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Synergistic Antibacterial Activity of Black Seed (Nigella sativa) and Clove (Syzigium Aromaticum) Against Some Selected Pathogenic Bacteria

Received: 25 November 2021    Accepted: 23 December 2021    Published: 15 January 2022
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Abstract

At present, the paucity of new antimicrobials coming into the market has led to the problem of antibiotic resistance fast escalating into a global health crisis. Diverse on metabolic, genetic and physiological fronts, rapid progression of resistant microbes and the lack of a strategic management plan have led researchers to consider plant-derived substances (PDS) as alternative or in complementing antibiotics against the diseases, thus the aim of this study was to assess the antibacterial effect of black seed (Nigella. sativa) and clove (Siyzigium. aromaticum) seed extracts and their synergistic action against some selected pathogenic bacteria; namely: Klebsiella pneumoniae, Staphylococcus aureus, Salmonell typhi and Escherichia coli clinical isolates and their standard derivatives. Ethanol, hexane, acetone and chloroform crude extracts of N. sativa and S. aromaticum were evaluated against tested pathogenic bacteria using agar well diffusion method; the inhibitory zones were recorded in millimeters. Ciprofloxacin was used as positive controls, while dimethyl sulfooxide (DMSO) was served as negative control. The minimal inhibitory concentration (MIC) of the plant extracts against test bacteria were assessed using agar well dilution and broth dilution method; and then Minimum Bactericidal Concentration (MBC) was evaluated. The inhibition zone of all N. sativa crude extract against all clinical isolate and standard pathogenic bacteria ranged from (12-30mm). The inhibition zone of all S. aromaticum crude extract against all clinical and standard pathogenic bacteria ranged from (12-32mm). N. sativa hexane extract against E. coli (clinical isolate) exhibited the lowest inhibition zone while acetone extract against S. aureus (ATCC25923) exhibited the highest inhibition zone. S. aromaticum chloroform extract against S. aurues (clinical isolate) exhibited the lowest inhibition zone while ethanol extract against S. aureus (ATCC25923) exhibited the highest inhibition zone. The synergistic antibacterial effect of N. sativa and S. aromaticum crude extract against both clinical isolate and standard pathogenic bacteria ranged from (12-33mm). The inhibition zone of the synergistic antibacterial effect of N. sativa and S. aromaticum seed extracts against tested pathogenic bacteria was significantly (P value ranges from 0.01 to 0.03) greater than the extracts used separately. Thus, the present finding supports the traditional use of these plants in combination for treating pathogens. And also there is a need for detailed scientific study of traditional knowledge to ensure that valuable therapeutic knowledge of some plants is preserved as well as to provide scientific evidence for their efficacies. The result of phytochemical screening also showed that the plants contain trepenoids, tannin, flavonoids and saponins except acetone extract of both plants which could not show the presence of flavonoids.

Published in International Journal of Biomedical Materials Research (Volume 10, Issue 1)
DOI 10.11648/j.ijbmr.20221001.11
Page(s) 1-23
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Nigella Sativa, Syzigium Aromaticum, Synergistic Effect, Antibacterial Activity, Inhibition Zone, Phytochemical Screening

