This study involved isolation and diagnosis of a few species of the filamentous bacteria of genus Streptomyces from 50 soil samples collected from different regions of Kirkuk province, Iraq. Thirteen Streptomyces spp, S. bambergiensis, S. rimosus, S. longisporoflavus, S. canus, S. pactum, S. glaucescens S. chromogenus, S. xanthochromogenes, S. varsoviensis, S. roseus, S. violaceaniger, S. thermorulgaris, S. albus were isolated and all proved to produce antibiotics. Their inhibitory metabolic potency has also been assessed against Bacillussubtilis, Escherichia coli, Pseudomonas fluorescens, Aspergillus spp, Candida albicans, Streptococcus pyogenes, Salmonella typhi and Trichophyton mentagrophytes. The potency of these pathogens was tested for the ability to inhibit pathogenic micro-organisms of S. albus, S. rimosus, S. pactum, S. violaceaniger, S. roseus. The S. violaceaniger showed stronger inhibitory effect against most pathogenic micro-organisms. It is concluded that these species could possibly produce new powerful antibiotics against pathogenic micro-organisms which could be further used for clinical application.
 

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