# 10 Urine Test Strip Parameters Explained: LEU, NIT, URO, PRO, pH, BLO, SG, KET, BIL & GLU **By Dr Pramod kumar** · 2026-10-07 ## What Are the 10 Parameters on a Urine Test Strip? A **10-parameter urine test strip** contains multiple chemically treated reagent areas that allow several urine chemistry markers to be screened from a single specimen. A common 10-parameter configuration includes: - **LEU** – Leukocytes - **NIT** – Nitrite - **URO** – Urobilinogen - **PRO** – Protein - **pH** – Acidity / Alkalinity - **BLO** – Blood - **SG** – Specific Gravity - **KET** – Ketones - **BIL** – Bilirubin - **GLU** – Glucose Together, these parameters provide a broad **urine chemistry screening profile** that can contribute useful information about urinary tract findings, glucose and ketone metabolism, urine concentration and other biochemical changes. However, a urine reagent strip is primarily a **screening and monitoring tool**. Individual results should not be interpreted as a standalone medical diagnosis. For a broader introduction to urinalysis, read our [**Urinalysis & Urine Test Strips Complete Guide**](https://microsidd.com/blogs/knowledge-hub/urinalysis-urine-test-strips-complete-guide). ## 10 Urine Test Strip Parameters at a Glance Abbreviation Parameter What It Screens **LEU** Leukocytes Leukocyte activity in urine **NIT** Nitrite Nitrite produced by certain bacteria **URO** Urobilinogen Urobilinogen present in urine **PRO** Protein Protein present in urine **pH** Urine pH Relative acidity or alkalinity **BLO** Blood Blood-related reactions in urine **SG** Specific Gravity Relative urine concentration **KET** Ketones Ketone bodies detected by the reagent system **BIL** Bilirubin Bilirubin present in urine **GLU** Glucose Glucose present in urine ## 1\. LEU – Leukocytes in Urine **LEU** stands for **leukocytes**, commonly known as white blood cells. The leukocyte reagent area is designed to screen for leukocyte-associated activity in the urine specimen. Leukocytes may be present when inflammation or infection affects the urinary tract, but a positive LEU result does not by itself establish the cause. ### What Can a Positive LEU Result Mean? A positive leukocyte result may be seen in several situations, including urinary tract inflammation or infection. Interpretation should consider: - Urinary symptoms - Nitrite result - Specimen collection quality - Microscopy findings where available - Urine culture where clinically required ### Does Positive LEU Confirm a UTI? No. Leukocytes can contribute to **UTI screening**, but a positive result alone does not confirm a urinary tract infection. ## 2\. NIT – Nitrite in Urine **NIT** stands for **nitrite**. Certain bacteria can convert naturally occurring urinary nitrate into nitrite. A positive nitrite reagent-pad result can therefore contribute useful information during urinary tract screening. ### Does Positive Nitrite Mean a UTI? A positive nitrite result may support suspicion of bacterial urinary tract infection in the appropriate clinical setting, but it should not be treated as definitive by itself. ### Can a UTI Have a Negative Nitrite Result? Yes. A negative nitrite result does not rule out infection because: - Not all urinary bacteria produce nitrite. - The urine may not have remained in the bladder long enough for detectable nitrite to form. - Dietary nitrate availability varies. - Specimen handling and other factors can influence results. ## LEU + NIT Together: What Do They Tell Us? Leukocytes and nitrite are commonly interpreted together during urinary tract screening. LEU NIT General Screening Interpretation Negative Negative No positive LEU/NIT screening signal, but infection is not completely excluded Positive Negative Leukocytes detected; interpret with symptoms and additional testing Negative Positive Nitrite detected; bacterial involvement may be considered Positive Positive Both screening markers present; clinical evaluation may be appropriate **This table is for general educational understanding only and is not a diagnostic algorithm.** ## 3\. URO – Urobilinogen in Urine **URO** stands for **urobilinogen**. Urobilinogen is formed during the normal metabolism of bilirubin and can be present in urine within expected ranges. The reagent area provides screening information about the amount of urobilinogen detected in the specimen. ### What Does Abnormal Urobilinogen Mean? Changes in urinary urobilinogen can occur for different reasons and should not be interpreted independently as a diagnosis. Interpretation may need to consider: - Bilirubin result - Other laboratory tests - Clinical history - Symptoms - Medication and specimen factors ## 4\. PRO – Protein in Urine **PRO** stands for **protein**. The protein reagent area screens for protein in the urine specimen and is generally more sensitive to albumin than to some other urinary proteins. ### Does Protein in Urine Mean Kidney Disease? Not necessarily. Protein may occur temporarily or persistently for a variety of reasons. A single positive urine protein strip result should therefore not automatically be interpreted as kidney disease. Repeated or unexpected findings may require appropriate laboratory and clinical evaluation. ### Focused