This antibiotic is effective against certain spirochetes
These agents are not effective against beta-lactamase producing organisms... [DOC] [TLE] Chloramphenicol | definition of chloramphenicol by Medical dictionary [PAR] /chloramphenicol/ (kloram-fen-kol) a broad-spectrum antibiotic effective 
against rickettsiae, gram-positive and gram-negative bacteria, and certain... [DOC] [TLE] Identification of novel activity against Borrelia burgdorferi ... - Nature [PAR] Jul 2, 2014 ...