TY - JOUR
T1 - Antimicrobial effects of chitosan and garlic against Salmonella spp., Escherichia coli O157:H7, and Listeria monocytogenes in hummus during storage at various temperatures
AU - Osaili, Tareq M.
AU - Al-Nabulsi, Anas A.
AU - Hasan, Fayeza
AU - Olaimat, Amin N.
AU - Taha, Sadi
AU - Ayyash, Mutamed
AU - Nazzal, Dima S.
AU - Savvaidis, Ioannis N.
AU - Obaid, Reyad S.
AU - Holley, Richard
N1 - Publisher Copyright:
© 2022 Institute of Food Technologists®
PY - 2022/2
Y1 - 2022/2
N2 - Abstract: The study aimed to evaluate the antimicrobial activity of 0.5 or 1% (w/w) chitosan and 1% (w/w) garlic against Salmonella spp., Escherichia coli O157:H7 and Listeria monocytogenes in hummus dip stored at 4, 10, or 25°C for 28, 21, or 7 days, respectively. In hummus without garlic, at all storage temperatures and storage periods, 0.5% chitosan decreased Salmonella spp., E. coli O157:H7, and L. monocytogenes by 0.9–2.3, 0.6–2.3, and 0.9–1.3 log CFU/g, respectively. In comparison, 1% chitosan decreased the numbers by 1.6–2.9, 1.4–2.7, and 1.3–1.8 log CFU/g, respectively. In hummus with 1% garlic, 0.5% chitosan decreased Salmonella spp., E. coli O157:H7, and L. monocytogenes by 0.7–2.5, 0.6–2.2, and 1.0–1.5 log CFU/g, respectively. Furthermore, 1% chitosan decreased the numbers by 1.6–2.8, 1.2–2.7, and 1.5–1.6 log CFU/g, respectively. With few exceptions, adding 1% garlic to hummus did not result in any significant reduction (at p < 0.05) in microbial numbers. The greatest decreases of Salmonella spp., E. coli O157:H7, and L. monocytogenes were 3.1, 3.6, and 2.9 log CFU/g with 1% chitosan held at 4°C for 28 days. The highest overall acceptability was for hummus with 0.5% chitosan + 1% garlic. Commercial use of chitosan is expected to help producers improve hummus safety. Practical Application: Hummus is consumed worldwide as a dip due to its taste and health benefits. Microbial safety of hummus can be enhanced by incorporating chitosan, derived from the natural polymer chitin, into the formulation. This enhanced recipe would be a bonus for producers and consumers alike.
AB - Abstract: The study aimed to evaluate the antimicrobial activity of 0.5 or 1% (w/w) chitosan and 1% (w/w) garlic against Salmonella spp., Escherichia coli O157:H7 and Listeria monocytogenes in hummus dip stored at 4, 10, or 25°C for 28, 21, or 7 days, respectively. In hummus without garlic, at all storage temperatures and storage periods, 0.5% chitosan decreased Salmonella spp., E. coli O157:H7, and L. monocytogenes by 0.9–2.3, 0.6–2.3, and 0.9–1.3 log CFU/g, respectively. In comparison, 1% chitosan decreased the numbers by 1.6–2.9, 1.4–2.7, and 1.3–1.8 log CFU/g, respectively. In hummus with 1% garlic, 0.5% chitosan decreased Salmonella spp., E. coli O157:H7, and L. monocytogenes by 0.7–2.5, 0.6–2.2, and 1.0–1.5 log CFU/g, respectively. Furthermore, 1% chitosan decreased the numbers by 1.6–2.8, 1.2–2.7, and 1.5–1.6 log CFU/g, respectively. With few exceptions, adding 1% garlic to hummus did not result in any significant reduction (at p < 0.05) in microbial numbers. The greatest decreases of Salmonella spp., E. coli O157:H7, and L. monocytogenes were 3.1, 3.6, and 2.9 log CFU/g with 1% chitosan held at 4°C for 28 days. The highest overall acceptability was for hummus with 0.5% chitosan + 1% garlic. Commercial use of chitosan is expected to help producers improve hummus safety. Practical Application: Hummus is consumed worldwide as a dip due to its taste and health benefits. Microbial safety of hummus can be enhanced by incorporating chitosan, derived from the natural polymer chitin, into the formulation. This enhanced recipe would be a bonus for producers and consumers alike.
KW - antimicrobial
KW - chickpea dip
KW - foodborne pathogens
KW - natural preservatives
KW - temperature abuse
UR - http://www.scopus.com/inward/record.url?scp=85122962136&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85122962136&partnerID=8YFLogxK
U2 - 10.1111/1750-3841.16025
DO - 10.1111/1750-3841.16025
M3 - Article
C2 - 35028936
AN - SCOPUS:85122962136
SN - 0022-1147
VL - 87
SP - 833
EP - 844
JO - Journal of Food Science
JF - Journal of Food Science
IS - 2
ER -