Journal
PHARMACEUTICAL BIOLOGY
Volume 47, Issue 5, Pages 452-457Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/13880200902822604
Keywords
Food-borne pathogens; Juniperus phoenicea; Oudneya africana; Pistacia atlantica
Funding
- Ministry of Higher Education, Scientific Research and Technology, Republic of Tunisia
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Seed extracts of three plant species that grow wild in the arid regions of Tunisia, Juniperus phoenicea L. (Cupressaceae), Pistacia atlantica Desf. (Anacardiaceae), and Oudneya africana R. Br. (Brassicaceae), were examined for antimicrobial activity against bacterial food pathogens. Aqueous extracts were prepared and then precipitated with methanol or acetone. Extracted acetone fractions (pH 7.2) showed powerful antimicrobial activity, especially against Listeria monocytogenes, Listeria innocua, and Listeria ivanovii (Grampositive) and were also active against Gram-negative strains Escherichia coli and Pseudomonas aeruginosa. Extracts selected for high antimicrobial activity were stable in the presence of organic solvents (chloroform, hexane, acetonitrile, methanol, and acetone), and withstand thermal treatments up to 100 degrees C for 30 min.L. monocytogenes LSD530 and E. coli ATCC 25922 appeared to be inhibited by Juniperus and Pistacia extracts with a minimum concentration of 1.56 and 3. 12 mg/mL, respectively. This study established the potential of medicinal plants growing wild in arid regions of Tunisia as a source of antimicrobial agents.
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