alexa Screening Of Some Commonly Used Plant Extracts For Their Effects On Some Gut Pathogens And Probiotics
ISSN: 2161-0703

Journal of Medical Microbiology & Diagnosis
Open Access

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JOINT EVENT ON 15th International PHARMACEUTICAL MICROBIOLOGY AND BIOTECHNOLOGY CONFERENCE & 10th Annual MEDICAL MICROBIOLOGY SUMMIT & EXPO
June 21-23, 2017 London, UK

Samah O Noor
King Abdulaziz University, KSA
Posters & Accepted Abstracts: J Med Microb Diagn
DOI: 10.4172/2161-0703-C1-006
Abstract
Background: All surfaces of human body were colonized by many microbial communities but gut is colonized in greater densities known as the microbiota or commensal microflora which is mainly influenced by the plant extracts in the diet. Materials & Methods: In this study, 4 different plant materials, the leaves of Camellia sinensis, Mentha piperita and Petroselinum crispum in addition to the Pimpinella anisum seeds were collected and extracted with either hot water or methanol. The antimicrobial activity was determined using agar well diffusion method. Results: All the extracts showed antibacterial activity against some bacterial pathogens, Escherichia coli, Salmonella typhimurium, Pseudomonas earuginosa, Enterococcus faecalis, E. faecium Staphylococcus aureus and Streptococcus agalactiae which was used as a control. The water and methanol extract of Camellia sinensis and the water extract of Pimpinella anisum and Petroselinum crispum showed significant lower antibacterial activity against all the tested probiotic bacteria Lactobacillus and Bifidobacteria. MICs values of the water extracts of the 4 tested plants were recorded for the test bacterial pathogens in addition to the tested probiotic bacteria. Concerning the pathogenic bacteria, MIC was ranged from 50-250 μg/ml, 100-150 μg/ml, 150 μg/ml and 75-125 μg/ml for Camellia sinensis, Pimpinella anisum, Petroselinum crispum, respectively. Concerning the probiotics, the MIC of the 4 tested plants was greater than 250 μg/ml except for L. plantarum, where the MIC of Camellia sinensis was 250μg/ml. The presence of plant extracts slightly decrease the rate of growth L. acidophilus and the decrease was clear in case of Camellia sinensis>Mentha piperita>Pimpinella anisum>Petroselinum crispum. Conclusion: Some plant extracts affect significantly the pathogenic bacterial growth but the effect was lower on some gut bacteria, thus they can be used safely to improve human health.
Biography

Samah O Noor has completed her PhD from University of East Angelia, UK in 2010. Since then, she works as an Assistant Professor, and has been the Vice Dean of Post-graduate studies and Research in the Faculty of Science, at King Abdulaziz University. She has a team of post-graduate students who are working and publishing on the antibiotic effect of natural products and there safety on the body normal flora.

Email: [email protected]

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