In vitro modelling of simultaneous interactions of Listeria monocytogenes, Lactobacillus sakei, and Staphylococcus carnosus
Por:
Blanco-Lizarazo, Carla Maria, Sotelo-Diaz, Indira, Llorente-Bousquets, Adriana
Publicada:
1 feb 2016
Resumen:
The Jameson effect model describes suppression of microorganism growth
as being dependent on non-specific competition. This model was developed
for simultaneous growth in a liquid medium and microbial interactions
between Listeria monocytogenes, Lactobacillus sakei, and Staphylococcus
carnosus with addition of NaNO2 to mimic the manufacturing process of
salami for 48 h at 21A degrees C and then for 14 days at 17A degrees C.
L. monocytogenes in the presence of L. sakei was inhibited by 2.120 log
CFU/mL in the presence of NaNO2, and 1.146 log CFU/mL without NaNO2.
Inhibition of L. monocytogenes cocultured with S. carnosus was 2.248 log
CFU/mL at 48 h, but after 336 h was not significantly (p > 0.05)
different from L. monocytogenes in mono-culture. The interspecific
competition parameter (beta) < 1 indicated that the prevailing
competition in co-cultures was intraspecific. Differentiation between 2
bacterial species interactions can be applied for use in starter
cultures with pathogenic flora.
Filiaciones:
Blanco-Lizarazo, Carla Maria:
Univ La Sabana, Agroind Proc Res Grp, Fac Engn, Cundinamarca, Colombia
Sotelo-Diaz, Indira:
Univ La Sabana, Agroind Proc Res Grp, EICEA, La Sabana, Colombia
Llorente-Bousquets, Adriana:
Univ Nacl Autonoma Mexico, Fac Grad Studies Cuautitlan, Engn & Technol Dept, Mexico City 04510, DF, Mexico
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