Abstract
The in vitro susceptibility of 200 strains of coagulase-negative staphylococci isolated from blood cultures to 20 antimicrobial agents including the newer .beta.-lactam compounds was compared. Rifampicin, vancomycin, nafcillin and gentamicin were the most active drugs. The newer caphalosporins and related .beta.-lactam antibiotics did not exhibit superior activity.