Asymptomatic bacteriuria, what are you treating?

A man in his 80s with a history of interstitial lung disease, DVT on warfarin, and chronic venous stasis came to the emergency department (ED) with swelling of his bilateral lower extremities. He had no other symptoms. A urinalysis was obtained which demonstrated pyuria and positive leukocyte esterase. His urine was sent for culture and in the meantime he was given a dose of ceftriaxone for a presumed urinary tract infection (UTI). He was subsequently admitted for concern of right-sided heart failure complicating his chronic venous stasis.