Upper resp tract infections eg, tonsilitis, peritonsillar abscess, pharyngitis, laryngitis, sinusitis, secondary infections (influenza & common colds); lower resp tract infections eg, tonsilitis, acute & chronic bronchitis, pneumonia (lobar & primary atypical pneumonia, bronchopneumonia), bronchiectasis, Legionnaire's disease; ear infection eg, otitis media & externa mastoiditis; oral infections eg, gingivitis, Vincent's angina; ear infection eg, blepharitis; skin & soft tissue infection eg, boils & carbuncles, paronychia, abscesses, pustular acne, impetigo, cellulitis, erysipelas; GI infections eg, cholecystitis, staphylococcal enterocolitis. Pre- & post-op prophylaxis; operative trauma, burns, rheumatic fever. Other infections eg, osteomyelitis, urethritis, gonorrhea, syphilis, lymphogranuloma venereum, diphtheria, prostatitis, scarlet fever.