Article

Inactivation of Listeria monocytogenes in brine and saline by alternating high-voltage pulsed current.

Department of Medical Engineering, Yonsei University College of Medicine, Seoul, Korea.
Journal of Microbiology and Biotechnology (impact factor: 1.38). 08/2008; 18(7):1274-7.
Source: PubMed

ABSTRACT The inactivating efficiency of alternating high-voltage pulsed (AHVP) current was investigated in brine (20 w/v% NaCl) and saline (0.9 w/v% NaCl) inoculated with 1x 10(7) cells/ml of Listeria monocytogenes. AHVP current at 12 V with 1 pulse completely inactivated L. monocytogenes in brine within 3 ms, while the bacteria in saline were fully inactivated by 10-pulsed electric treatment at 12 V within the same time. Electron microscopic observation demonstrated substantial structural damage of electrically treated L. monocytogenes in brine. These results suggest that AHVP treatment would be effective for the rapid and complete inactivation of L. monocytogenes in brine or saline solution.

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Keywords

1 pulse
 
10-pulsed electric treatment
 
AHVP treatment
 
alternating high-voltage pulsed
 
bacteria
 
complete inactivation
 
Electron microscopic observation
 
inactivating efficiency
 
L. monocytogenes
 
Listeria monocytogenes
 
substantial structural damage