Abstract
Nonthermal technologies are being investigated as viable alternatives to, or supplemental utilization, with thermal pasteurization in the food-processing industry. In this study, the effect of ultraviolet (UV)-C light on the inactivation of seven milkborne pathogens (Listeria monocytogenes, Serratia marcescens, Salmonella Senftenberg, Yersinia enterocolitica, Aeromonas hydrophila, Escherichia coli, and Staphylococcus aureus) was evaluated. The pathogens were suspended in ultra-high-temperature whole milk and treated at UV doses between 0 and 5000J/L at a flow rate of 4300L/h in a thin-film turbulent flow-through pilot system. Of the seven milkborne pathogens tested, L. monocytogenes was the most UV resistant, requiring 2000J/L of UV-C exposure to reach a 5-log reduction. The most sensitive bacterium was S. aureus, requiring only 1450J/L to reach a 5-log reduction. This study demonstrated that the survival curves were nonlinear. Sigmoidal inactivation curves were observed for all tested bacterial strains. Nonlinear modeling of the inactivation data was a better fit than the traditional log-linear approach. Results obtained from this study indicate that UV illumination has the potential to be used as a nonthermal method to reduce microorganism populations in milk.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 506-513 |
| Number of pages | 8 |
| Journal | Foodborne Pathogens and Disease |
| Volume | 12 |
| Issue number | 6 |
| DOIs | |
| State | Published - Jun 1 2015 |
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ASJC Scopus subject areas
- Microbiology
- Applied Microbiology and Biotechnology
- Food Science
- Animal Science and Zoology
Cite this
Efficacy of ultraviolet (uv-c) light in a thin-film turbulent flow for the reduction of milkborne pathogens. / Crook, Jennifer A.; Rossitto, Paul V.; Parko, Jared; Koutchma, Tatiana; Cullor, James S.
In: Foodborne Pathogens and Disease, Vol. 12, No. 6, 01.06.2015, p. 506-513.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Efficacy of ultraviolet (uv-c) light in a thin-film turbulent flow for the reduction of milkborne pathogens
AU - Crook, Jennifer A.
AU - Rossitto, Paul V.
AU - Parko, Jared
AU - Koutchma, Tatiana
AU - Cullor, James S
PY - 2015/6/1
Y1 - 2015/6/1
N2 - Nonthermal technologies are being investigated as viable alternatives to, or supplemental utilization, with thermal pasteurization in the food-processing industry. In this study, the effect of ultraviolet (UV)-C light on the inactivation of seven milkborne pathogens (Listeria monocytogenes, Serratia marcescens, Salmonella Senftenberg, Yersinia enterocolitica, Aeromonas hydrophila, Escherichia coli, and Staphylococcus aureus) was evaluated. The pathogens were suspended in ultra-high-temperature whole milk and treated at UV doses between 0 and 5000J/L at a flow rate of 4300L/h in a thin-film turbulent flow-through pilot system. Of the seven milkborne pathogens tested, L. monocytogenes was the most UV resistant, requiring 2000J/L of UV-C exposure to reach a 5-log reduction. The most sensitive bacterium was S. aureus, requiring only 1450J/L to reach a 5-log reduction. This study demonstrated that the survival curves were nonlinear. Sigmoidal inactivation curves were observed for all tested bacterial strains. Nonlinear modeling of the inactivation data was a better fit than the traditional log-linear approach. Results obtained from this study indicate that UV illumination has the potential to be used as a nonthermal method to reduce microorganism populations in milk.
AB - Nonthermal technologies are being investigated as viable alternatives to, or supplemental utilization, with thermal pasteurization in the food-processing industry. In this study, the effect of ultraviolet (UV)-C light on the inactivation of seven milkborne pathogens (Listeria monocytogenes, Serratia marcescens, Salmonella Senftenberg, Yersinia enterocolitica, Aeromonas hydrophila, Escherichia coli, and Staphylococcus aureus) was evaluated. The pathogens were suspended in ultra-high-temperature whole milk and treated at UV doses between 0 and 5000J/L at a flow rate of 4300L/h in a thin-film turbulent flow-through pilot system. Of the seven milkborne pathogens tested, L. monocytogenes was the most UV resistant, requiring 2000J/L of UV-C exposure to reach a 5-log reduction. The most sensitive bacterium was S. aureus, requiring only 1450J/L to reach a 5-log reduction. This study demonstrated that the survival curves were nonlinear. Sigmoidal inactivation curves were observed for all tested bacterial strains. Nonlinear modeling of the inactivation data was a better fit than the traditional log-linear approach. Results obtained from this study indicate that UV illumination has the potential to be used as a nonthermal method to reduce microorganism populations in milk.
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UR - http://www.scopus.com/inward/citedby.url?scp=84931054714&partnerID=8YFLogxK
U2 - 10.1089/fpd.2014.1843
DO - 10.1089/fpd.2014.1843
M3 - Article
C2 - 25884367
AN - SCOPUS:84931054714
VL - 12
SP - 506
EP - 513
JO - Foodborne Pathogens and Disease
JF - Foodborne Pathogens and Disease
SN - 1535-3141
IS - 6
ER -