<prompt> In Genitourinary TB, True is -Sterile pyuria is consistent findingAFB in early morning sample is always positiveMC site is pelvisCommonest cause of pyelonephritis  <response>: Sterile pyuria is the rule - But about 15-20 of patients with tuberculosis have a secondary pyogenic infection, obscuring the clue - sterile pyuria. The tubercle bacilli can be identified on AFB staining of 24 hr urine specimen or the first-morning urine sample collected on 3 successive days. AFB staining is positive in about 60 of cases - Smith Urology Most common site of genitourinary tuberculosis is - kidney The commonest cause of pyelonephritis is - E. coli Ref : Smiths Urology 17e p195, 219 