Peripheral Smear for Microfilaria: Booking, Price, and Results
About Peripheral Smear for Microfilaria: Booking, Price, and Results
| Field | Value |
|---|---|
| Also Known As | Microfilaria (MF) Blood Test, Filaria Blood Test, MF Smear, Thick and Thin Blood Smear for Parasites |
| Sample Type | Venous blood (whole blood in EDTA tube) |
| Fasting Required | No |
| Report Time | 3 to 4 working days |
| Recommended For | All ages and genders; especially individuals in filariasis-endemic areas or with suggestive symptoms |
| Price | Starting at ₹64 |
What Is a Peripheral Smear for Microfilaria?
A Peripheral Smear for Microfilaria is a microscopic blood test used to detect filarial larvae (microfilariae) in the bloodstream. Doctors prescribe it when a patient shows signs of filarial infection, particularly in regions where the disease is common. It is also called the Microfilaria (MF) Blood Test, Filaria Blood Test, or MF Smear. A small blood sample is collected from a vein and examined under a microscope to detect these parasites.
What Does a Peripheral Smear for Microfilaria Measure?
The Peripheral Blood Smear Examination for Microfilaria detects parasitic larvae in the blood. A trained laboratory professional examines a stained smear under a microscope for the following:
| Component | What It Tells You |
|---|---|
| Microfilariae presence | Whether filarial larvae are circulating in the blood |
| Species identification | Which filarial species is present (e.g., Wuchereria bancrofti, Brugia malayi, Loa loa, Mansonella species) |
| Eosinophilia | Whether white blood cells called eosinophils are elevated, which may indicate a parasitic infection |
Why Is a Peripheral Smear for Microfilaria Done?
A doctor may request this test when a patient presents with symptoms or has a history of travel to or residence in areas where filariasis is common in India.
Common Symptoms That May Require This Test
Several signs can prompt a doctor to order a Filaria Blood Test. These include:
- High fever with shaking chills and body aches
- Swelling of the legs, arms, breasts, or genitalia (lymphoedema)
- Swelling in the scrotal sac in men (hydrocele)
- Swollen or tender lymph nodes
- Persistent cough, wheezing, or shortness of breath
- Recurrent episodes of fever without a clear cause
Conditions This Test Can Help Detect
The blood smear for blood parasites can help identify several parasitic and related conditions:
- Lymphatic filariasis, commonly known as elephantiasis
- Lymphangitis (inflammation of the lymph vessels) and lymphadenitis (swollen lymph nodes)
- Tropical pulmonary eosinophilia, a lung condition linked to filarial infection
- Subcutaneous and serous cavity filariasis, depending on the species found
- Loiasis (Loa loa infection)
- Mansonellosis (Mansonella species infection)
How to Prepare and What to Expect
Preparation for this test is straightforward, but the timing of sample collection is especially important, setting this test apart from most routine blood tests.
Do You Need to Fast?
No fasting is required before a Peripheral Smear for Microfilaria. You can eat and drink as normal before your appointment.
Practical Tips Before Your Test
A few things to keep in mind before your sample is collected:
- Schedule your blood draw between 10 pm and 2 am, as most microfilariae species circulate in the blood only at night (nocturnal periodicity). Daytime collection may produce a false-negative result.
- If Loa loa infection is suspected, collection should instead be scheduled between 10 am and 2 pm, as this species is active during the day.
- Inform your doctor or phlebotomist about any recent travel to filariasis-endemic regions.
- If initial results come back negative but symptoms persist, your doctor may ask for repeat samples collected at 8- to 12-hour intervals over 2 to 3 days.
- Let the collection team know about any medications you are currently taking.
Step-by-Step Procedure
Here is what typically happens during sample collection:
- A phlebotomist cleans a small area on your arm with an antiseptic wipe.
- A small amount of blood is drawn from a vein using a fine needle into a special collection tube containing an anticoagulant.
- The blood is used to prepare a thick smear, which is then stained with Giemsa or haematoxylin and eosin dye to make any parasites visible under the microscope.
- A laboratory professional examines the smear under low magnification first, then at higher magnification to identify and classify any microfilariae present.
- If needed, a concentration technique (such as Knott's method) may be applied to improve the chances of detecting low levels of parasites.
- The sample is processed in a NABL-accredited laboratory, and your report is prepared within the stated turnaround time.
