Scrub Typhus IgM, Serum: Booking, Price, and Results
About Scrub Typhus IgM, Serum Test
| Field | Value |
|---|---|
| Also Known As | Scrub Typhus IgM Antibody Test, Tsutsugamushi IgM, Bush Typhus IgM, Orientia tsutsugamushi IgM, ST IgM ELISA |
| Sample Type | Serum (venous blood) |
| Fasting Required | No fasting required |
| Report Time | 3 days |
| Recommended For | All ages and genders, particularly those with fever and exposure to endemic areas |
| Price | Starting at ₹670 |
What Is a Scrub Typhus IgM Serum Test?
The Scrub typhus IgM serum test checks your blood for IgM antibodies, which are early immune response proteins produced when your body encounters the scrub typhus bacterium, Orientia tsutsugamushi. It is typically ordered for patients presenting with unexplained fever, especially after travel to rural or forested areas in Asia. Also known as the ST IgM ELISA, it uses a serum sample drawn from a vein in your arm.
What Does a Scrub Typhus IgM Serum Test Measure?
The test uses the EIA (Enzyme Immunoassay) method to detect specific antibodies in your serum. Here is what each marker indicates.
| Parameter | What It Tells Us |
|---|---|
| IgM Antibodies against Orientia tsutsugamushi | Indicates whether your immune system has recently responded to the scrub typhus bacterium |
| Early-stage infection markers | IgM antibodies appear shortly after infection, making this test useful for diagnosing an active or recent illness |
| Active vs past infection | IgM signals a current or recent infection; its presence helps distinguish active scrub typhus from past exposure |
Why Is a Scrub Typhus IgM Serum Test Done?
Doctors request this test when a patient shows signs of an acute febrile illness with a possible link to scrub typhus exposure. Here is a closer look at the situations that may call for it.
Common Symptoms That May Require This Test
The following symptoms, particularly when they appear together, are typical reasons a doctor may prescribe a Scrub typhus IgM test:
- Prolonged or high-grade fever with chills
- Severe headache and generalised body aches
- An eschar (a dark, scab-like lesion) at the site of a chigger bite
- Swollen lymph nodes
- Skin rash spreading across the body
- Confusion or altered mental state
- Fatigue that does not resolve with rest
Conditions This Test Can Help Detect
A Scrub typhus IgM serum test can help identify or raise suspicion for the following conditions:
- Scrub typhus, an acute febrile illness caused by the intracellular bacterium Orientia tsutsugamushi
- Hepatitis (liver inflammation) linked to scrub typhus infection
- Renal (kidney) complications arising from severe scrub typhus
- Meningoencephalitis, which refers to inflammation of the brain and its surrounding membranes
- Respiratory complications including acute respiratory distress syndrome (ARDS)
- Myocarditis, or inflammation of the heart muscle, in severe cases
How to Prepare and What to Expect
No special preparation is needed before this test, but there are a few steps that will help everything go smoothly.
Do You Need to Fast?
No, fasting is not required for the Scrub typhus IgM test. You can eat and drink normally before your appointment. If your doctor has ordered additional tests at the same time, check whether any of those require fasting.
Practical Tips Before Your Test
A few simple steps can help make your visit easier and ensure accurate results:
- Bring a detailed clinical history including your symptoms, previous test results, and travel or exposure history, as this is required for the test
- Inform your doctor or the phlebotomist about any medications you are currently taking
- Stay well hydrated before sample collection, as this makes the vein easier to locate
- Let the phlebotomist know if you have any bleeding disorders or clotting conditions
- Wear a short-sleeved or loose-fitting top for easy access to your arm
Step-by-Step Procedure
- A trained phlebotomist (blood collection specialist) ties an elastic band around your upper arm to make the vein more visible.
- The skin over the vein is cleaned with an antiseptic to reduce the risk of contamination.
- A fine needle is gently inserted into the vein, and around 3 ml of blood is drawn into a collection tube.
- The elastic band is removed, the needle is withdrawn, and a small cotton pad is placed over the site.
