WBC >5 in patient with appropriate symptoms is diagnostic
Lower degrees of pyuria may still be clinically significant in presence of symptoms
False negative may be due to: dilute urine, systemic leukopenia, obstruction, recent antibiotic use with incomplete treatment
WBC 1-2 with bacteriuria can be significant in men
More likely represents urethritis or prostatitis from STI
High WBCs w/o bacteria, consider TB, Chlamydia, Appendicitis
Lower degrees of pyuria may still be clinically significant in presence of symptoms
False negative may be due to: dilute urine, systemic leukopenia, obstruction, recent antibiotic use with incomplete treatment
WBC 1-2 with bacteriuria can be significant in men
More likely represents urethritis or prostatitis from STI
High WBCs w/o bacteria, consider TB, Chlamydia, Appendicitis
False negative may be due to: dilute urine, systemic leukopenia, obstruction, recent antibiotic use with incomplete treatment
More likely represents urethritis or prostatitis from STI
Found in PMNs
High sensitivity
Low specificity
Very high specificity (>90%) in confirming diagnosis
Low sensitivity (enterococcus, pseudomonas, acinetobacter are not detected)
Indicated for:
Complicated<unk> 
Pyelonephritis
Pregnant women
Children
Adult males
Relapse/reinfection
Complicated<unk> 
Pyelonephritis
Pregnant women
Children
Adult males
Relapse/reinfection
Not indicated
Organisms in blood cultures matched those in urine cultures 97% of time
Organisms in blood cultures matched those in urine cultures 97% of time
Acute cystitis
Pyelonephritis
Interstitial cystitis
Infected kidney stone
Pelvic origin
Pelvic inflammatory disease
Prostatitis
Ectopic