A study published in the Journal of Food Science shows that extracts from pecan shells may be effective at protecting meats from Listeria growth.
A study published in the Journal of Food Science shows that extracts from pecan shells may be effective at protecting meats from Listeria
growth. Growers and processors of USDA certified organic foods are in
need of suitable organic antimicrobials. In this study, the researchers
wanted to develop and test natural antimicrobials derived from an
all-natural by-product, organic pecan shells.
Unroasted and roasted organic pecan shells were subjected to
solvent-free extraction to produce antimicrobials that were tested
against Listeria spp. and L. monocytogenes serotypes
to determine the minimum inhibitory concentrations (MIC) of
antimicrobials. The effectiveness of pecan shell extracts were further
tested using a poultry skin model system and the growth inhibition of
the Listeria cells adhered onto the skin model were quantified.
The researchers found that the solvent-free extracts of pecan shells inhibited Listeria
strains at MICs as low as 0.38%. The antimicrobial effectiveness tests
on a poultry skin model exhibited nearly a 2 log reduction of the
inoculated cocktail mix of Listeria strains when extracts of
pecan shell powder were used. The extracts also produced greater than a
4 log reduction of the indigenous spoilage bacteria on the chicken
The researchers concluded that “pecan shell extracts may prove to be
very effective alternative antimicrobials against food pathogens and
supplement the demand for effective natural antimicrobials for use in
organic meat processing.”