Hanging Drop Preparation, Stool: Booking, Price, and Results
About Hanging Drop Preparation, Stool
| Field | Value |
|---|---|
| Also Known As | Hanging Drop Test, Stool Hanging Drop Test, Dark Illumination Stool Test, V. cholerae Stool Test |
| Sample Type | Fresh stool sample |
| Fasting Required | No fasting required |
| Report Time | 1 Day |
| Recommended For | All ages and genders; especially during suspected cholera outbreaks or acute gastrointestinal infections |
| Price | Starting at ₹400 |
What Is a Hanging Drop Preparation, Stool?
The Hanging Drop Preparation, Stool test is a microscopy technique used to observe live micro-organisms in a fresh stool sample. It checks whether bacteria or parasites in the sample are capable of independent movement (motility), which helps identify specific pathogens.
Doctors typically order this test when a patient presents with sudden, severe watery diarrhea or suspected cholera. It is also known as the Hanging Drop test or the Stool Hanging Drop test.
What Does a Hanging Drop Preparation, Stool Measure?
This test examines your stool sample under a microscope to detect micro-organisms and assess how they move. Below are the key things it looks for:
| What Is Observed | Why It Matters |
|---|---|
| Bacterial motility | Determines whether organisms in the sample can move, helping to identify specific pathogens |
| Darting or "shooting star" movement | A distinctive pattern linked to Vibrio cholerae, the bacterium that causes cholera |
| Protozoan trophozoites | Detects active (live) forms of parasites such as Giardia lamblia and Entamoeba histolytica |
Why Is a Hanging Drop Preparation, Stool Done?
This test is requested when a patient has symptoms pointing to a possible bacterial or parasitic gut infection. Here is a closer look at when and why it may be prescribed.
Common Symptoms That May Require This Test
The following symptoms often prompt a doctor to request this test:
- Sudden, profuse watery diarrhea
- Signs of dehydration such as dry mouth, dizziness, or reduced urination
- Abdominal cramping or pain
- Nausea and vomiting
- Recent exposure to contaminated water or food
- Symptoms appearing after travel to regions where cholera is common
Conditions This Test Can Help Detect
This test can help identify several acute gut infections, including the following:
- Cholera (infection caused by Vibrio cholerae)
- Diarrheas and purulent enterocolitis (inflammation of the small intestine and colon)
- Giardia lamblia infection (a common intestinal parasite)
- Entamoeba histolytica infection (a parasite that can cause amoebic dysentery)
- Other bacterial gut infections, including those caused by Salmonella, Bacillus cereus, and Escherichia coli
How to Prepare and What to Expect
No special preparation is needed for the Hanging Drop Preparation test. However, a few practical steps can help ensure your sample is collected correctly and gives accurate results.
Do You Need to Fast?
No fasting is required before this test. You can eat and drink normally beforehand. Your doctor may give additional instructions depending on other tests being ordered at the same time.
Practical Tips Before Your Test
Follow these steps to make sure your sample is suitable for testing:
- Collect the stool sample during the active phase of diarrhea, when symptoms are at their worst, for the best chance of detecting motile organisms.
- Use a clean, sterile, leak-proof container with a screw-top lid. Do not use paper, a matchbox, or any absorbent material.
- Avoid contaminating the sample with urine or water, as this can affect results.
- Label the container with your full name, age, gender, and the date and time of collection.
- Inform your doctor of any medicines you are currently taking. Tetracyclines, anti-protozoal drugs, sulphonamides, laxatives, antacids, and magnesium hydroxide may affect results and may need to be paused before the test.
- Brief a detailed clinical history including your symptoms, previous test results, and relevant exposure history, as this is required for the test.
Step-by-Step Procedure
Here is what happens from sample collection through to laboratory analysis:
- Collect a fresh stool sample in a sterile, leak-proof container. A small portion of about 5 grams is enough.
- Transport the sample to the laboratory as quickly as possible, ideally within 30 minutes of collection. Motile micro-organisms lose their activity rapidly at room temperature.
- At the laboratory, a trained technologist places a small drop of the stool sample in saline (salt water) on a glass coverslip.
- The coverslip is inverted over the hollow well of a specialised depression slide. The drop hangs from the coverslip, and petroleum jelly is used to seal the edges to prevent the drop from drying out.
