Chyluria test (urine)
Quick answer: This test checks urine for chyle, a milky, fat-rich fluid from the lymph system that can leak into the urine. It is ordered when urine looks milky; in India, past filarial infection is a common cause.
- SampleUrine
- TakesA few minutes to give the sample
- Before the testNo special preparation is usually needed unless your doctor advises otherwise.
How the test is done
- 1You collect urine in a clean container, sometimes after a meal if your doctor asks
- 2The lab notes whether the urine looks milky
- 3A fat test, such as mixing with ether or a fat stain, checks for chyle
- 4The sample may also be checked for microfilariae
What your results can mean
Reading your report
Results are usually reported as positive or negative; your doctor will look for the cause if chyle is found.
If the result is outside the usual range
Chyle in urine can be seen when lymph channels leak into the urinary tract, most often from filarial infection in India, and less often after injury, surgery or with tumours. A negative result means no chyle was found in that sample.
Who usually has this test
People who notice milky or cloudy white urine, especially in areas where filaria is common.
Risks and aftercare
There are no risks; note whether the milky urine comes and goes, as this helps your doctor.
Names and options
Also called: chyle in urine, milky urine test
Listed by the hospital as
- CHYLURIA, URINE
Questions about this test
What causes milky urine?
Milky urine can be due to chyle from the lymph system, pus from infection, or crystals. This test helps tell chyle apart from these other causes.
Is chyluria linked to filaria?
In India, filarial infection is the most common cause, as the worms damage lymph channels. Your doctor may order a blood test for microfilariae as well.
Does chyluria come and go?
Yes, it often comes and goes and can be worse after fatty meals. A sample that is clear on one day does not always rule it out.
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This page explains each test in general terms so you know what to expect. It is not medical advice: your doctor decides which tests you need and what your results mean. Reference ranges differ between laboratories. Updated 4 November 2026.