Biologically pure culture of the microorganism of Streptomyces avermitilis, process for producing at least one composed of avermectin and avermectin thus produced.Process for producing ivermectin and ivermectin thus produced.

摘要

A new microorganism, Streptomyces avermitilis subspecies niger NRRL 21005, and processes using the microorganism for producing known avermectins and ivermectin are provided.