Can you have leukocyte esterase? (2023)

Asked by: Prof. Matteo Stroman Sr.

Score: 4.8/5 (65 votes)

Leukocyte Esterase: Leukocyte esterase is an enzyme present in your white blood cells. Therefore, the presence of this substance in the urine indicates the presence of white blood cells (leukocyturia). White blood cells in the urine may indicate inflammation of the kidneys or urinary tract due to bacterial infection.

Can you have leukocytes in urine without infection?

It is possible to have white blood cells in the urine without a bacterial infection. Sterile pyuria refers to the persistent presence of white blood cells in the urine when no bacteria are found to be present by laboratory examination.

Is leukocyte esterase in urine normal?

Leukocyte esterase

A few white blood cells are normally present in urine and usually give a negative chemical test result. When the number of WBCs in urine increases significantly, this screening test will become positive.

What happens if leukocyte esterase is positive?

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.

Do leukocytes in urine always mean infection?

If your doctor tests your urine and finds too many leukocytes, it could be a sign of infection. Leukocytes are white blood cells that help your body fight germs. When you have more of these than usual in your urine, it's often a sign of a problem somewhere in your urinary tract.

34 related questions found

(Video) Leukocyte Esterase Urine Test | Leukocytes In Urine | Causes & Symptoms Of High Leukocytes In Urine

How many leukocytes in urine is normal?

Diagnosis. 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).

Does Covid cause leukocytes in urine?

In our study, we have found increase white blood cells (WBC) in the urine of about half of the tested COVID-19 patients (Table 2). In most of the cases there was a negative bacterial urine culture.

What does it mean when you have leukocytes in urine but no nitrite?

Leukocytes in the urine without nitrite

If the test for leukocyte esterase is positive but finds no nitrite, an infection may still be present. The test is particular to certain bacterial enzymes, which means it can pick up specific bacterial infections with more certainty.

What should not be found in urine?

Usually, glucose, ketones, protein, and bilirubin are not detectable in urine.
...
The following are not normally found in urine:

  • Hemoglobin.
  • Nitrites.
  • Red blood cells.
  • White blood cells.

Why would you have white blood cells in your urine?

White blood cells in the urine may indicate inflammation of the kidneys or urinary tract due to bacterial infection. It is important to note, however, that contamination of the urine can also cause the presence of white blood cells in the urine, so remember to practice proper aseptic technique when giving the sample.

(Video) What is Leukocyte Esterase

Is WBC in urine serious?

Most causes of blood in your urine are not serious, But sometimes red or white blood cells in your urine can mean that you have a medical condition that needs treatment, such as a kidney disease, urinary tract infection, or liver disease.

How do I read my urine test results?

Normal values are as follows:

  1. Color – Yellow (light/pale to dark/deep amber)
  2. Clarity/turbidity – Clear or cloudy.
  3. pH – 4.5-8.
  4. Specific gravity – 1.005-1.025.
  5. Glucose - ≤130 mg/d.
  6. Ketones – None.
  7. Nitrites – Negative.
  8. Leukocyte esterase – Negative.

What indicates a urine infection on a dipstick?

Guidance from PHE [PHE, 2017] states that if dipstick is positive for nitrite or leukocyte and red blood cells (RBC) UTI is likely; if urine dipstick is negative for nitrite and positive for leukocyte, UTI is equally likely to other diagnoses; and if urine dipstick is negative for all nitrite, leukocyte and RBC UTI ...

What does it mean when you test positive for leukocytes and positive for nitrite?

A urine sample that tests positive for both nitrate and leukocyte esterase should be cultured for pathogenic bacteria. These tests are indirect ways of detecting bacteria in the urine. Significant urinary tract infections may be present in patients who do not experience other symptoms.

Do leukocytes in urine mean yeast infection?

Do not send urine for culture unless resident has symptoms of an infection. Positive leukocyte esterase and/or nitrites may indicate the presence of white blood cells (WBCs) or bacteria in the urine (bacteriuria), but it does not confirm that there is an infection.

(Video) Leukocytes in Urine - No Nitrates

Will chlamydia cause leukocytes in urine?

D. Sexually Transmitted Infections (STIs) A urinalysis can give clues to the presence of sexually transmitted infections. A positive dipstick for leukocyte esterase or increased numbers of white blood cells in the microscopic exam is suggestive of chlamydia or gonoccocal infection.

What infections can be found in urine?

The most common infections diagnosed by urinalysis are UTIs, which are one of the most common bacterial infections that require medical intervention. Several other infections such as community-acquired pneumonia and viremia infections can also be diagnosed with the help of urinalysis.

What can show up in a urine test?