References
[1] Abd-awn, B. H., AL-dhaher, Z. A. & AL-dafaai, R. R. 2012. The effect of black seed oil extracts on mutans streptococci in comparison to chlorhexidine gluconate (in vitro). Journal of baghdad college of dentistry, 24.
[2] Abdallah, E. M. 2017. Black Seed (Nigella sativa) as antimicrobial drug: a mini-review. Novel Approches in Drug Designing and Develop, 3, 1-5.
[3] Abdullah, B. H., Hatem, S. F. & Jumaa, W. 2015. A comparative study of the antibacterial activity of clove and rosemary essential oils on multidrug resistant bacteria. UK Journal of Pharmaceutical and Biosciences, 3, 18-22.
[4] Adam, S. I., Salih, S. A. & Abdelgadir, W. S. 2011. " In vitro" Antimicrobial Assessment of" Lepidium sativum" L. Seeds Extracts. Asian Journal of Medical Sciences, 3, 261-266.
[5] Akova, M. 2016. Epidemiology of antimicrobial resistance in bloodstream infections. Virulence, 7, 252-266.
[6] AL-salt, J. 2012. Antimicrobial activity of crude extracts of some plant leaves. Res J Microbiol, 7, 59-67.
[7] Alam, M., Yasmin, M., Nessa, J. & Ahsan, C. 2010. Antibacterial activity of chloroform and ethanol extracts of black cumin seeds (Nigella sativa) against multi-drug resistant human pathogens under laboratory conditions. Journal of Medicinal Plants Research, 4, 1901-1905.
[8] Alsheikh, H. M. A., Sultan, I., Kumar, V., Rather, I. A., AL-Sheikh, H., Tasleem JAN, A. & Haq, Q. M. R. 2020. Plant-based phytochemicals as possible alternative to antibiotics in combating bacterial drug resistance. Antibiotics, 9, 480.
[9] Asfaw, D. 2019. Department of Food Science and Nutrition, Wollega University, Ethiopia.
[10] Aslam, B., Wang, W., Arshad, M. I., Khurshid, M., Muzammil, S., Rasool, M. H., Nisar, M. A., Alvi, R. F., Aslam, M. A. & Qamar, M. U. 2018. Antibiotic resistance: a rundown of a global crisis. Infection and drug resistance, 11, 1645.
[11] Assefa, E., Alemayehu, A. & Mamo, T. 2015. Adaptability study of black cumin (Nigella sativa L.) varieties in the mid and high land areas of Kaffa zone, South West Ethiopia. Agriculture, Forestry and Fisheries, 4, 14-17.
[12] Bakathir, H. A. & Abbas, N. A. 2011. Detection of the antibacterial effect of nigella sativa ground seedswith water. African Journal of Traditional, Complementary and Alternative Medicines, 8.
[13] Batiha, G. E.-S., Alkazmi, L. M., Wasef, L. G., Beshbishy, A. M., Nadwa, E. H. & Rashwan, E. K. 2020. Syzygium aromaticum L.(Myrtaceae): Traditional uses, bioactive chemical constituents, pharmacological and toxicological activities. Biomolecules, 10.
[14] Batiha, G. E.-S., Beshbishy, A. M., Tayebwa, D. S., Shaheen, H. M., Yokoyama, N. & Igarashi, I. 2019. Inhibitory effects of Syzygium aromaticum and Camellia sinensis methanolic extracts on the growth of Babesia and Theileria parasites. Ticks and tick-borne diseases, 10, 949-958.
[15] Belachew, N., Tadesse, T. & Gube, A. A. 2017. Knowledge, attitude, and practice of complementary and alternative medicine among residents of Wayu town, Western Ethiopia. Journal of evidence-based complementary & alternative medicine, 22, 929-935.
[16] Belayneh, A. & Bussa, N. F. 2014. Ethnomedicinal plants used to treat human ailments in the prehistoric place of Harla and Dengego valleys, eastern Ethiopia. Journal of Ethnobiology and Ethnomedicine, 10, 1-17.
