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Inactivation of Listeria innocua in tryptic soy broth and poultry meat samples by high pressure processing

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Ferrante, S. | Cruz, Christian | Largeteau, Alain | Santoro, A. | Sarli, T. A. | Demazeau, Gérard | El Moueffak, Abdelhamid

Edité par CCSD ; Taylor & Francis -

International audience. Efficiency of high-pressure processing (HP) on the inactivation of Listeria innocua (ATTC 33090) suspensions in culture medium or inoculated into poultry samples was studied. First, the baroresistance of L. innocua in a tryptic soy broth suspension at a concentration of 108-109 Colony forming units (CFU)/ml was tested under varying cycles of pressurization in the range of 200-350 MPa (15 min total in each treatment) at 4 °C. In addition, the effect of HP on L. innocua inoculated in poultry (103 or 105/CFU/g) was examined. The results of these studies demonstrate the requisite treatment conditions and efficacy of pressure cycles in destroying L. innocua in poultry.

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