Antibacterial effect of the essential oils from several medicinal plants on the growth of Escherichia coli in surimi of Hypophthalmichthys molitrix

Vahedi Sarrigani, Mahdieh (2017) Antibacterial effect of the essential oils from several medicinal plants on the growth of Escherichia coli in surimi of Hypophthalmichthys molitrix. Masters thesis, university of zabol.

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Abstract

Diseases caused by consumption of contaminated food with Escherichia coli are the most important related to general health. The aim of this study was to inhibition of Escherichia coli growth inoculated in Hypophthalmichthys molitrix surimi with using rosemary leaves essential oil. Plants essential oil extraction was carried with using Steam distilled water in Klevenger. Then, the essential oils of medicinal plants (Rosemary, Heracleum persicum, Pennyroyal, Chamomile and Teucrium polium) were evaluated by disk diffusion and microdilution. The essential oil of rosemary leaves has highest antibacterial properties. Then Surimi inoculated with E. coli (103 Log CFU/g) and treated with concentrations of 1, 2 and 3 μL/g essential oil of rosemary leaves and stored at 4 ° C. Chemical (PV, TBA and TVB-N) and microbial parameters (TVC, PTC and E. coli count) of surimi were measured at 0, 24, 72, 144, 216 and 288 hours. The results showed that chemical parameters increased during storage but this increase was less in treatments containing rosemary leaves essential oil. The count of E. coli showed that the treatment containing 3 μL/g had the greatest effect on inhibiting of bacterial growth. The TVC and PTC amount of essential oil treatments were lower than the other treatments. Therefore, Rosemary leaves essential oil can be used as an antibacterial natural additive in fish products.

Item Type: Thesis (Masters)
Uncontrolled Keywords: Essential oil, Medicinal plants, Escherichia coli, Surimi, Sensory evaluation
Subjects: S Agriculture > SH Aquaculture. Fisheries. Angling
Depositing User: Mrs najmeh khajeh
Date Deposited: 10 Apr 2018 07:22
Last Modified: 04 Mar 2019 05:34
URI: http://eprints.uoz.ac.ir/id/eprint/1960

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