B-1008, a new antibiotic of bacterial origin containing a spermidine moiety. Production, isolation, characterization and biological properties

A new antibiotic, B-1008 has been isolated from the cultured broth of Pseudomonas fluorescens No. 101 B-13L. B-1008 is a water-soluble basic substance containing the spermidine moiety and possessing antibacterial activity against a wide range of bacterial species.