Antimicrobial activities of essential oils against Escherichia coli and Salmonella spp

Tan, Ee Wen (2020) Antimicrobial activities of essential oils against Escherichia coli and Salmonella spp. [Project Paper] (Submitted)

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Abstract

Imprudent use of antimicrobial agents has caused the emergence of multiple antimicrobial resistance bacteria, posing a threat to both the public health and veterinary sectors. This urged the search of alternative antimicrobial sources to preserve the commercial antibiotics efficacy. Natural herbal extracts such as plant's essential oils that exhibit antimicrobial activity have sparked many interests. In this project, the antibacterial activities of essential oils of oregano, thyme, and cinnamon were studied. Different concentrations of the essential oils were tested for antibacterial activities against 15 field isolates of Escherichia coli and Salmonella spp. from broiler chickens respectively using the disc diffusion method. Six different classes of commercial antibiotics were chosen to be tested for their sensitivity against the clinical isolates. Zones of inhibition produced were measured. Enrofloxacin was found to produce the largest inhibition zone compared to other commercial antibiotics. All the test bacteria were found sensitive to all the essential oil evaluated. The zones of inhibition of the essential oils were compared to the zones of inhibition of enrofloxacin. The results showed that the essential oils tested were exhibiting better antimicrobial property against isolate E 203 of E. coli and isolate S 133 of Salmonella spp. each compared to enrofloxacin. This study concludes that the plant essential oils tested have significant antimicrobial activity

Item Type:	Project Paper
Faculty:	Faculty of Veterinary Medicine
Depositing User:	Ms Nurhaznita Mahmood
Date Deposited:	09 Nov 2023 03:01
Last Modified:	09 Nov 2023 03:01
URI:	http://psaspb.upm.edu.my/id/eprint/1518

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