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.
The text discusses the effectiveness of various antibiotics against bacteria in vitro and suggests that while some antibiotics may not work against certain infections, others might have a chance of working.