Sorbistin, a new aminoglycoside antibiotic complex of bacterial origin. I. Production, isolation and properties.

Abstract
A strain of a new Pseudomonas sp. produced the aminoglycoside antibiotic complex, sorbistin, which was separated by ion-exchange chromatography into 3 bio-active components A1, A2 and B, and 2 bio-inactive components C and D. Sorbistins A1, A2 and B showed moderate intrinsic activity against a wide range of bacterial [and fungal] species and inhibited most of the aminoglycoside-resistant organisms. Sorbistin A1 exhibited the highest activity among the 3 bio-active components. Sorbistins showed low order of acute toxicity in mice.