Cystitis laboratory findings: Difference between revisions
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==Overview== | ==Overview== | ||
Laboratory tests used in the diagnosis of cystitis include [[urinalysis]] and [[urine culture]]. | Laboratory tests used in the diagnosis of cystitis include [[urinalysis]] and [[urine culture]]. Laboratory findings consistent with the diagnosis of cystitis include pyuria and either [[white blood cell]]s (WBCs) or [[red blood cells]] (RBCs) on urinalysis and a positive urine culture. | ||
==Laboratory Findings== | ==Laboratory Findings== |
Revision as of 21:15, 11 February 2016
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Steven C. Campbell, M.D., Ph.D.
Overview
Laboratory tests used in the diagnosis of cystitis include urinalysis and urine culture. Laboratory findings consistent with the diagnosis of cystitis include pyuria and either white blood cells (WBCs) or red blood cells (RBCs) on urinalysis and a positive urine culture.
Laboratory Findings
Urinalysis
- A urinalysis commonly reveals white blood cells (WBCs) or red blood cells (RBCs).
- Pyuria: >5-10 WBC/hpf or 27 WBC/microliter
- Dipstick:
- Nitrate reductase test: The nitrate reductase test is a test to differentiate between bacteria based on their ability or inability to reduce nitrate (NO3) to nitrite (NO2) using anaerobic respiration.
- Leukocyte esterase: Leukocyte esterase (LE) is a urine test for the presence of white blood cells and other abnormalities associated with infection.
Urine Culture
- A urine culture (clean catch) or catheterized urine specimen may be performed to determine the type of bacteria in the urine and the appropriate antibiotic for treatment.
- Most patients with urinary tract infection will have > 100,000 colonies of organism.