Infrared Heat Treatment for Inactivation of Staphylococcus aureus

Kathiravan Krishnamurthy, Soo Jin Jun, Joseph Irudayaraj, Ali Demirci

Research output: Contribution to conferencePaper

Abstract

The efficacy of infrared heating for inactivation of Staphylococcus aureus, a pathogenic microorganism, in milk was studied to investigate the potential of this technology for milk pasteurization. S. aureus population was reduced from 0.10 to 8.41 log 10 CFU/ml, depending upon the treatment conditions. The effects of infrared lamp temperature (536, 619°C), volume of the treated milk sample (3, 5, and 7 ml), and treatment time (1, 2, and 4 min) were found to be statistically significant (p<0.05). Complete inactivation of S. aureus was obtained in two cases within 4 min at a 619°C lamp temperature, resulting in 8.41 log 10 CFU/ml reduction. Enrichment resulted in growth as some of the injured cells were able to repair. Further investigation of infrared heat treatment for longer treatment times (> 4 min) indicated that there was no growth observed following enrichment in most cases for treatment at a 619°C lamp temperature. The results demonstrated that infrared heating has an excellent potential for effective inactivation of S. aureus in milk. Further optimization of the process may result in a commercially successful milk pasteurization method.

Original languageEnglish (US)
StatePublished - Nov 7 2007
Event2007 ASABE Annual International Meeting, Technical Papers - Minneapolis, MN, United States
Duration: Jun 17 2007Jun 20 2007

Other

Other2007 ASABE Annual International Meeting, Technical Papers
CountryUnited States
CityMinneapolis, MN
Period6/17/076/20/07

Fingerprint

Staphylococcus aureus
inactivation
Milk
Hot Temperature
Heat treatment
heat treatment
Infrared radiation
milk
Infrared heating
Pasteurization
pasteurization
Heating
Infrared lamps
heat
Temperature
Electric lamps
Microorganisms
temperature
Technology
microorganisms

All Science Journal Classification (ASJC) codes

  • Agricultural and Biological Sciences(all)
  • Engineering(all)

Cite this

Krishnamurthy, K., Jun, S. J., Irudayaraj, J., & Demirci, A. (2007). Infrared Heat Treatment for Inactivation of Staphylococcus aureus. Paper presented at 2007 ASABE Annual International Meeting, Technical Papers, Minneapolis, MN, United States.
Krishnamurthy, Kathiravan ; Jun, Soo Jin ; Irudayaraj, Joseph ; Demirci, Ali. / Infrared Heat Treatment for Inactivation of Staphylococcus aureus. Paper presented at 2007 ASABE Annual International Meeting, Technical Papers, Minneapolis, MN, United States.
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Krishnamurthy, K, Jun, SJ, Irudayaraj, J & Demirci, A 2007, 'Infrared Heat Treatment for Inactivation of Staphylococcus aureus', Paper presented at 2007 ASABE Annual International Meeting, Technical Papers, Minneapolis, MN, United States, 6/17/07 - 6/20/07.

Infrared Heat Treatment for Inactivation of Staphylococcus aureus. / Krishnamurthy, Kathiravan; Jun, Soo Jin; Irudayaraj, Joseph; Demirci, Ali.

2007. Paper presented at 2007 ASABE Annual International Meeting, Technical Papers, Minneapolis, MN, United States.

Research output: Contribution to conferencePaper

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AU - Jun, Soo Jin

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Krishnamurthy K, Jun SJ, Irudayaraj J, Demirci A. Infrared Heat Treatment for Inactivation of Staphylococcus aureus. 2007. Paper presented at 2007 ASABE Annual International Meeting, Technical Papers, Minneapolis, MN, United States.