Abstract
An antibiotic was isolated from the culture filtrates of Streptomyces lavendulae and named yazumycin. It was isolated from the broth using cation exchange resin and purified by cellulose chromatography. Yazumycin exhibited inhibitory activities against bacteria, especially Gram-negative bacteria such as Xanthomonas oryzae, Xanthomonas citri and Escherichia coli. No toxicity to mice was shown by intravenous injection of 200 mg/kg.