[17] Bhowmik, D., Kumar, K. S., Yadav, A., Srivastava, S., Paswan, S. & Dutta, A. S. 2012. Recent trends in Indian traditional herbs Syzygium aromaticum and its health benefits. Journal of Pharmacognosy and Phytochemistry, 1, 13-22.
[18] Capita, R. & Alonso-Calleja, C. 2013. Antibiotic-resistant bacteria: a challenge for the food industry. Critical reviews in food science and nutrition, 53, 11-48.
[19] Cortés-Rojas, D. F., de souza, C. R. F. & Oliveira, W. P. 2014. Clove (Syzygium aromaticum): a precious spice. Asian Pacific journal of tropical biomedicine, 4, 90-96.
[20] Devi, K. P., Nisha, S. A., Sakthivel, R. & Pandian, S. K. 2010. Eugenol (an essential oil of clove) acts as an antibacterial agent against Salmonella typhi by disrupting the cellular membrane. Journal of ethnopharmacology, 130, 107-115.
[21] Dhillon, R. H.-P. & Clark, J. 2012. ESBLs: a clear and present danger? Critical care research and practice, 2012.
[22] Dwivedi, V., Shrivastava, R., Hussain, S., ganguly, C. & Bharadwaj, M. 2011. Comparative anticancer potential of clove (Syzygium aromaticum)—an Indian spice—against cancer cell lines of various anatomical origin. Asian Pac J Cancer Prev, 12, 1989-93.
[23] Falodun, A. 2010. Herbal medicine in Africa-distribution, standardization and prospects. Research Journal of Phytochemistry, 4, 154-161.
[24] Garba, L., Lawan, H., Puma, H., Abdullahi, M., Yusuf, I. & Mukhtar, M. 2019. Phytochemical Screening and in vitro Bacteriostatic Effects of Syzigium aromaticum (Clove) Extracts on Clinical Bacterial Isolates. Journal of Biochemistry, Microbiology and Biotechnology, 7, 5-9.
[25] Gunjan, M., Naing, T. W., Saini, R. S., Ahmad, A., Naidu, J. R. & Kumar, I. 2015. Marketing trends & future prospects of herbal medicine in the treatment of various disease. World Journal of Pharmaceutical Research, 4, 132-155.
[26] Gupta, M., Singh, A. & Joshi, H. C. 2015. Berberis lycium multipotential medicinal application: an overview. International Journal of chemical studies, 3, 10-13.
[27] Halawani, E. 2009. Antibacterial activity of thymoquinone and thymohydroquinone of Nigella sativa L. and their interaction with some antibiotics. Advances in Biological Research, 3, 148-152.
[28] Halder, S., Mehta, A. K., Kar, R., Mustafa, M., Mediratta, P. K. & Sharma, K. K. 2011. Clove oil reverses learning and memory deficits in scopolamine-treated mice. Planta medica, 77, 830-834.
[29] Harvey, A. L., Edrada-Ebel, R. & Quinn, R. J. 2015. The re-emergence of natural products for drug discovery in the genomics era. Nature reviews drug discovery, 14, 111-129.
[30] Hoque, M. M., Inatsu, M., Juneja, V. & Kawamoto, S. 2008. Antimicrobial activity of cloves and cinnamon extracts against food borne pathogens and spoilage bacteria and inactivation of Listeria monocytogenes in ground chicken meat with their essential oils. Rep Natʼl Food Res Inst, 72, 9-21.
[31] Hussain, D. A. & Hussain, M. M. 2016. Nigella sativa (black seed) is an effective herbal remedy for every disease except death-a Prophetic statement which modern scientists confirm unanimously: a review. Adv Med Plant Res, 4, 27-57.
[32] Ishtiaq, S., Ashraf, M., Hayat, M. Q. & Asrar, M. 2013. Phytochemical analysis of Nigella sativa and its antibacterial activity against clinical isolates identified by ribotyping. International Journal of Agriculture and Biology, 15.
