The Relationship Between Aureomycin, Chloramphenicol, and Terramycin

Abstract
Escherichia coli D 56 and Micrococcus pyogenes var. aureus 209P on becoming resistant to aureomycin also become resistant at somewhat lower levels to chloramphenicol and terramycin. Similarly, on becoming resistant to chloramphenicol the 2 organisms become resistant at lower levels to aureomycin and terramycin.