Chloramphenicol acetate is an acetylated and inactive version of chloramphenicol. It is formed in E. coli and S. aureus by the inducible enzyme chloramphenicol acetyltransferase in the presence of acetyl coenzyme A (acetyl-CoA; ) to confer chloramphenicol resistance. Chloramphenicol acetate has no antibiotic activity against S. sonnei in a turbidimetric assay.
