New antiviral antibiotics, Kistamicins A and B. I. Taxonomy, production, isolation, physico-chemical properties and biological activities.

Abstract

A new strain of Microtetraspora parvosata subsp. kistnae subsp. nov. (ATCC 55076) was found to produce new antiviral antibiotics, designated kistamicins A and B. These antibiotics exhibited activity against influenza virus type A and moderate activity against Gram-positive bacteria.