Inhibition of Listeria monocytogenes and Salmonella by natural antimicrobials and high hydrostatic pressure in sliced cooked ham.
The effectiveness of nisin, lactate salts, and high hydrostatic pressure to inhibit the growth of Listeria monocytogenes and Salmonella in sliced cooked ham was studied through a combination of PCR-based detection methods, most probable number, and classical microbial enumeration techniques (International Organization for Standardization protocols). A synergistic effect to inhibit a cocktail of Listeria monocytogenes CTC1010, CTC1011, and CTC1034 was observed between potassium lactate, high hydrostatic pressure (400 MPa, 17 degrees C, 10 min), and low storage temperature when sliced cooked ham was stored for 84 days at 1 degrees C. The high hydrostatic pressure treatment also proved to be useful to inhibit a cocktail of Salmonella enterica serotypes London CTC1003, Schwarzengrund CTC1015, and Derby CTC1022.
Aymerich
Teresa
T
Institute for Food Research and Technology (IRTA), Meat Technology Center, Granja Camps i Armet, E-17121 Monells (Girona), Spain. teresa.aymerich@irta.es
Jofré
Anna
A
Garriga
Margarita
M
Hugas
Marta
M
D000818:Animals; D015169:Colony Count, Microbial; D005519:Food Preservation / Q000379:methods; D006801:Humans; D006874:Hydrostatic Pressure; D007773:Lactates / Q000494:pharmacology*; D008089:Listeria monocytogenes / Q000254:growth & development*; D008461:Meat Products / Q000382:microbiology*; D009561:Nisin / Q000494:pharmacology*; D012475:Salmonella / Q000254:growth & development*; D013552:Swine; D013696:Temperature; D013997:Time Factors
D007773:Lactates; D009561:Nisin