Things the dipstick test can check for include:

  • Acidity, or pH. If the acid is abnormal, you could have kidney stones, a urinary tract infection (UTI), or another condition.
  • Protein. This can be a sign your kidneys aren't working right. ...
  • Glucose. ...
  • White blood cells. ...
  • Nitrites. ...
  • Bilirubin. ...
  • Blood in your urine.

Why has my urine sample been sent to the lab?

Doctors request a urine test to help diagnose and treat a range of conditions including kidney disorders, liver problems, diabetes and infections. Testing urine is also used to screen people for illicit drug use and to test if a woman is pregnant.

Which is more specific nitrite or leukocyte esterase?

Nitrite test was more specific (87%) than leukocyte esterase test (54%) or both tests taken together (50%). The predictive value of nitrite and leukocyte esterase together for a negative urine culture was 95%. Leukocyte esterase test sensitivity increased as the number of white blood cells on microscopy increased.

Does a yeast infection show up in a urine test?

A laboratory will test the urine for certain bacteria to diagnose the condition. A yeast infection will be diagnosed after taking a swab of the affected area. A laboratory will test the swab for the Candida fungus.

(Video) Leukocytosis, Causes, Signs and Symptoms, Diagnosis and Treatment.

Can you have a UTI with negative nitrites?

So, you can have a negative nitrite test and still have a UTI. This is why your doctor considers the result of many tests, not just one test, when diagnosing a UTI.

Can vitamins cause UTI symptoms?

Vitamin C. Many patients report that vitamin C causes bladder flares when they take supplements. There are studies that found vitamin C supplements can trigger the “need to go” in women. However, vitamin C naturally found in foods may not cause the same kind of bladder symptoms.

What is the most common antibiotic for a UTI?

Trimethoprim/sulfamethoxazole, nitrofurantoin, and fosfomycin are the most preferred antibiotics for treating a UTI.

What are types of leukocytes?

White blood cells are also called leukocytes. They protect you against illness and disease. Think of white blood cells as your immunity cells.
...
Types of white blood cells

  • Monocytes. ...
  • Lymphocytes. ...
  • Neutrophils. ...
  • Basophils. ...
  • Eosinophils.

FAQs

Is leukocyte esterase enough to diagnose UTI? ›

As shown in table 3, when it is used alone, the leukocyte esterase test has a relatively low sensitivity and specificity and low positive predictive values as a test for UTIs, with higher negative predictive values [28, 35, 38, 46–54].

Why do I have leukocytes in my urine but no infection? ›

Other causes

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.

Can leukocytes in urine be nothing? ›

A few white blood cells are normally present in urine and are generally not a cause of concern as they may not indicate an infection. High levels of WBCs in the urine typically suggest inflammation or infection. This occurs when the body tries to fight off an infection, typically in the urinary tract.

What does a small amount of leukocyte esterase 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.

Does leukocyte esterase always mean UTI? ›

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.

Can you have a UTI if you test leukocytes but no nitrite? ›

Leukocytes in the urine without nitrite

If the test for leukocyte esterase is positive but finds no nitrite, an infection may still be present. The test is particular to certain bacterial enzymes, which means it can pick up specific bacterial infections with more certainty.

Why do I keep testing positive for leukocytes in urine? ›

An infection in your urinary tract is the most likely cause of leukocytes in your urine. Any time you have an infection, your immune system ramps up production of these cells to fight off the bacteria.

Can inflammation cause leukocytes in urine? ›

Leukocytes in urine are often a sign of inflammation within the urinary tract infection. Leukocytes are white blood cells and their role in the immune system is to kill bacteria which may be present.

Does positive leukocytes always mean UTI? ›

Urinary tract infection test strips are a quick, easy, and cost effective way to test for a UTI at home. The test works by testing for nitrites and leukocytes in the urine. When both nitrites and leukocytes come up as positive, it is very likely a UTI is present.

Why am I having UTI symptoms but no infection? ›

If your urine culture shows you don't have a UTI, you'll need further testing to find out the cause of your symptoms.” In rare cases, a person with symptoms similar to a UTI, but with repeated negative cultures (meaning they don't show a bacterial infection) may in fact have bladder cancer.

What does 1+ leukocyte esterase mean? ›

A positive urine leukocyte esterase test indicates either a low urinary tract (bladder and urethra) infection or specimen contamination.

What should your leukocyte count be in urine? ›

The typical range for leukocytes in your urine is 0–5 white blood cells per high power field (WBC/HPF). This means that doctors will usually only see between 0 and 5 white blood cells when examining a urine sample under a high powered microscope. Higher levels of leukocytes can indicate the presence of an infection.

What antibiotic treats leukocytes in urine? ›

Ciprofloxacin (Cipro) or levofloxacin (Levaquin)

These types of antibiotics work slightly better than amoxicillin/potassium clavulanate, cefdinir, and cephalexin. But the risk of serious side effects is higher. Healthcare providers usually save these antibiotics for more complicated or severe types of UTIs.

