Antibacterial activity of two Streptomyces species isolated from Egyptian and Libyan soils
El-Sayed, A., Abou-Dobara, M., El-Manafi, N. (2015). Antibacterial activity of two Streptomyces species isolated from Egyptian and Libyan soils. EKB Journal Management System, 5(1), 1-11. doi: 10.21608/sjdfs.2015.194450
Ahmed K.A. El-Sayed; Mohamed I. Abou-Dobara; Nouria S. El-Manafi. "Antibacterial activity of two Streptomyces species isolated from Egyptian and Libyan soils". EKB Journal Management System, 5, 1, 2015, 1-11. doi: 10.21608/sjdfs.2015.194450
El-Sayed, A., Abou-Dobara, M., El-Manafi, N. (2015). 'Antibacterial activity of two Streptomyces species isolated from Egyptian and Libyan soils', EKB Journal Management System, 5(1), pp. 1-11. doi: 10.21608/sjdfs.2015.194450
El-Sayed, A., Abou-Dobara, M., El-Manafi, N. Antibacterial activity of two Streptomyces species isolated from Egyptian and Libyan soils. EKB Journal Management System, 2015; 5(1): 1-11. doi: 10.21608/sjdfs.2015.194450

Antibacterial activity of two Streptomyces species isolated from Egyptian and Libyan soils

Scientific Journal for Damietta Faculty of Science
Volume 5, Issue 1, December 2015, Page 1-11  XML PDF (516.66 K)
Document Type: Original articles
DOI: 10.21608/sjdfs.2015.194450
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Authors
Ahmed K.A. El-Sayed email 1; Mohamed I. Abou-Dobara1; Nouria S. El-Manafi2
1Botany Department, Faculty of Science, Damietta University, New Damietta, Egypt
2Botany Department, Faculty of Science, Omer Al-Mokhtar University, Tobruk, Libya
Abstract
Sixty five actinomycetes isolates were collected from different Egyptian and Libyan soils. Forty eight isolates from the collected actinomycetes were found to be active against some tested pathogenic bacteria. Two different actinomycetes isolates (one from each country) which showed considerable higher antibacterial activity were identified as Streptomyces pluricolorescens and Streptomyces alni. They were also selected for optimizing the best conditions for their antibacterial activity production. The optimum incubation period, temperature and initial pH of medium for the maximum antibacterial yield were 5 days, 30oC and pH 7, respectively, for both of Streptomyces species. The maximum antibacterial production was observed on Dox and starch ammonium sulfate media for S. pluricolorescens, while starch nitrate was the most suitable media for S. alni antibacterial productivity. 
Keywords
Streptomyces; antibacterial activity; optimization
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