Antibacterial Activity of The Nucleoside Antibiotic (NA) Isolated from Streptomyces alboflavus

Abstract

During this study a new antibiotic was isolated from Streptomyces alboflavus which
was active against Gram-positive and Gram-negative bacteria .The isolate antibiotic was
white crystalline powder at (28-30)C˚. Physicochemical properties were studied includes
TLC, IR spectroscopy and Uv spectrum as well as color tests, all these studies indicate that
the antibiotic produced by Streptomyces sp. Is a nucleoside antibiotic and gave the name
(NA).The minimal inhibitory concentration of produced nucleoside antibiotic were
determined against five standard gram positive positive and gram negative bacteria with
MIC value ranged (2-25) µ/ml .