Title of article :
Emergence of pulsed electric fields resistance in Salmonella enterica serovar Typhimurium SL1344
Author/Authors :
Sagarzazu، نويسنده , , N. and Cebriلn، نويسنده , , G. and Pagلn، نويسنده , , R. and Condَn، نويسنده , , S. and Maٌas، نويسنده , , P.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2013
Pages :
7
From page :
219
To page :
225
Abstract :
In this investigation we selected and isolated a culture derived from Salmonella enterica serovar Typhimurium SL1344 with stable increased resistance to pulsed electric fields (PEF) after repeated rounds of PEF treatment and outgrowth of survivors. The resulting culture showed a higher resistance to PEF treatments under different treatment conditions. The acquisition of PEF resistance was only observed in stationary phase cells. The cytoplasmic membrane of the resistant variant showed a higher resilience against PEF treatments, since a lower permeabilization degree was observed after PEF treatments, in comparison to the parental strain. Resistance to PEF was also accompanied by a higher tolerance to acidic pH, hydrogen peroxide and ethanol, but not to heat. The occurrence of a PEF resistant variant in S. enterica serovar Typhimurium SL1344 emphasizes the need to further study the mechanisms of inactivation and resistance by PEF for an adequate design of safe treatments.
Keywords :
pulsed electric fields (PEF) , Resistant variant , Salmonella typhimurium
Journal title :
International Journal of Food Microbiology
Serial Year :
2013
Journal title :
International Journal of Food Microbiology
Record number :
2118369
Link To Document :
بازگشت