National Bank for Industrial Microorganisms and Cell Cultures
Abstract
The easy access and appropriate use of antimicrobials led to selection
and spread of resistant microorganisms strains. It is imperative to
search and screen for new and more effective antimicrobials from
microorganisms found in the environment. The objective of this work is
to isolate streptomycetes from soil of Kalubiya Governorate in order to
screen them for antimicrobial activity against reference Gram-positive,
Gram-negative bacteria as well as unicellular and filamentous fungi. A
total of 500 strains of streptomycetes were isolated. Sixty strains (12
%) showed antimicrobial activity. The morphological, cultural,
physiological and biochemical characters were studied for
identification of the isolates at species level. The obtain-ed results
revealed that the dominant group was Streptomyces lydicus