hmm. Design an antibody for it. Use ELISA with secondary antibody

Get broth in ELISA microtiters. Read through ELISA plates. Scan loads of cultures.

thanks for your kind reply but without using ELISA , as enzyme is acyltransferase is it possible by using any biochemical reactions we can detect in broth itself?

Http://www.ncbi.nlm.nih.gov/pubmed/3867497

Http://www.invitrogen.com/1/1/2152-fast-cat-chloramphenicol-acetyltransferase-assay-kit.html

http://www.springerprotocols.com/Abstract/doi/10.1385/0-89603-481-X:71

yes if appropriate substrate is incorporated in media solid/liquid color change will occur. ref Dr K.Rajagopal, Uni. of .Madras