[Investigation on effectiveness and safety of fosfomycin in treatment of patients with allergy induced by antibacterial agents].

Twenty-four patients with urinary tract infections were treated with fosfomycin (FOM) to evaluate its effectiveness and safety. They all had shown allergic reactions, mainly to beta-lactams. Lymphocyte stimulation test (LST), leukocyte migration inhibition test (LMT), passive cutaneous anaphylaxis (PCA) and the precipitin reaction were performed to test whether FOM would also cause an allergic reaction. FOM was judged by the physician-in-charge to be effective in all 6 patients (100%) with acute simple cystitis and 8 (72.7%) of 11 patients with chronic complicated urinary tract infections. The drug was also effective in 15 (83.3%) of 18 patients with epididymitis, etc. Regarding the usefulness of FOM, it was judged to be useful in 21 (91.3%) of 23 patients. FOM was very useful in 8 (34.8%) of these 23. In patients tested for LST, the value was lower in cases given FOM than in cases given ampicillin (ABPC), cefazolin (CEZ) or latamoxef (LMOX); there was an especially significant (p less than 0.01) difference with ABPC. All the drugs tested were negative for the LMT, PCA and precipitin reaction tests. No subjective or objective abnormalities were attributed to the FOM treatment, and there were also no abnormal laboratory test values. FOM was evaluated to be an effective and safe antibacterial agent without in vitro or clinical allergic reactions.