Back in Feb I went into acute renal failure due to diuretics to treat a heart issue. At the time my gfr was 14. It has since improved as it is now at 60. But since then I have had quite a bit of microscopic hematuria. Protein and RBC. After a couple different urine cultures, my dr has decided I need to be referred to a nuphrologist for a kidney biopsy. My most recent culture did show 3+ bacteria and 9 hpf wbc with 3+ blood and 2.0 urobilnohen and large amount of mucous and 6 cast, hyaline. Now to me it looks like a UTI. But it also shows no growth. How can there be bacteria in there with no growth???