The in vitro activity of sulfonamides was assessed by determination of minimuminhibitory concentration and zone diameter breakpoints using the methodology andcriteria recommended by the National Committee for Clinical Laboratory Standards(NCCLS) and British Society for Antimicrobial Chemotherapy (BSAC). The efficacy oftreatments of sulfonamides in vivo after experimental infection of fish was also evaluated.2 - 11 *1046052202171*1046052202171 2003/02/24 10:03:22