Other antibiotics that appear to be effective in vitro include chloramphenicol and tetracycline. For theoretical reasons, infection would not be expected to respond to penicillins, cephalosporins, or aztreonam, although carbapenems like meropenem or imipenem may possibly work.
Besides the antibiotics already mentioned, chloramphenicol and tetracycline appear effective against bacteria in laboratory settings. However, it is unlikely that penicillins, cephalosporins, or aztreonam would be effective against infections, although carbapenems like meropenem or imipenem might have some chance of working.