[33] Jibat, M., Getachew, W., Kifelew, H. & Getu, A. 2018. Survey and Identification of Major Diseases of Black Cumin (Nigella sativa L.) in Ethiopia. Results of Plant Protection Research.
[34] Jima, T. T. & Megersa, M. 2018. Ethnobotanical study of medicinal plants used to treat human diseases in Berbere District, Bale Zone of Oromia Regional State, South East Ethiopia. Evidence-Based Complementary and Alternative Medicine, 2018.
[35] Jyothiprabha, V. & Venkatachalam, P. 2016. Preliminary phytochemical screening of different solvent extracts of selected lndian spices. Int. J. Curr. Microbiol. App. Sci, 5, 116-122.
[36] Kamatou, G. P., Vermaak, I. & Viljoen, A. M. 2012. Eugenol—from the remote Maluku Islands to the international market place: a review of a remarkable and versatile molecule. Molecules, 17, 6953-6981.
[37] Kennedy, D. O. & Wightman, E. L. 2011. Herbal extracts and phytochemicals: plant secondary metabolites and the enhancement of human brain function. Advances in Nutrition, 2, 32-50.
[38] Laxminarayan, R., Matsoso, P., Pant, S., Brower, C., Røttingen, J.-A., Klugman, K. & Davies, S. 2016. Access to effective antimicrobials: a worldwide challenge. The Lancet, 387, 168-175.
[39] Machowska, A. & Stålsby Lundborg, C. 2019. Drivers of irrational use of antibiotics in Europe. International journal of environmental research and public health, 16, 27.
[40] Manandhar, N. 2018. PHYTOCHEMICAL AND ANTIOXIDANT ACTIVITY OF COMMON SPICES AND THEIR MIX.
[41] Maroyi, A. 2011. An ethnobotanical survey of medicinal plants used by the people in Nhema communal area, Zimbabwe. Journal of ethnopharmacology, 136, 347-354.
[42] Martin, H. C. 2017. Antibacterial Activity of Piper guineense, Xylopia aethiopica and Allium cepa against Bacteria Isolated from Spoilt Soup Preparations.
[43] Martínez-Herrera, A., Pozos-Guillén, A., Ruiz-Rodríguez, S., Garrocho-Rangel, A., Vértiz-Hernández, A. & Escobar-García, D. M. 2016. Effect of 4-allyl-1-hydroxy-2-methoxybenzene (eugenol) on inflammatory and apoptosis processes in dental pulp fibroblasts. Mediators of inflammation, 2016.
[44] Moges, A. & Moges, Y. 2019. Ethiopian Common Medicinal Plants: Their Parts and Uses in Traditional Medicine-Ecology and Quality Control. Plant Science-Structure, Anatomy and Physiology in Plants Cultured in Vivo and in Vitro.
[45] Mushtaq, S., Abbasi, B. H., Uzair, B. & Abbasi, R. 2018. Natural products as reservoirs of novel therapeutic agents. EXCLI journal, 17, 420.
[46] Namukobe, J., Kasenene, J. M., Kiremire, B. T., Byamukama, R., Kamatenesi-Mugisha, M., Krief, S., Dumontet, V. & Kabasa, J. D. 2011. Traditional plants used for medicinal purposes by local communities around the Northern sector of Kibale National Park, Uganda. Journal of Ethnopharmacology, 136, 236-245.
[47] Nascimento, G. G., Locatelli, J., Freitas, P. C. & Silva, G. L. 2000. Antibacterial activity of plant extracts and phytochemicals on antibiotic-resistant bacteria. Brazilian journal of microbiology, 31, 247-256.
[48] Oulkheir, S., Aghrouch, M., EL Mourabit, F., Dalha, F., Graich, H., Amouch, F., Ouzaid, K., Moukale, A. & Chadli, S. 2017. Antibacterial activity of essential oils extracts from cinnamon, thyme, clove and geranium against a gram negative and gram positive pathogenic bacteria. Journal of diseases and medicinal plants, 3, 1.
