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2014 ; 34
(5
): 818-30
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Effects of surface material, ventilation, and human behavior on indirect contact
transmission risk of respiratory infection
#MMPMID24955468
Sze-To GN
; Yang Y
; Kwan JK
; Yu SC
; Chao CY
Risk Anal
2014[May]; 34
(5
): 818-30
PMID24955468
show ga
Infectious particles can be deposited on surfaces. Susceptible persons who
contacted these contaminated surfaces may transfer the pathogens to their mucous
membranes via hands, leading to a risk of respiratory infection. The exposure and
infection risk contributed by this transmission route depend on indoor surface
material, ventilation, and human behavior. In this study, quantitative infection
risk assessments were used to compare the significances of these factors. The
risks of three pathogens, influenza A virus, respiratory syncytial virus (RSV),
and rhinovirus, in an aircraft cabin and in a hospital ward were assessed.
Results showed that reducing the contact rate is relatively more effective than
increasing the ventilation rate to lower the infection risk. Nonfabric surface
materials were found to be much more favorable in the indirect contact
transmission for RSV and rhinovirus than fabric surface materials. In the cases
considered in this study, halving the ventilation rate and doubling the hand
contact rate to surfaces and the hand contact rate to mucous membranes would
increase the risk by 3.7-16.2%, 34.4-94.2%, and 24.1-117.7%, respectively.
Contacting contaminated nonfabric surfaces may pose an indirect contact risk up
to three orders of magnitude higher than that of contacting contaminated fabric
surfaces. These findings provide more consideration for infection control and
building environmental design.