent with time.
- •Isolation of Acinetobacter species from SN coated surfaces was significantly reduced.
Abstract
Background
A nano-scale surface coating containing silicon nanoparticles (Bacterlon®) creates
a hydrophobic surface which prevents the growth of bacteria. Study objective was to
evaluate the performance of this silicon nano-coating in Sri Lankan healthcare setting.
Methods
This prospective study was conducted from September 2015 to December 2015 in an Intensive
Care Unit and a medical ward in Base Hospital Homagama and a bacteriology laboratory
in Medical Research Institute, Colombo, Sri Lanka. Silicon nanoparticle coating was
applied to 19 high touch surfaces from those three sites. During the follow-up period,
these test sites and non-coated control sites were used for routine work and were
cleaned routinely as per institute protocol. Swabbing was done for coated and non-coated
sites once a week for 12 weeks at unannounced times. Surfaces were categorized in
to low (≤10 CFU/cm2) and high (>10–99 CFU/cm2) contamination by Aerobic Bacterial Count (ABC) in non-coated sites at any given
time.
Results
In low and high contaminated surfaces, an improvement in the mean percentage bioburden
reduction from 36.18% to 50.16% was observed from 4th week to 12th week with silicon
nanoparticles and a significant reduction (p < 0.05) was seen in ABC in each of the coated surface compared with their non-coated
counterpart by the 12th week. The frequency of isolation of Acinetobacter spp. on coated surfaces had a significant reduction (p < 0.01).
Conclusion
Silicon nanoparticle coating demonstrates a significant reduction of the bacterial
bioburden in low and high contaminated surfaces for 12 weeks in a tropical healthcare
setting.
Keywords
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Article info
Publication history
Published online: July 16, 2019
Accepted:
June 26,
2019
Received in revised form:
June 26,
2019
Received:
April 17,
2019
Identification
Copyright
© 2019 Australasian College for Infection Prevention and Control. Published by Elsevier B.V. All rights reserved.
