Full Length Research Paper

Characterization of Streptomyces strain SLO-105 isolated from Lake Oubeira sediments in North-East of Algeria

Houda Morakchi^1,2*, Adel Ayari¹, Mira Taok², Djamila Kirane¹ and Nelly Cochet²

¹Applied Microbial Laboratory, Department of Microbiology and biochemistry, Badji Mokhtar University, P.O. Box 12. 23000 Annaba, Algeria.

²University of Technology of Compiegne. BP 20 529. 60 205. Compiegne, France.

*Corresponding author. E-mail: hmorakchi@yahoo.fr.

Accepted 29 September, 2009

   Abstract

A microbial strain, SLO-105, isolated from Lake Oubeira sediment was screened for its antimicrobial activity against pathogenic bacteria and fungi. The strain showed broad-spectrum antibacterial activity against Gram-positive bacteria Staphylococcus aureus MRSA, Bacillus subtilus, Micrococcus leutus, Streptococcus fecalis and fungi Aspergillus niger and Rodotorulla mucilaginosa. However, no activity of the strain was observed against Gram negative bacteria Escherichia coli and Pseudomonas aeruginosa as well as on fungi Candida albicans. Analysis of 16S rDNA sequence and the morphological and physiological characteristics of the strain suggested that the isolate belonged to Streptomyces genus.

Key words: Streptomyces, rDNA analysis, micro-morphology, physiology, antimicrobial.