[49] Pan, S.-Y., Litscher, G., Gao, S.-H., Zhou, S.-F., Yu, Z.-L., Chen, H.-Q., Zhang, S.-F., Tang, M.-K., Sun, J.-N. & Ko, K.-M. 2014. Historical perspective of traditional indigenous medical practices: the current renaissance and conservation of herbal resources. Evidence-Based Complementary and Alternative Medicine, 2014.
[50] Pan, S. Y., Pan, S., Yu, Z.-L., Ma, D.-L., Chen, S.-B., Fong, W.-F., Han, Y.-F. & Ko, K.-M. 2010. New perspectives on innovative drug discovery: an overview. Journal of Pharmacy & Pharmaceutical Sciences, 13, 450-471.
[51] Patra, A. K. 2012. An overview of antimicrobial properties of different classes of phytochemicals. Dietary phytochemicals and microbes, 1-32.
[52] Petrus, E., Tinakumari, S., Chai, L., Ubong, A., Tunung, R., Elexson, N., Chai, L. & Son, R. 2011. A study on the minimum inhibitory concentration and minimum bactericidal concentration of Nano Colloidal Silver on food-borne pathogens. International Food Research Journal, 18.
[53] Safhia, M. M., Alama, M. F., Sivakumarb, S., Jabeenb, A., Anwera, T., Khana, G. & Islamc, F. 2014. Antibacterial spectrum of black seed oil against selected human pathogenic bacteria. J Pharm Res, 8, 1726-1728.
[54] Salem, E. M., Yar, T., Bamosa, A. O., AL-quorain, A., Yasawy, M. I., Alsulaiman, R. M. & Randhawa, M. A. 2010. Comparative study of Nigella Sativa and triple therapy in eradication of Helicobacter Pylori in patients with non-ulcer dyspepsia. Saudi journal of gastroenterology: official journal of the Saudi Gastroenterology Association, 16, 207.
[55] Saxena, A., Mukhopadhyay, A. & Nandi, S. 2020. Antibacterial activity of selected plants extract against pathogenic bacteria and detection of phytochemicals. Journal of Environmental Biology, 41, 1486-1492.
[56] Singh, G., Marimuthu, P., De Heluani, C. S. & Catalan, C. 2005. Chemical constituents and antimicrobial and antioxidant potentials of essential oil and acetone extract of Nigella sativa seeds. Journal of the Science of Food and Agriculture, 85, 2297-2306.
[57] Srinivasan, K. 2018. Cumin (Cuminum cyminum) and black cumin (Nigella sativa) seeds: traditional uses, chemical constituents, and nutraceutical effects. Food quality and safety, 2, 1-16.
[58] Utami, A. & Pratomo, B. 2016. Noorhamdani. Study of Antimicrobial Activity of Black Cumin Seeds (Nigella sativa L.) Against Salmonella typhi In Vitro. J. Med. Surg. Pathol, 1.
[59] Zemene, A. & Berhane, N. 2017. Synergistic antibacterial effect of Lepidium sativum and Coriandrum sativum against standard and drug resistant clinically isolated pathogenic bacteria. African Journal of Biotechnology, 16, 1743-1757.
[60] Zhang, Q., Sharan, A., Espinosa, S. A., Gallego-Perez, D. & Weeks, J. 2019. The path toward integration of traditional and complementary medicine into health systems globally: The World Health Organization report on the implementation of the 2014–2023 strategy. The Journal of Alternative and Complementary Medicine, 25, 869-871.
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    Hawi Mohammed, Fatuma Mohammed, Preetha i Velaydhanpilla, Nega Berhane, Aragaw Zemene. (2022). Synergistic Antibacterial Activity of Black Seed (Nigella sativa) and Clove (Syzigium Aromaticum) Against Some Selected Pathogenic Bacteria. International Journal of Biomedical Materials Research, 10(1), 1-23. https://doi.org/10.11648/j.ijbmr.20221001.11

