Comparative in vitro activity of S-4661, a new parenteral carbapenem, and other antimicrobial agents against respiratory pathogens

The activity of S-4661, a new parenteral carbapenem antibiotic, was evaluat ed against 202 recent clinical isolates of respiratory pathogens. S-4661 wa s similar to or 2 times more active than imipenem, meropenem, and biapenem, and 8-128 times more active than ceftazidime against gram-positive bacteri a. Against gram-negative bacteria, S-4661 was slightly less active than mer openem, but 2-8 times more active than the other agents. In particular, aga inst Pseudomonas aeruginosa S-4661 showed the most potent activity. Thus it was found that S-4661 possesses a potent and well-balanced activity agains t respiratory pathogens. Copyright (C) 2000 S. Karger AG, Basel.