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Article: Physical factors that affect microbial transfer during surface touch

TitlePhysical factors that affect microbial transfer during surface touch
Authors
KeywordsSurface touch
Bacteria
Fingerpad
Transfer rate
Physical factors
Issue Date2019
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/buildenv
Citation
Building and Environment, 2019, v. 158, p. 28-38 How to Cite?
AbstractKnowledge of the factors that affect microbial transfer during surface touch is essential for controlling the risk of infection by fomite transmission. Thirteen factors that affect the microbial transfer rate were identified by reviewing the published data. Principal component analysis was performed. Stepwise multiple linear regression revealed donor wetness, microbial transfer direction, donor roughness and existence of rubbing to be the most significant factors. The transfer rate during surface touch was newly measured using a purpose-made touch machine. The microbial transfer rate was quantified by polymerase chain reaction. In addition to the four significant factors determined by data analysis, five other factors were investigated, including three that have received wide attention (surface material, bacterial species and touch force) and two that were recently found to be significant (bacterial suspension medium and bacterial growth phase). The relative standard deviation of the measured transfer rate was reduced to 35.6%. The average metal-to-fingerpad transfer rate of Staphylococcus aureus was 15.6% in the baseline condition. It increased to more than 35% under positive conditions such as rubbing during the touch and decreased to less than 5% when water was used as the bacterial suspension medium. Furthermore, the transfer rate increased with a decrease in the donor roughness or an increase in the touch force. No significant difference was observed when the metal surface was replaced with glass and quartz or between the S. aureus and Escherichia coli experiments. These results offer insights into the factors that affect microbial transfer during surface touch.
Persistent Identifierhttp://hdl.handle.net/10722/278126
ISSN
2023 Impact Factor: 7.1
2023 SCImago Journal Rankings: 1.647
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorZHAO, P-
dc.contributor.authorCHAN, PT-
dc.contributor.authorGao, Y-
dc.contributor.authorLai, HW-
dc.contributor.authorZhang, T-
dc.contributor.authorLi, Y-
dc.date.accessioned2019-10-04T08:07:59Z-
dc.date.available2019-10-04T08:07:59Z-
dc.date.issued2019-
dc.identifier.citationBuilding and Environment, 2019, v. 158, p. 28-38-
dc.identifier.issn0360-1323-
dc.identifier.urihttp://hdl.handle.net/10722/278126-
dc.description.abstractKnowledge of the factors that affect microbial transfer during surface touch is essential for controlling the risk of infection by fomite transmission. Thirteen factors that affect the microbial transfer rate were identified by reviewing the published data. Principal component analysis was performed. Stepwise multiple linear regression revealed donor wetness, microbial transfer direction, donor roughness and existence of rubbing to be the most significant factors. The transfer rate during surface touch was newly measured using a purpose-made touch machine. The microbial transfer rate was quantified by polymerase chain reaction. In addition to the four significant factors determined by data analysis, five other factors were investigated, including three that have received wide attention (surface material, bacterial species and touch force) and two that were recently found to be significant (bacterial suspension medium and bacterial growth phase). The relative standard deviation of the measured transfer rate was reduced to 35.6%. The average metal-to-fingerpad transfer rate of Staphylococcus aureus was 15.6% in the baseline condition. It increased to more than 35% under positive conditions such as rubbing during the touch and decreased to less than 5% when water was used as the bacterial suspension medium. Furthermore, the transfer rate increased with a decrease in the donor roughness or an increase in the touch force. No significant difference was observed when the metal surface was replaced with glass and quartz or between the S. aureus and Escherichia coli experiments. These results offer insights into the factors that affect microbial transfer during surface touch.-
dc.languageeng-
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/buildenv-
dc.relation.ispartofBuilding and Environment-
dc.subjectSurface touch-
dc.subjectBacteria-
dc.subjectFingerpad-
dc.subjectTransfer rate-
dc.subjectPhysical factors-
dc.titlePhysical factors that affect microbial transfer during surface touch-
dc.typeArticle-
dc.identifier.emailZhang, T: zhangt@hkucc.hku.hk-
dc.identifier.emailLi, Y: liyg@hku.hk-
dc.identifier.authorityZhang, T=rp00211-
dc.identifier.authorityLi, Y=rp00151-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.buildenv.2019.05.005-
dc.identifier.scopuseid_2-s2.0-85065387027-
dc.identifier.hkuros306616-
dc.identifier.hkuros319435-
dc.identifier.volume158-
dc.identifier.spage28-
dc.identifier.epage38-
dc.identifier.isiWOS:000468894500003-
dc.publisher.placeUnited Kingdom-
dc.identifier.issnl0360-1323-

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