STUDIES ON THE MECHANISM OF THE LOSS OF CHLORAMPHENICOL RESISTANCE IN ESCHERICHIA COLI,

Abstract
The loss of resistance to chloramphenicol in an extremely resistant strain of E. coli. strain B, was studied. This instability is caused primarily by the selection of sensitive mutants which overgrow the resistant cells in media free of the antibiotic. Preliminary observations indicate that more than 1 type of sensitive mutant may be involved.