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    Hawi Mohammed; Fatuma Mohammed; Preetha i Velaydhanpilla; Nega Berhane; Aragaw Zemene. Synergistic Antibacterial Activity of Black Seed (Nigella sativa) and Clove (Syzigium Aromaticum) Against Some Selected Pathogenic Bacteria. Int. J. Biomed. Mater. Res. 2022, 10(1), 1-23. doi: 10.11648/j.ijbmr.20221001.11

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    AMA Style

    Hawi Mohammed, Fatuma Mohammed, Preetha i Velaydhanpilla, Nega Berhane, Aragaw Zemene. Synergistic Antibacterial Activity of Black Seed (Nigella sativa) and Clove (Syzigium Aromaticum) Against Some Selected Pathogenic Bacteria. Int J Biomed Mater Res. 2022;10(1):1-23. doi: 10.11648/j.ijbmr.20221001.11

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  • @article{10.11648/j.ijbmr.20221001.11,
      author = {Hawi Mohammed and Fatuma Mohammed and Preetha i Velaydhanpilla and Nega Berhane and Aragaw Zemene},
      title = {Synergistic Antibacterial Activity of Black Seed (Nigella sativa) and Clove (Syzigium Aromaticum) Against Some Selected Pathogenic Bacteria},
      journal = {International Journal of Biomedical Materials Research},
      volume = {10},
      number = {1},
      pages = {1-23},
      doi = {10.11648/j.ijbmr.20221001.11},
      url = {https://doi.org/10.11648/j.ijbmr.20221001.11},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijbmr.20221001.11},
      abstract = {At present, the paucity of new antimicrobials coming into the market has led to the problem of antibiotic resistance fast escalating into a global health crisis. Diverse on metabolic, genetic and physiological fronts, rapid progression of resistant microbes and the lack of a strategic management plan have led researchers to consider plant-derived substances (PDS) as alternative or in complementing antibiotics against the diseases, thus the aim of this study was to assess the antibacterial effect of black seed (Nigella. sativa) and clove (Siyzigium. aromaticum) seed extracts and their synergistic action against some selected pathogenic bacteria; namely: Klebsiella pneumoniae, Staphylococcus aureus, Salmonell typhi and Escherichia coli clinical isolates and their standard derivatives. Ethanol, hexane, acetone and chloroform crude extracts of N. sativa and S. aromaticum were evaluated against tested pathogenic bacteria using agar well diffusion method; the inhibitory zones were recorded in millimeters. Ciprofloxacin was used as positive controls, while dimethyl sulfooxide (DMSO) was served as negative control. The minimal inhibitory concentration (MIC) of the plant extracts against test bacteria were assessed using agar well dilution and broth dilution method; and then Minimum Bactericidal Concentration (MBC) was evaluated. The inhibition zone of all N. sativa crude extract against all clinical isolate and standard pathogenic bacteria ranged from (12-30mm). The inhibition zone of all S. aromaticum crude extract against all clinical and standard pathogenic bacteria ranged from (12-32mm). N. sativa hexane extract against E. coli (clinical isolate) exhibited the lowest inhibition zone while acetone extract against S. aureus (ATCC25923) exhibited the highest inhibition zone. S. aromaticum chloroform extract against S. aurues (clinical isolate) exhibited the lowest inhibition zone while ethanol extract against S. aureus (ATCC25923) exhibited the highest inhibition zone. The synergistic antibacterial effect of N. sativa and S. aromaticum crude extract against both clinical isolate and standard pathogenic bacteria ranged from (12-33mm). The inhibition zone of the synergistic antibacterial effect of N. sativa and S. aromaticum seed extracts against tested pathogenic bacteria was significantly (P value ranges from 0.01 to 0.03) greater than the extracts used separately. Thus, the present finding supports the traditional use of these plants in combination for treating pathogens. And also there is a need for detailed scientific study of traditional knowledge to ensure that valuable therapeutic knowledge of some plants is preserved as well as to provide scientific evidence for their efficacies. The result of phytochemical screening also showed that the plants contain trepenoids, tannin, flavonoids and saponins except acetone extract of both plants which could not show the presence of flavonoids.},
     year = {2022}
    }
    

