TITLE:
Antimicrobial Effects of Berries on Listeria monocytogenes
AUTHORS:
Elisaveta Sandulachi, Daniela Cojocari, Greta Balan, Liliana Popescu, Aliona Ghendov-Moșanu, Rodica Sturza
KEYWORDS:
L. monocitogenes, Berries, Kirby-Bauer Test, Minimum Inhibitory Concentration (MIC), Minimum Bactericidal Concentration (MBC)
JOURNAL NAME:
Food and Nutrition Sciences,
Vol.11 No.9,
September
21,
2020
ABSTRACT: The purpose of this study was to first evaluate the
antimicrobial effects of powder and extracts of berries (rose-hip, aronia, sea
buckthorn and hawthorn) on the development of antibiotic-resistant L. monocitogenes. Listeria monocytogenes is considered one of the most important pathogens
responsible for food-borne infection. Antimicrobial properties were evaluated
using the standard Kirby-Bauer disk diffusion method. Bacterial inactivation
networks were determined and compared, as well as the possibility of using
powders and extracts of berries to control the risk of Listeria monocytogees infestation in the milk and dairy industry as well as in the meat industry. The
effect of pH (4.78 - 4.43) and water activity (0.90 - 0.80) on the relationship
between optical density (OD) at 600 nm and the plate count (CFU ml-1)
was investigated for Listeria monocytogenes. It was determined Minimum
Inhibitory Concentration (MIC), Minimum Bactericidal Concentration (MBC) of berries for L.
monocytogenes. The most relevant
bacteriostatic and bactericidal effect
on L. monocytogenes in the tested
berries demonstrated sea buckthorn and rosehip.