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2022, Vol: 18, Issue: 1
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Original Research 


Optimization of culture conditions and antimicrobial activity of Streptomyces longisporoflavus

Omyma Ahmed Awadalla, Sameh Samir Ali, Sara Attia Ahmed.

Abstract
In the present study Streptomyces longisporoflavus was screened for antimicrobial activity against fourteen MDR pathogenic bacteria ( Escherichia coli, Proteus mirabilis, Pseudomonas aeruginosa, Salmonella typhimurium, Klebsiella pneumonia Staphylococcus aureus, Bacillus cereus, Listeria monocytogenes), and fungi (Tricosporon mucoides, Candida albicans, Candida glabrata, Candida krusie, Candida dublinesis and Candida tropicalis) by using well- agar diffusion method. S.longisporoflavus showed high antimicrobial activity only against seven of the fourteen tested MDR bacteria and fungi (Escherichia coli, Proteus mirabilis, Pseudomonas aeruginosa, Staphylococcus aureus, Bacillus cereus, Listeria monocytogenes and Candida tropicalis).Cultural conditions of S.longisporoflavus were optimized for maximizing growth and antimicrobial activity. The results under the optimized conditions recorded the maximum mycelial dry weight and significant antimicrobial activity against all the seven MDR pathogenic bacteria, with incubation period 8 days, at pH 7, temperature 55°C, media supplemented with potassium nitrate as nitrogen and starch as carbon sources. The highest diameters of inhibition zones by the antimicrobial materials were recorded with MDR Staph aureus followed by E.coli and proteus mirabilis (37, 35, and 34mm respectively) , at all optimal cultural conditions of S.longisporoflavus.

Key words: Streptomyces longisporoflavus, optimization, antimicrobial activity, MDR pathogenic bacteria and fungi.


 
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How to Cite this Article
Pubmed Style

Awadalla OA, Ali SS, Ahmed SA, . Optimization of culture conditions and antimicrobial activity of Streptomyces longisporoflavus. Egypt. J. Exp. Biol. (Bot.). 2018; 14(2): 211-218. doi:10.5455/egyjebb.20180711115454

Web Style

Awadalla OA, Ali SS, Ahmed SA, . Optimization of culture conditions and antimicrobial activity of Streptomyces longisporoflavus. https://www.egyseb.net//?mno=701 [Access: April 05, 2022]. doi:10.5455/egyjebb.20180711115454

AMA (American Medical Association) Style

Awadalla OA, Ali SS, Ahmed SA, . Optimization of culture conditions and antimicrobial activity of Streptomyces longisporoflavus. Egypt. J. Exp. Biol. (Bot.). 2018; 14(2): 211-218. doi:10.5455/egyjebb.20180711115454


Vancouver/ICMJE Style

Awadalla OA, Ali SS, Ahmed SA, . Optimization of culture conditions and antimicrobial activity of Streptomyces longisporoflavus. Egypt. J. Exp. Biol. (Bot.). (2018), [cited April 05, 2022]; 14(2): 211-218. doi:10.5455/egyjebb.20180711115454


Harvard Style

Awadalla, O. . A., Ali, S. S., Ahmed, S. A. & (2018) Optimization of culture conditions and antimicrobial activity of Streptomyces longisporoflavus. Egypt. J. Exp. Biol. (Bot.), 14 (2), 211-218. doi:10.5455/egyjebb.20180711115454


Turabian Style

Awadalla, Omyma Ahmed, Sameh Samir Ali, Sara Attia Ahmed, and . 2018. Optimization of culture conditions and antimicrobial activity of Streptomyces longisporoflavus. THE EGYPTIAN JOURNAL OF EXPERIMENTAL BIOLOGY (Botany), 14 (2), 211-218. doi:10.5455/egyjebb.20180711115454


Chicago Style

Awadalla, Omyma Ahmed, Sameh Samir Ali, Sara Attia Ahmed, and . "Optimization of culture conditions and antimicrobial activity of Streptomyces longisporoflavus." THE EGYPTIAN JOURNAL OF EXPERIMENTAL BIOLOGY (Botany) 14 (2018), 211-218. doi:10.5455/egyjebb.20180711115454


MLA (The Modern Language Association) Style

Awadalla, Omyma Ahmed, Sameh Samir Ali, Sara Attia Ahmed, and . "Optimization of culture conditions and antimicrobial activity of Streptomyces longisporoflavus." THE EGYPTIAN JOURNAL OF EXPERIMENTAL BIOLOGY (Botany) 14.2 (2018), 211-218. Print. doi:10.5455/egyjebb.20180711115454


APA (American Psychological Association) Style

Awadalla, O. . A., Ali, S. S., Ahmed, S. A. & (2018) Optimization of culture conditions and antimicrobial activity of Streptomyces longisporoflavus. THE EGYPTIAN JOURNAL OF EXPERIMENTAL BIOLOGY (Botany), 14 (2), 211-218. doi:10.5455/egyjebb.20180711115454


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