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Abstract Title:

Black cardamom essential oil preventsO157:H7 andTyphimurium JSG 1748 biofilm formation through inhibition of quorum sensing.

Abstract Source:

J Food Sci Technol. 2021 Aug ;58(8):3183-3191. Epub 2020 Oct 1. PMID: 34294980

Abstract Author(s):

Abdullah, Ammar Algburi, Ali Asghar, Qingrong Huang, Warda Mustfa, Hafiz U Javed, Saskia Zehm, Michael L Chikindas

Article Affiliation:

Abdullah

Abstract:

This study aimed to investigate the chemical composition, using GC-MS, and anti-biofilm potential of black cardamom essential oil (BCEO) against biofilms ofO157:H7 andTyphimurium JSG 1748 through inhibition of bacterial quorum sensing. GC-MS quantification demonstrated that BCEO contains 1,8-cineole (44.24%),-terpinyl acetate (12.25%), nerolidol (6.03%), and sabinene (5.96%) as the major bioactive compounds. Antioxidant assays for BCEO revealed the total phenolic and flavonoid mean values were 1325.03 ± 7.69 mg GAE 100/g and 168.25 ± 5.26 mg CE/g, respectively. In regards to antimicrobial potential,was the most sensitive species compared to,,,andTyphimurium with the following zones of inhibition; 14.4 ± 0.52, 13.2 ± 0.42, 11.2 ± 0.28, 11.0 ± 0.52, 8.2 ± 0.24 and 6.6 ± 0.18 mm in diameter, respectively. Biofilm inhibition by BCEO was concentration-dependent, when various concentrations of 0.03, 0.06, 0.12, 0.25 and 0.5% were applied, 33.67, 34.14, 38.66, 46.65 and 50.17% ofTyphimurium biofilm was inhibited, while 47.31, 54.15, 76.57, 83.36 and 84.63% ofbiofilm formation was prevented.ATCC 12,472 and its product violacein, was used as a microbial indicator for enhancement or inhibition of quorum sensing. Our data showed that 0.5% of BCEO inhibited violacein production without influencing the growth ofwhile 1% of BCEO, caused 100% inhibtion of violacein production together with 30% inhibition of growth. This study shows that BCEO possesses promising antioxidant and antimicrobial potential, and found anti-biofilm activities linked to the quenching of the quorum sensing system ofandTyphimurium.

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