Glucose + Protein Testing If glucose and protein are the only two parameters required, a focused two-parameter strip may be more appropriate than a full 10-parameter product. [**View Microsidd Glucose + Protein Urine Test Strips →**](https://microsidd.com/products/urine-glucose-protein-strips-microsidd) [**View Mission 2GP Glucose + Protein Urine Test Strips →**](https://microsidd.com/products/mission-urine-strips-2gp) ## 5\. pH – Urine Acidity and Alkalinity The **pH** reagent area indicates whether the urine specimen is relatively acidic or alkaline. Urine pH can vary naturally and may be influenced by factors including: - Diet - Metabolism - Medication - Specimen age - Urinary conditions - Other physiological factors A urine pH result should therefore be interpreted in context rather than treated as a disease-specific marker. ### Why Can an Old Urine Sample Affect pH? Urine chemistry can change after collection. Delayed testing or inappropriate storage may alter specimen characteristics and affect interpretation. Fresh urine is generally preferred for routine reagent-strip testing unless the specific testing protocol states otherwise. ## 6\. BLO – Blood in Urine **BLO** refers to the reagent area used to screen for **blood-related reactions** in urine. The reagent system may respond to components associated with red blood cells, hemoglobin or myoglobin depending on the product and specimen conditions. ### What Does a Positive Blood Result Mean? An unexpected positive result can occur for several possible reasons and should not automatically be assigned to a specific condition. Persistent or clinically significant findings may require additional investigation such as microscopy or other laboratory testing. ## 7\. SG – Specific Gravity **SG** stands for **specific gravity**. Specific gravity provides an estimate of the relative concentration of the urine specimen. More concentrated urine generally has a higher specific gravity, while more dilute urine generally has a lower value. ### What Influences Urine Specific Gravity? Factors can include: - Fluid intake - Fluid loss - Timing of collection - Solutes present in the urine - Physiological and clinical circumstances Specific gravity can contribute useful information about urine concentration but should not be treated by itself as a measurement of kidney function. ## 8\. KET – Ketones in Urine **KET** stands for **ketones**. Ketones are produced when the body uses fat as an important source of energy. Urinary ketones may be detected in situations including: - Fasting - Reduced carbohydrate intake - Prolonged exercise - Vomiting - Illness - Inadequate insulin availability ### Are Urine Ketones Always Abnormal? No. The significance depends on the person's circumstances. However, significant ketones in a person with diabetes—particularly when accompanied by high blood glucose, vomiting, abdominal pain, rapid breathing, weakness, confusion or other concerning symptoms—may require prompt medical assessment. ### Focused Glucose + Ketone Testing If glucose and ketones are the only required parameters, choose a focused GLU + KET reagent strip. [**View Microsidd Glucose + Ketone Urine Test Strips →**](https://microsidd.com/products/glucose-ketone-urine-test-strips-100-microsidd) [**View Mission 2GK Glucose + Ketone Urine Test Strips →**](https://microsidd.com/products/mission-urine-ketone-strips-2gk) ## 9\. BIL – Bilirubin in Urine **BIL** stands for **bilirubin**. The bilirubin reagent area screens for bilirubin present in the urine specimen. An unexpected bilirubin result may require additional evaluation, but the reagent-strip result alone cannot diagnose a liver or biliary condition. ### Bilirubin vs Urobilinogen Bilirubin and urobilinogen are related through bilirubin metabolism but represent different urine chemistry parameters. They should be considered together with other laboratory findings and clinical information rather than interpreted in isolation. ## 10\. GLU – Glucose in Urine **GLU** stands for **glucose**. The glucose reagent area screens for glucose present in the urine specimen. The kidneys normally reabsorb most filtered glucose. Urinary glucose may appear when blood glucose rises above the kidney's ability to reabsorb glucose, although other causes are possible. ### Can Urine Glucose Diagnose Diabetes? No. Urinary glucose provides indirect screening information and does not directly measure current blood glucose concentration. Diagnosis and monitoring of diabetes may require appropriate blood glucose testing, HbA1c and clinical evaluation. ### Urine Glucose vs Blood Glucose Urine Glucose Blood Glucose Detects glucose excreted into urine Measures glucose directly in blood Indirect screening information Direct glucose measurement Influenced by renal glucose threshold Reflects blood glucose at the time of testing Uses urine reagent strips Usually uses a compatible glucose meter and strip ## How the 10 Parameters Work Together The main advantage of a 10-parameter urine strip is not simply that it performs more tests. It provides a broader biochemical picture from one urine specimen. For example: Parameter Combination Why They May Be Considered Together LEU + NIT Common urinary tract screening combination GLU + KET Glucose and ketone metabolism screening PRO + BLO + SG Can contribute information during broader urinary assessment BIL + URO Related biochemical urine screening parameters pH + SG Provides basic information about urine characteristics These combinations do not form standalone diagnostic panels. They are simply examples of why several urine chemistry parameters may be useful when interpreted together. ## Which 10-Parameter Urine Test Strips Are Available? Microsidd currently offers options for broader 10-parameter urine chemistry screening. ### Microsidd URS10T [**Microsidd URS10T**](https://microsidd.com/products/microsidd-urs10t-complete-urinalysis-10-parameter-urine-test-strips) screens: **LEU, NIT, URO, PRO, pH, BLO, SG, KET, BIL and GLU.