This study evaluated the potential of using laser-textured metal surfaces (etched coupons) designed and manufactured using an ultrafast laser to prevent bacterial attachment. The etched and unetched surfaces were compared for bacterial attachment against Escherichia coli AGR5151 and Brochothrix thermosphacta NZRM 3320 at high (∼8 Log colony-forming unit (CFU)/coupon) and low (∼5 Log CFU/coupon) inoculum levels. For B. thermosphacta, one out of the five etched surfaces showed significantly (p < 0.05) lower attachment by 0.2–1.3 Log CFU/coupon using the high inoculum, whereas four out of five etched surfaces exhibited significantly (p < 0.05) reduced attachment compared to the control with the lower inoculum. Similarly, for E. coli, three surfaces demonstrated significantly (p < 0.05) lower attachment by 0.7–1.2 Log CFU/coupon with the high inoculum and four surfaces showed lower attachment by 0.1–1.4 Log CFU/coupon compared to the control with the lower inoculum. Only one type of etched surface/coupon was common in its ability to reduce attachment for both the bacteria tested. It can be concluded that the bacterial strain being targeted can be one of the major factors that determine the efficacy of these surfaces to inhibit attachment. The findings also suggest a potential link between effectiveness and surface characteristics like roughness and wettability.
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Antibacterial effectiveness of laser surface textured metal on meat-borne bacteria
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February 2025
Research Article|
February 25 2025
Antibacterial effectiveness of laser surface textured metal on meat-borne bacteria
Aswathi Soni
;
Aswathi Soni
(Formal analysis, Investigation, Methodology, Visualization, Writing – original draft)
1
Food System Integrity, Smart Foods and Bioproducts, AgResearch Ltd., Hopkirk Research Institute, Massey University
, Cnr University Ave and Library Road, Palmerston North 4442, New Zealand
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Amanda Gardner
;
Amanda Gardner
(Formal analysis, Investigation, Methodology, Writing – review & editing)
1
Food System Integrity, Smart Foods and Bioproducts, AgResearch Ltd., Hopkirk Research Institute, Massey University
, Cnr University Ave and Library Road, Palmerston North 4442, New Zealand
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Gale Brightwell
;
Gale Brightwell
(Conceptualization, Funding acquisition, Methodology, Writing – review & editing)
1
Food System Integrity, Smart Foods and Bioproducts, AgResearch Ltd., Hopkirk Research Institute, Massey University
, Cnr University Ave and Library Road, Palmerston North 4442, New Zealand
2
New Zealand Food Safety Science and Research Centre, Massey University Manawatu (Turitea)
, Tennent Drive, Palmerston North 4474, New Zealand
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Lan Le-Ngoc
;
Lan Le-Ngoc
(Investigation)
3
Applied Technologies Group
, Callaghan Innovation, Gracefield Innovation Quarter, 69 Gracefield Road, Lower Hutt 5040, New Zealand
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Sebastiampillai Raymond
Sebastiampillai Raymond
a)
(Conceptualization, Formal analysis, Funding acquisition, Investigation, Writing – review & editing)
3
Applied Technologies Group
, Callaghan Innovation, Gracefield Innovation Quarter, 69 Gracefield Road, Lower Hutt 5040, New Zealand
a)Author to whom correspondence should be addressed; electronic mail: [email protected]
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a)Author to whom correspondence should be addressed; electronic mail: [email protected]
J. Laser Appl. 37, 012042 (2025)
Article history
Received:
June 13 2024
Accepted:
January 14 2025
Citation
Aswathi Soni, Amanda Gardner, Gale Brightwell, Lan Le-Ngoc, Sebastiampillai Raymond; Antibacterial effectiveness of laser surface textured metal on meat-borne bacteria. J. Laser Appl. 1 February 2025; 37 (1): 012042. https://doi.org/10.2351/7.0001535
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