`` E. coli '' is the cause of 80 -- 85 % of community-acquired urinary tract infections , with `` Staphylococcus saprophyticus '' being the cause in 5 -- 10 % .
`` E. coli '' is the cause of 80 -- 85 % of urinary tract infections . `` Staphylococcus saprophyticus '' is the cause in 5 -- 10 % of cases .