** It is supplied as a 100-test pack for visual urine chemistry testing. [**View Microsidd URS10T 10-Parameter Urine Test Strips →**](https://microsidd.com/products/microsidd-urs10t-complete-urinalysis-10-parameter-urine-test-strips) ### Mission 10U Microsidd also supplies [**Mission 10U Urinalysis Reagent Strips**](https://microsidd.com/products/mission-urine-strips-10u) for broader multi-parameter urine chemistry screening. [**View Mission 10U →**](https://microsidd.com/products/mission-urine-strips-10u) ## 10-Parameter Strip vs 2-Parameter Strip Testing Requirement Recommended Strip Type Glucose + Protein only GLU + PRO 2-parameter strip Glucose + Ketones only GLU + KET 2-parameter strip Glucose only Single-parameter glucose strip Broader routine urine chemistry screening 10-parameter strip More parameters are not automatically better. The correct product is the one that matches the intended testing requirement. For a detailed buyer comparison, read: [**Urine Test Strips Comparison: Glucose + Protein vs Glucose + Ketone vs 10 Parameter →**](https://microsidd.com/blogs/knowledge-hub/urine-test-strips-comparison) ## How to Use a 10-Parameter Urine Test Strip The exact procedure and reading times vary by manufacturer, so always follow the **Instructions for Use supplied with the specific product**. A typical procedure involves: 1. Collecting a fresh urine specimen in a clean, suitable container. 2. Removing one reagent strip without touching the test pads. 3. Closing the strip container immediately. 4. Immersing all reagent areas into the urine specimen according to the product instructions. 5. Removing the strip after the specified immersion period. 6. Removing excess urine as instructed. 7. Allowing the reagent reactions to develop. 8. Comparing each pad with the correct parameter row on the colour chart at its specified reading time. 9. Recording the results where required. 10. Disposing of the used strip appropriately. ## Why Each Parameter Has Its Own Reading Time Different reagent chemistries do not necessarily react at the same speed. This means the leukocyte pad, glucose pad, protein pad and other reagent areas may have different recommended interpretation times. Reading every pad at one arbitrary time can reduce the reliability of visual interpretation. **Always use the timing instructions supplied with the exact strip.** ## Use the Correct Colour Chart Urine test strip colour charts are product-specific. Do not use: - A colour chart from another brand - A chart from a different parameter configuration - An internet image instead of the chart supplied with the test - A faded or damaged reference chart where accurate colours cannot be distinguished The chemical formulation and colour scales can differ between reagent-strip systems. ## Collecting the Urine Sample Good testing begins with suitable specimen collection. A clean urine specimen container helps provide a practical sample for reagent-strip testing while reducing external contamination. [**View Urine Specimen Container →**](https://microsidd.com/products/urine-container-sterile-50ml) Special tests such as urine culture, timed urine collection or other investigations may require different collection methods. ## Visual Reading vs Urine Analyzer Many multi-parameter urine strips are designed for visual interpretation, but compatible professional reagent strips may also be read using urine chemistry analyzers. Visual Reading Analyzer Reading Operator compares colours Analyzer measures reagent-pad reflectance Useful for lower testing volumes Useful for repeated laboratory workflows Manual result recording May support storage and printing Lighting and operator perception can influence interpretation Improves standardization of compatible strip reading Microsidd's professional urine chemistry range includes the [**Mission U120 Urine Analyzer**](https://microsidd.com/products/urine-analyzer-u120) and [**Mission U500 Urine Analyzer**](https://microsidd.com/products/mission%C2%AE-u500-urine-analyzer). **Important:** Do not assume that every urine reagent strip is compatible with every urine analyzer. Always confirm the exact strip configuration and analyzer model. ## Common Causes of Misleading Urine Strip Results Reagent-strip results can be affected before, during and after testing. Potential sources of error include: - Old or improperly stored urine specimens - Contaminated specimen containers - Expired reagent strips - Moisture