An Overview of the Options for Antimicrobial Hard Surfaces in Hospitals - Use of Biocidal Surfaces for Reduction of Healthcare Acquired Infections - page 150

Table 7.2 (continued)
Author/
year

Antimicrobial
surface Location Setting Design Sampling schedule Findings Comment

to each organosilane, and
three control rooms

plates prior to daily
cleaning

observed in control
rooms; counts were
significantly lower in
control room for 3/9 sites

similar if a 'hygiene fail'
approach had been taken

Thom
2014
[ 103 ]

Baltimore,
Maryland,
USA

Ten bed
surgical
ICU

Organosilane Prospective intervention

study. Five rooms treated
with organosilane, five
rooms left untreated

Standardised sites sampled
twice weekly for all
rooms (when the
occupant had
stayed > 24 h)

No significant difference in
the proportion of rooms
contaminated with
bacteria (90 % treated
room vs. 83 % untreated
rooms)

Sampling methods were not
quantitative. No
significant difference in
the proportion of rooms
contaminated with
individual pathogens
of interest

Hedin
2010
[ 69 ]

Falun, Sweden Infectious

diseases
ward

PHMB + active
polymer

Prospective observational
study. Twelve bedside
tables; half of each table
treated with PHMB
polymer, half left
untreated

Treated and untreated sides
of the tables sampled
1 day after application.
Experiment repeated
three times over three
consecutive weeks

Two of three sampling
methods showed a
significant reduction
associated with PHMB
polymer; 50 % reduction
in median counts

Tables were not cleaned
during the study. Three
different sampling
methods were compared

Decraene
2008
[ 74 ]

London, UK Dental clinic Cellulose acetate

coating
+ photosensitsers

Prospective observational
study. Cellulose acetone
coatings with and without
photosensitisers
(toluidine blue O and
rose bengal)

Open agar plates and petri
dishes with control and
test coatings placed on a
shelf adjacent to dental
chairs and exposed to the
air for 24 h

Significant median 64 %
reduction in aerobic
bacteria and 82 %
reduction in anaerobic
bacteria on the test
coatings vs. control

Required illumination by a
lamp. Similar
concentration of aerobes
cultured from agar plates
and the treated surfaces