Infections caused by susceptible microorganisms including upper & lower resp tract eg, sinusitis, otitis media, & epiglottitis, bacterial pneumonias, UTI & pyelonephritis. Intra-abdominal eg, peritonitis, cholecystitis, endometritis & pelvic cellulitis, bacterial septicemia, skin, soft tissue, bone & joint, gonococcal infections & incidence of post-op wound infections.