Factors That Can Affect Accuracy
The following can influence the reliability of your result:
- Collecting blood at the wrong time of day (not matching the species' periodicity)
- Fluctuating parasite levels in the blood across different days
- Early-stage infection, when parasite numbers are too low to detect
- Inadequate staining technique or microscope calibration at the testing facility
Understanding Your Peripheral Smear for Microfilaria Results
Results from this test should always be reviewed with your treating doctor, who will consider them alongside your symptoms, travel history, and other clinical findings.
| Parameter | Normal Result | Interpretation |
|---|---|---|
| Microfilaria | Not detected (Negative) | No evidence of active filarial infection at the time of testing |
A positive result means microfilariae were identified in your blood sample. This indicates an active filarial infection and requires further evaluation by your doctor.
"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."
Results During Special Conditions
Certain situations can affect how results are interpreted:
- In tropical pulmonary eosinophilia, microfilariae are typically absent from the peripheral blood despite an active filarial infection. A normal smear result does not rule out this condition.
- A negative result on a single smear does not exclude filariasis. Some individuals carry the infection without detectable larvae in the blood (a state called amicrofilaraemia). Repeat testing over several days is sometimes necessary.
- Eosinophilia (a raised eosinophil count) seen on the smear may be the only visible indicator of infection in some cases.
How to Maintain Healthy Levels
Since filarial infection is transmitted by mosquitoes, the best way to reduce your risk is to limit mosquito exposure:
- Use mosquito nets, repellents, and protective clothing, particularly at night and when visiting endemic areas.
- Filariasis requires repeated mosquito bites over time to establish an infection, so consistent protection during extended stays in endemic regions is worthwhile.
- If you live in an endemic area, ask your doctor about participation in available mass drug administration programmes.
Lupin Diagnostics Peripheral Smear for Microfilaria Price and Home Collection
The Peripheral Smear for Microfilaria starts at approximately ₹64, with home sample collection available across cities in India.
| City | Approximate Price (₹) |
|---|---|
| Mumbai | ₹160 |
| Bengaluru | ₹200 |
| Chennai | ₹250 |
| Kolkata | ₹160 |
| Hyderabad | ₹160 |
| Pune | ₹160 |
| Ahmednagar | ₹160 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
Booking your Peripheral Smear for Microfilaria near me is simple through Lupin Diagnostics:
- Select the test on the Lupin Diagnostics website.
- Choose your city and preferred time slot. Remember to select a nighttime slot (10 pm to 2 am) for accurate results.
- Opt for home sample collection by a certified phlebotomist, or visit your nearest Lupin Diagnostics centre.
- Receive your report via email or WhatsApp within 3 to 4 working days.
Home Collection
Lupin Diagnostics offers home sample collection for this test across multiple cities in India. All samples are processed in NABL-accredited laboratories by experienced technologists. Your digital report is shared directly via email or WhatsApp once ready.
Frequently Asked Questions
Most microfilariae species exhibit nocturnal periodicity, meaning they are present in peripheral blood only between 10 pm and 2 am. During the day, they remain in deeper tissues. Collecting blood during the day for a standard Filaria Blood Test can lead to a false-negative result, which is why timing is so critical for this particular test.
A negative result means no microfilariae were found in the blood sample at the time of testing. However, a single negative result does not completely rule out infection. If your symptoms persist, your doctor may recommend repeat blood draws at 8- to 12-hour intervals over 2 to 3 days.
No, this is a straightforward blood draw. You may feel a brief sting when the needle is inserted. Any minor soreness or bruising at the collection site usually fades within a few hours.
Results for the Peripheral Blood Smear Examination for Microfilaria are typically available within 3 to 4 working days after sample collection. You will receive your report digitally via email or WhatsApp.
Lymphatic filariasis is the underlying parasitic infection caused by filarial worms. Elephantiasis refers to the visible physical condition that can develop in later stages of the disease, characterised by painful swelling and thickening of the limbs, lymphoedema, and scrotal swelling in men. Not everyone with filariasis develops elephantiasis.
Filariasis is commonly found in Uttar Pradesh, Bihar, Odisha, Jharkhand, Gujarat, Andhra Pradesh, Tamil Nadu, and Kerala. It is particularly prevalent in coastal districts, with Wuchereria bancrofti responsible for nearly 98% of all cases in the country. If you live in or have recently visited these areas and have symptoms, ask your doctor about a Peripheral Smear for Microfilaria.
No fasting is needed. You can eat and drink normally before the blood draw. The most important preparation step is ensuring the sample is collected at the correct time of day for the suspected species.
Peripheral Smear for Microfilaria: Booking, Price, and Results