- The slide is placed under a microscope and examined immediately for any signs of movement in the micro-organisms.
- The technologist notes whether any movement observed is true motility (directed, purposeful movement) or simply Brownian motion (random jiggling caused by water molecules), and records the findings.
Factors That Can Affect Accuracy
- Delayed sample delivery: liquid samples should be examined within 30 minutes, and soft samples within one hour
- Contamination of the sample with urine or tap water
- Certain medications, including some antibiotics and anti-protozoal drugs
- Incorrect storage or overheating of the sample during transport
Understanding Your Hanging Drop Preparation, Stool Results
Your result will typically be reported as positive or negative, based on what the laboratory observes under the microscope. The table below explains what each finding generally means.
| Parameter | Normal (Negative) Result | Positive Finding |
|---|---|---|
| Motile organisms | Not detected | Motile organisms present |
| Characteristic darting motility | Not observed | Darting movement seen; may indicate V. cholerae |
A negative result means the laboratory did not detect any motile micro-organisms. This may suggest that cholera or a motile pathogen is not the cause of symptoms, though further tests may still be needed.
A positive result means motile organisms were detected. The type of movement observed helps the laboratory identify the likely pathogen.
Disclaimer: These ranges are general guidelines. Your doctor will interpret your results based on your age, health history, and other factors. Always consult a qualified healthcare professional for personalised medical advice.
How to Prevent Gastrointestinal Infections
While a negative result is reassuring, good habits can help prevent gastrointestinal infections in the future:
- Drink only clean, boiled, or filtered water. Be especially cautious when travelling
- Wash hands thoroughly with soap before meals and after using the toilet
- Ensure food, especially seafood, is properly cooked before eating
Lupin Diagnostics Hanging Drop Preparation, Stool Price and Home Collection
The Hanging Drop Preparation, Stool test is priced at ₹400 at Lupin Diagnostics, and home sample collection is available across cities. The city-wise price breakdown is listed below.
| City | Approximate Price (₹) |
|---|---|
| BHOPAL | 130 |
| CHENNAI | 250 |
| HYDERABAD | 225 |
| KOLKATA | 200 |
| NAVI MUMBAI | 400 |
| PUNE | 400 |
Disclaimer: Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
Booking your Hanging Drop Preparation test with Lupin Diagnostics is straightforward:
- Select the test on the Lupin Diagnostics website
- Choose your city and preferred time slot
- Opt for home sample collection by a certified phlebotomist, or visit your nearest Lupin Diagnostics centre
- Receive your report via email or WhatsApp within the stipulated turnaround time
Home Collection
Lupin Diagnostics offers home sample collection for the Stool Hanging Drop Test across multiple cities. Because the sample must reach the laboratory within 30 minutes for accurate results, please coordinate with the collection team to ensure swift transport. All samples are processed in NABL-accredited laboratories, and your digital report is accessible online once ready.
Frequently Asked Questions
This test is used to detect motile bacteria and parasites in a fresh stool sample. It is most commonly ordered when cholera or a similar acute gut infection is suspected. It can also identify parasites like Giardia lamblia and Entamoeba histolytica based on their movement patterns.
For the most accurate result, liquid stool samples should reach the laboratory within 30 minutes of collection. Soft samples should be delivered within one hour. Motile organisms lose their activity quickly outside the body, which can affect the result.
No fasting is needed. You can eat and drink normally before the test. Your doctor will advise you if any specific preparation is required alongside other tests being ordered.
Research suggests the test has a sensitivity of approximately 85.8% and a specificity of 81.7% for detecting Vibrio cholerae. While it is a useful rapid screening tool, bacterial culture remains the gold standard for confirming a cholera diagnosis.
Yes. In addition to identifying bacteria such as Vibrio cholerae, the Hanging Drop Preparation test can also detect motile protozoan parasites, including Giardia lamblia and Entamoeba histolytica, based on their characteristic movement under the microscope.
A positive result indicates that motile micro-organisms were detected in the sample. This points to an active infection. Your doctor will review the findings alongside your symptoms and clinical history, and may recommend further confirmatory tests and appropriate treatment.
Yes, home collection is available. However, because the sample must be examined while fresh, it is important to ensure rapid transport to the laboratory after collection. Please inform the collection team about this requirement when booking.
Hanging Drop Preparation, Stool: Booking, Price, and Results
