What causes false positive leukocytes in urine?
[19] Hematuria can cause a false positive result for urine WBCs. Leukocytes and WBCs may be present in urine due to other conditions such as appendicitis, diverticulitis, sexually transmitted infection, and renal injury. False negatives can occur in neutropenic/leukopenic patients.
What does a positive result for leukocyte esterase UA from a urinalysis mean?
Leukocyte esterase is a screening test used to detect a substance that suggests there are white blood cells in the urine. This may mean you have a urinary tract infection. If this test is positive, the urine should be examined under a microscope for white blood cells and other signs that point to an infection.
What can cause a false positive for UTI?
Causes of False-Positive and False-Negative Urinalysis Results
| Dipstick test | False positive |
|---|---|
| Ketones | Acidic urine, elevated specific gravity, mesna (Mesnex), phenolphthalein, some drug metabolites (e.g., levodopa) |
| Leukocyte esterase | Contamination |
| Nitrites | Contamination, exposure of dipstick to air, phenazopyridine |
Is it normal to always have leukocytes in urine?
If you’re healthy, you can still have elevated leukocytes in your bloodstream and urine. A normal range in the bloodstream is between 4,500-11,000 WBCs per microliter. A normal range in the urine is lower than in the blood, and may be from 0-5 WBCs per high power field (wbc/hpf).
What happens if leukocyte esterase is positive?
What can cause leukocytes in urine Besides UTI?
The following can also cause raised levels of leukocytes in the urine:
- some cancers, such as prostate, bladder, or kidney cancer.
- blood diseases such as sickle cell anemia.
- some pain relieving medicines.
- interstitial cystitis.
What causes high leukocytes?
High leukocytes in the blood may be due to the following: Infections, viruses or bacteria. Anaemia can also produce an increase in white blood cells. Symptoms of severe stress are also responsible for an increase in leukocytes. The consumption of certain types of medications, drugs or narcotics can also have the same effect.
What does a positive leukocyte screening test determine?
Higher levels of leukocytes in the bloodstream may indicate an infection . This is because WBCs are part of the immune system, and they help fight off disease and infection. Leukocytes may also be found in a urinalysis, or a urine test. High levels of WBCs in your urine also suggest that you have an infection.
What does positive leukocytes in urine mean?
When urine is positive for leukocytes, there are leukocytes in the urine. White blood cells in urine are typically a sign of infection. A urinalysis positive for leukoctyes is most commonly the result of a urinary tract infection. However, leukocytes in urine can also be a sign of other infectiona such as kidney infection, cystitis or urethritis.
What causes high WBC urine?
This may mean the following factors cause high blood cell count: High WBCs in urine may also mean a number of conditions like a urinary tract infection, bladder infection, kidney infection, kidney stones or tumor. It may indicate whooping cough, bacterial or viral infection, measles, allergy or leukemia.