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  • TY  - JOUR
    T1  - Synergistic Antibacterial Activity of Black Seed (Nigella sativa) and Clove (Syzigium Aromaticum) Against Some Selected Pathogenic Bacteria
    AU  - Hawi Mohammed
    AU  - Fatuma Mohammed
    AU  - Preetha i Velaydhanpilla
    AU  - Nega Berhane
    AU  - Aragaw Zemene
    Y1  - 2022/01/15
    PY  - 2022
    N1  - https://doi.org/10.11648/j.ijbmr.20221001.11
    DO  - 10.11648/j.ijbmr.20221001.11
    T2  - International Journal of Biomedical Materials Research
    JF  - International Journal of Biomedical Materials Research
    JO  - International Journal of Biomedical Materials Research
    SP  - 1
    EP  - 23
    PB  - Science Publishing Group
    SN  - 2330-7579
    UR  - https://doi.org/10.11648/j.ijbmr.20221001.11
    AB  - At present, the paucity of new antimicrobials coming into the market has led to the problem of antibiotic resistance fast escalating into a global health crisis. Diverse on metabolic, genetic and physiological fronts, rapid progression of resistant microbes and the lack of a strategic management plan have led researchers to consider plant-derived substances (PDS) as alternative or in complementing antibiotics against the diseases, thus the aim of this study was to assess the antibacterial effect of black seed (Nigella. sativa) and clove (Siyzigium. aromaticum) seed extracts and their synergistic action against some selected pathogenic bacteria; namely: Klebsiella pneumoniae, Staphylococcus aureus, Salmonell typhi and Escherichia coli clinical isolates and their standard derivatives. Ethanol, hexane, acetone and chloroform crude extracts of N. sativa and S. aromaticum were evaluated against tested pathogenic bacteria using agar well diffusion method; the inhibitory zones were recorded in millimeters. Ciprofloxacin was used as positive controls, while dimethyl sulfooxide (DMSO) was served as negative control. The minimal inhibitory concentration (MIC) of the plant extracts against test bacteria were assessed using agar well dilution and broth dilution method; and then Minimum Bactericidal Concentration (MBC) was evaluated. The inhibition zone of all N. sativa crude extract against all clinical isolate and standard pathogenic bacteria ranged from (12-30mm). The inhibition zone of all S. aromaticum crude extract against all clinical and standard pathogenic bacteria ranged from (12-32mm). N. sativa hexane extract against E. coli (clinical isolate) exhibited the lowest inhibition zone while acetone extract against S. aureus (ATCC25923) exhibited the highest inhibition zone. S. aromaticum chloroform extract against S. aurues (clinical isolate) exhibited the lowest inhibition zone while ethanol extract against S. aureus (ATCC25923) exhibited the highest inhibition zone. The synergistic antibacterial effect of N. sativa and S. aromaticum crude extract against both clinical isolate and standard pathogenic bacteria ranged from (12-33mm). The inhibition zone of the synergistic antibacterial effect of N. sativa and S. aromaticum seed extracts against tested pathogenic bacteria was significantly (P value ranges from 0.01 to 0.03) greater than the extracts used separately. Thus, the present finding supports the traditional use of these plants in combination for treating pathogens. And also there is a need for detailed scientific study of traditional knowledge to ensure that valuable therapeutic knowledge of some plants is preserved as well as to provide scientific evidence for their efficacies. The result of phytochemical screening also showed that the plants contain trepenoids, tannin, flavonoids and saponins except acetone extract of both plants which could not show the presence of flavonoids.
    VL  - 10
    IS  - 1
    ER  - 

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Author Information
  • Department of Medical Biotechnology, Institute of Biotechnology, University of Gondar, Gondar, Ethiopia

  • Department of Medical Biotechnology, Institute of Biotechnology, University of Gondar, Gondar, Ethiopia

  • Department of Medical Biotechnology, Institute of Biotechnology, University of Gondar, Gondar, Ethiopia

  • Department of Medical Biotechnology, Institute of Biotechnology, University of Gondar, Gondar, Ethiopia

  • Department of Medical Biotechnology, Institute of Biotechnology, University of Gondar, Gondar, Ethiopia

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