Group b strep uti, on keflex for 7 days still having symptoms, is there a better antiboitic for this class of uti?

Strange: Group b strep is usually exquisitely sensitive to penicillin and its derivatives, like amoxicillin. Should also respond appropriately to Cephalexin (keflex). There is a small number of patients, however, who do not absorb Keflex from their GI tract. Advise you to go back and see your doctor and get re-cultured and re-evaluated. If this was upper tract UTI you should not be on oral therapy. Go.