exposure - Leaving the strip container open - Touching reagent pads - Incorrect immersion technique - Failure to remove excess urine appropriately - Incorrect reading times - Poor lighting during visual interpretation - Using the wrong colour chart ## How Should Urine Test Strips Be Stored? Urine reagent strips contain chemically reactive test areas and should be handled carefully. - Keep strips in their original container. - Close the container immediately after removing a strip. - Protect from excessive moisture. - Protect from excessive heat and direct sunlight. - Do not touch the reagent areas. - Do not transfer strips between containers. - Follow the storage temperature stated by the manufacturer. - Observe opened-container stability where applicable. - Do not use after the stated expiry date. ## Can One Abnormal Parameter Diagnose a Disease? No. A positive reagent-pad result is a **screening finding**, not automatically a diagnosis. Results may need to be considered alongside: - Symptoms - Patient history - Medication - Diet - Hydration - Other urine parameters - Blood investigations - Microscopy - Urine culture - Clinical examination ## Explore the Microsidd Urine Chemistry Range Microsidd's Urine Chemistry collection includes focused reagent strips, multi-parameter urinalysis strips, professional analyzers, specimen containers and analyzer accessories. [**Explore the Complete Urine Chemistry Collection →**](https://microsidd.com/collections/urine-chemistry) For a broader introduction to urine testing: [**Read the Urinalysis & Urine Test Strips Complete Guide →**](https://microsidd.com/blogs/knowledge-hub/urinalysis-urine-test-strips-complete-guide) ## Frequently Asked Questions ### What are the 10 parameters on a urine test strip? A common 10-parameter configuration includes leukocytes, nitrite, urobilinogen, protein, pH, blood, specific gravity, ketones, bilirubin and glucose. ### What does LEU mean on a urine strip? LEU stands for leukocytes. The reagent area screens for leukocyte-associated activity in the urine specimen. ### What does NIT mean? NIT stands for nitrite. Certain bacteria can convert urinary nitrate into nitrite. ### What does URO mean? URO stands for urobilinogen, a substance related to bilirubin metabolism. ### What does PRO mean? PRO stands for protein. The reagent area screens for protein present in urine. ### What does BLO mean? BLO is the blood reagent area, which screens for blood-related reactions in urine. ### What does SG mean? SG stands for specific gravity, which provides an estimate of urine concentration. ### What does KET mean? KET stands for ketones. Urinary ketones may occur when the body is using fat as an important energy source. ### What does BIL mean? BIL stands for bilirubin. ### What does GLU mean? GLU stands for glucose. Urine glucose testing screens for glucose excreted into the urine. ### Do leukocytes and nitrite mean I have a UTI? Not necessarily. These parameters can contribute to urinary tract screening, but they do not independently confirm infection. ### Does urine protein mean kidney disease? No. Protein can occur temporarily or persistently for different reasons. Repeated or unexpected findings should be evaluated appropriately. ### Can a urine strip diagnose diabetes? No. Urine glucose and ketone findings do not independently diagnose diabetes. ### What is the difference between 2-parameter and 10-parameter urine strips? A 2-parameter strip focuses on a specific pair such as glucose + protein or glucose + ketones. A 10-parameter strip provides broader routine urine chemistry screening. ### Which 10-parameter urine strip does Microsidd sell? Microsidd offers [**Microsidd URS10T**](https://microsidd.com/products/microsidd-urs10t-complete-urinalysis-10-parameter-urine-test-strips) and also carries [**Mission 10U**](https://microsidd.com/products/mission-urine-strips-10u). ### Do I need an analyzer to read 10-parameter strips? Not necessarily. Many strips are designed for visual colour-chart interpretation. Analyzer use requires a specifically compatible reagent-strip system. ### Can the strip be reused? No. Urine reagent strips are intended for single use only. ## Medical Information Notice This article is intended for general educational and product-selection information only and is not a substitute for medical advice, diagnosis or treatment. Urine reagent strips are screening and monitoring aids. Results may be influenced by specimen collection, timing, storage, medication, diet, hydration, physiological factors and other clinical circumstances. An abnormal reagent-pad result does not automatically identify the underlying cause. Unexpected, persistent or clinically significant findings should be interpreted by an appropriately qualified healthcare professional and confirmed with additional laboratory or clinical investigations where necessary. Do not begin, stop or modify medication, insulin, diet or other medical treatment solely on the basis of a urine reagent-strip result. Always follow the Instructions for Use supplied with the exact reagent-strip product being used. --- > Source: [Microsidd India](https://microsidd.com/blogs/knowledge-hub/10-urine-test-strip-parameters-explained)