Volume 20, Issue 143 (2023)                   FSCT 2023, 20(143): 150-157 | Back to browse issues page


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Barzegar H, Alizadeh Behbahani B. Antimicrobial effect of Russian knapweed aqueous extract on Escherichia coli, Salmonella typhi, Listeria monocytogenes, and Bacillus cereus in vitro. FSCT 2023; 20 (143) :150-157
URL: http://fsct.modares.ac.ir/article-7-70726-en.html
1- Associate Professor, Department of Food Science and Technology, Faculty of Animal Science and Food Technology, Agricultural Sciences and Natural Resources University of Khuzestan, Mollasani, Iran. , barzegarha@yahoo.com
2- Associate Professor, Department of Food Science and Technology, Faculty of Animal Science and Food Technology, Agricultural Sciences and Natural Resources University of Khuzestan, Mollasani, Iran.
Abstract:   (590 Views)
The plant Russian knapweed is known as a blood sugar lowering drug, and the antimicrobial properties of its extracts and essential oils have been proven; Therefore, this study was conducted with the aim of extracting the aqueous extract of R. knapweed and investigating its antimicrobial activity. The aqueous extract of R. knapweed was extracted by the maceration method. The antibacterial activity of the extract against Escherichia coli, Salmonella typhi, Listeria monocytogenes, and Bacillus cereus was investigated using disk diffusion agar, well diffusion agar, minimum inhibitory concentration, and minimum bactericidal concentration methods. The results of this research showed that the antimicrobial activity of the extract was dependent on the concentration and the highest diameter of the inhibition zone was observed at the concentration of 100 mg/ml of the extract. Based on disk diffusion agar and well diffusion agar tests, Listeria monocytogenes bacteria had the highest and Escherichia coli, Salmonella typhi, and Bacillus cereus had the lowest inhibition zones, respectively. The minimum inhibitory concentration for Escherichia coli, Salmonella typhi, Listeria monocytogenes, and Bacillus cereus bacteria was obtained as 64, 64, 16, and 32 mg/ml, respectively, and the minimum bactericidal concentration values for these bacteria were 512, 512, 256, and 256 mg/ml, respectively. In generally, the Gram-positive bacteria were more sensitive to the extract compared to the Gram-negative types. The growth of pathogenic bacteria and the diseases transmitted by these bacteria can be controlled by using natural antimicrobial compounds such as R. knapweed aqueous extract.
 
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Article Type: Original Research | Subject: Essences and extracts
Received: 2023/07/24 | Accepted: 2023/09/20 | Published: 2023/11/1

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