Quick answer
The Stool Hanging Drop Test costs ₹500 at Live Line Health Care. A quick microscope check of fresh, watery stool for the darting movement typical of Vibrio cholerae, giving an early clue to cholera. No fasting is needed. It uses a stool sample and the report is usually ready the same day.
Also known as: Hanging Drop Preparation, Stool for Hanging Drop, Hanging Drop for Vibrio, Cholera Test, Darting Motility Test, Vibrio Motility Test
What is the Stool Hanging Drop Test?
The Stool Hanging Drop test is a quick microscope test used when cholera is suspected. A drop of fresh liquid stool is suspended from a cover slip over a hollow slide, so that bacteria can swim freely and be watched alive. Vibrio cholerae, the bacterium behind cholera, has a single whip-like tail that makes it dart across the field very rapidly, a pattern often likened to shooting stars. Seeing this darting motility gives the doctor an early clue within a short time.
The test depends heavily on a fresh sample, because the bacteria slow down and die once stool cools or dries, and antibiotics can stop them moving too. It is a presumptive test. Some other bacteria also move quickly, so the finding is confirmed by a Stool Culture, which also shows antibiotic sensitivity. Unlike the Stool Routine test, which looks for parasites and pus cells in a fixed sample, this test watches live bacteria in watery stool. Above all, cholera is treated by replacing lost fluid quickly, and that should never wait for a lab report.
What it measures: Rapid darting movement of comma-shaped bacteria in fresh liquid stool, suggestive of Vibrio cholerae.
Parameters included (2)
- Darting Motility: Seen or Not Seen
- Comment on Vibrio-like Organisms
Why is this test done?
- Sudden, large amounts of watery diarrhoea, often without much stomach pain
- Rice-water stools, which look pale and cloudy
- Diarrhoea during a local cholera outbreak or after flooding
- Diarrhoea after drinking untreated water or eating contaminated seafood
- Several people from one area falling ill with watery diarrhoea at once
When should you get tested?
- Profuse watery stools that look like water in which rice was washed
- Vomiting along with watery diarrhoea
- Severe thirst and a dry mouth
- Leg cramps from salt loss
- Passing very little urine
How to prepare for the Stool Hanging Drop Test
- 1Bring the stool as fresh as possible. Ideally it should reach the lab within 1 to 2 hours, so check the timing with the centre before collecting.
- 2Collect liquid stool in the clean container provided, keeping urine, toilet water and disinfectant away from it.
- 3If possible give the sample before any antibiotic, unless a doctor has already started treatment. Do not take antibiotics on your own for diarrhoea.
- 4Keep drinking ORS throughout. Rehydration matters far more than the test.
Stool Hanging Drop Test normal range
| Parameter | Typical reference range |
|---|---|
| Expected result | Darting motility not seen |
| Darting motility seen | Organisms with rapid shooting-star movement, suggestive of Vibrio |
This test reports what is seen. A positive finding is presumptive and is usually confirmed by stool culture. Ranges are typical adult values and vary between labs, age and sex. Always use the range printed on your report and discuss results with your doctor.
Understanding your results
- Darting motility with typical symptoms strongly suggests cholera. Your doctor will focus on fluids and decide whether an antibiotic is needed.
- Not seen does not rule out cholera, especially if the sample was delayed or antibiotics were taken.
- Stool Culture confirms the germ, and its sensitivity report helps the doctor pick an antibiotic if one is needed.
- Cholera is a notifiable disease, so local health authorities may be informed to help control spread.
- Go to a hospital at once for sunken eyes, very little or no urine, dizziness, confusion, cold hands and feet, or inability to keep ORS down. Severe cholera can cause dangerous dehydration within hours.
Stool Hanging Drop Test – FAQs
What is the price of the Stool Hanging Drop Test?
The Stool Hanging Drop Test costs ₹500 at Live Line Health Care, at all 45 centres and for home sample collection.
What does darting motility mean in a stool test?
It means bacteria were seen shooting rapidly across the microscope field. This movement is typical of Vibrio cholerae, the cause of cholera. It is an early clue, and doctors usually confirm it with a stool culture.
Why must the stool sample for hanging drop be fresh?
The test watches live bacteria moving. Once stool sits for a while, cools or dries, the bacteria slow down and may stop moving altogether, making them impossible to recognise. A delayed sample can therefore give a falsely negative result.
Is the hanging drop test enough to confirm cholera?
Not on its own. Other bacteria can also move quickly, so the result is presumptive. A stool culture confirms Vibrio cholerae and shows which antibiotics work. Treatment with fluids does not wait for either test.
What are rice-water stools?
They are pale, watery stools with flecks of mucus, looking like water drained after washing rice. They are typical of cholera and can come in very large amounts. Anyone passing such stools needs ORS straight away and prompt medical care.
What should I do while waiting for the hanging drop result?
Keep sipping ORS in small, frequent amounts, and continue breastfeeding infants. Watch urine output closely. If vomiting stops you drinking, or you notice sunken eyes, drowsiness or no urine, go to a hospital without waiting for the report.
Where can I get the Stool Hanging Drop Test done?
At any of our 45 Live Line Health Care centres in 40 cities across Andhra Pradesh and Telangana, including Hyderabad, Visakhapatnam, Warangal, Kakinada and Nellore, or book home sample collection.
Medical disclaimer: This information is for general awareness only and is not a substitute for professional medical advice. Please consult a qualified doctor to interpret your results and before starting or changing any treatment.