Effect of liposome-encapsulated nisin and bacteriocin-like substance P34 on Listeria monocytogenes growth in Minas frescal cheese.
Int J Food Microbiol
; 156(3): 272-7, 2012 Jun 01.
Article
in En
| MEDLINE
| ID: mdl-22554928
ABSTRACT
The efficacy of liposome-encapsulated nisin and bacteriocin-like substance (BLS) P34 to control growth of Listeria monocytogenes in Minas frescal cheese was investigated. Nisin and BLS P34 were encapsulated in partially purified soybean phosphatidylcholine (PC-1) and PC-1-cholesterol (73) liposomes. PC-1 nanovesicles were previously characterized. PC-1-cholesterol encapsulated nisin and BLS P34 presented, respectively, 218 nm and 158 nm diameters, zeta potential of -64 mV and -53 mV, and entrapment efficiency of 88.9% and 100%. All treatments reduced the population of L. monocytogenes compared to the control during 21 days of storage of Minas frescal cheese at 7°C. However, nisin and BLS P34 encapsulated in PC-1-cholesterol liposomes were less efficient in controlling L. monocytogenes growth in comparison with free and PC-1 liposome-encapsulated bacteriocins. The highest inhibitory effect was observed for nisin and BLS P34 encapsulated in PC-1 liposomes after 10 days of storage of the product. The encapsulation of bacteriocins in liposomes of partially purified soybean phosphatidylcholine may be a promising technology for the control of foodborne pathogens in cheeses.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Bacteriocins
/
Food Contamination
/
Cheese
/
Listeria monocytogenes
/
Nisin
Language:
En
Journal:
Int J Food Microbiol
Journal subject:
CIENCIAS DA NUTRICAO
/
MICROBIOLOGIA
Year:
2012
Document type:
Article
Affiliation country:
Brazil