How do you get rid of leukocytes in urine without antibiotics? ›

Drink parsley water: It is a natural diuretic and can help flush out your system. Consume more blueberries: They contain ingredients that can work to prevent and treat UTIs. Consume diluted apple cider vinegar: It is a natural antibacterial, so it can help fight off bacteria in the urinary system.

Which is more indicative of UTI leukocytes or nitrites? ›

Therefore, the clinical impression that leukocyte esterase is the more sensitive test (more likely to be the sole indicator of UTI) and that the presence of nitrite is highly specific (i.e., highly predictive of UTI) appears to still hold.

Can stress increase leukocytes in urine? ›

We concluded from the above study that percentage of normal individuals having leukocytes in their urine is greater than happy individuals. So, there is a connection between normal individuals and anxiety level.

What can be mistaken for a UTI? ›

What could be mistaken for a UTI? There are several conditions whose symptoms mimic UTIs. Sexually transmitted infections (gonorrhea, chlamydia, and mycoplasma) cause symptoms also common in UTIs, such as painful urination and discharge.

How can you tell the difference between a UTI and a bladder infection? ›

Bladder infections are a type of UTI, but not all urinary tract infections are bladder infections. A UTI is defined as an infection in one or more places in the urinary tract—the ureters, kidneys, urethra, and/or bladder. A bladder infection is a UTI that's only located in the bladder.

Can you have a UTI without a bacterial infection? ›

Myth: All UTIs cause symptoms.

However, it is possible to have bacteria in the urinary tract but not have any UTI symptoms. This is called asymptomatic bacteriuria, and it is more common in older adults or people who use a catheter to empty their bladders.

How many leukocytes is a UTI? ›

Most authorities suggest that more than 5 to 10 white blood cells per high-powered field on catheter specimen in the presence of a suggestive clinical picture should be presumed to represent a true urinary tract infection until proven otherwise by a negative culture.

How high is too high for leukocytes? ›

In general, for adults a count of more than 11,000 white blood cells in a microliter of blood is considered high.

What is an abnormal leukocyte count? ›

A count less than 4,500 cells per microliter (4.5 × 109/L) is below normal. Neutrophils are one type of WBC. They are important for fighting infections. A lower than normal WBC count may be due to: Bone marrow deficiency or failure (for example, due to infection, tumor, or abnormal scarring)

How many leukocytes indicate a UTI? ›

You're bound to have a few WBCs in your urine even when you're healthy, but if a urine test identifies levels above 5 wbc/hpf, it's likely you have an infection. If bacteria are detected, your doctor may perform a urine culture to diagnose the type of bacterial infection you have.

Can you have a UTI with a normal WBC? ›

The WBC count may or may not be elevated in patients with uncomplicated UTI, but it usually is elevated in patients with complicated UTIs.

What indicates a UTI in a urinalysis? ›

Nitrite urine test: A positive nitrite test result can indicate a urinary tract infection (UTI). However, not all bacteria are capable of converting nitrate (a substance that's normally in your urine) to nitrite, so you can still have a UTI despite a negative nitrite test.

Do I need antibiotics for leukocytes in urine? ›

Treatment for leukocytes in urine will depend on the underlying cause. Antibiotics are a common treatment for bacterial infections, while other conditions like kidney stones or cancer may require surgery or other treatments.

How much leukocyte esterase in urine is normal? ›

The reference ranges for leukocytes in urine are as follows: Normal 0 to 10 leukocytes/μL. Borderline 10 to 20 leukocytes/μL. Pathological greater than 20 leukocytes/μL.

How can I get rid of leukocytes in my urine naturally? ›

Drink parsley water: It is a natural diuretic and can help flush out your system. Consume more blueberries: They contain ingredients that can work to prevent and treat UTIs. Consume diluted apple cider vinegar: It is a natural antibacterial, so it can help fight off bacteria in the urinary system.

Does all UTI show up in urine test? ›

If the bacteria are not floating around in the urine, they will not be passed into your sample on urination. If the bacteria are not in your sample, they will not be detected. There are other reasons your sample may not contain detectable levels of bacteria, including over-hydration.

What are 3 symptoms of a UTI? ›

Symptoms
  • Pain or burning while urinating.
  • Frequent urination.
  • Feeling the need to urinate despite having an empty bladder.
  • Bloody urine.
  • Pressure or cramping in the groin or lower abdomen.

What test results confirm UTI? ›

The two most common tests to detect UTIs are a urinalysis and a urine culture with antimicrobial susceptibility testing: Urinalysis: A urinalysis is a group of physical, chemical, and microscopic tests on a sample of urine. These tests look for evidence of infection, such as bacteria and white blood cells.

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