- The collected sample is labelled carefully and stored under refrigerated conditions (2 to 8°C) for transport to the laboratory.
- In the lab, the serum is separated from the blood and analysed using the EIA (enzyme immunoassay) method to detect IgM antibodies.
Factors That Can Affect Accuracy
Certain factors may influence the reliability of your Scrub typhus IgM serum test result:
- Testing too early (before 5 to 10 days after symptoms begin) may give a false negative result, as antibodies take time to develop
- IgM antibodies can remain elevated for up to 12 months after recovery, potentially indicating a past rather than active infection
- Cross-reactivity with other febrile illnesses such as dengue, malaria, leptospirosis, or enteric fever can affect accuracy
- Poor sample handling, haemolysis (breakdown of red blood cells), or incorrect storage temperature may affect test quality
- Pre-existing antibodies in people living in endemic areas can complicate interpretation
Understanding Your Scrub Typhus IgM, Serum Test Results
Results from this test are typically reported as reactive (positive) or non-reactive (negative). Always review your results with a doctor who can assess them alongside your symptoms and clinical history.
| Result | Typical Interpretation |
|---|---|
| Non-reactive (Negative) | No IgM antibodies detected; suggests no current or recent scrub typhus infection (if tested at the right time) |
| Reactive (Positive) | IgM antibodies detected; suggests an active or recent scrub typhus infection |
| Positive with no current symptoms | May reflect a past infection, as IgM can persist for up to 12 months |
| Negative with ongoing symptoms | Repeat testing may be advised if clinical suspicion remains high |
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
Cross-reactions can affect how results are interpreted in certain situations:
- In areas where scrub typhus is common, background antibody levels in the population can make positive results harder to interpret.
- IgM antibodies in this test may cross-react with antigens from dengue virus, Epstein-Barr virus, Leptospira, and varicella-zoster virus, among others. This can occasionally produce a positive result in patients who do not have scrub typhus.
- Non-specific binding has also been observed in patients with malaria, pulmonary tuberculosis, and leptospirosis.
How to Maintain Healthy Levels
Since scrub typhus is a preventable infection, these general precautions are worth following if you live in or travel to endemic regions:
- Avoid areas with dense scrub vegetation, tall grass, or brush where infected mites (chiggers) are typically found.
- Use insect repellents containing DEET on exposed skin and clothing when in rural or forested areas.
- Wear long-sleeved clothing and closed footwear to reduce skin exposure when walking through scrubland.
Lupin Diagnostics Scrub Typhus IgM, Serum Price and Home Collection
The Scrub typhus IgM serum test is available at Lupin Diagnostics starting at ₹670, with home sample collection offered across multiple cities. Prices may differ by location.
| City | Approximate Price (₹) |
|---|---|
| BHOPAL | 670 |
| CHENNAI | 670 |
| HYDERABAD | 670 |
| KOLKATA | 670 |
| NAVI MUMBAI | 670 |
| PUNE | 670 |
Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
- 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
Scrub typhus IgM test home collection is available across cities through Lupin Diagnostics. Your blood sample is collected at your doorstep by a trained phlebotomist and processed in a NABL-accredited laboratory. Digital reports are delivered to you via email or WhatsApp once ready.
Frequently Asked Questions
Scrub typhus is an acute infection caused by the bacterium Orientia tsutsugamushi. It spreads through the bite of infected larval mites, commonly called chiggers, found in scrubby vegetation, forests, and rural areas across Asia. The infection is not spread from person to person.
The test is best done after at least 5 to 10 days of symptoms, as IgM antibodies take time to reach detectable levels. If you have had a prolonged fever and were recently in a rural or forested area, speak to your doctor about the appropriate time to test.
The test involves a routine blood draw, which most people find only mildly uncomfortable. A small needle is inserted briefly into a vein in your arm. Any slight soreness at the site usually resolves within a few hours.
Yes, recovering from scrub typhus does not guarantee lifelong immunity. You can be reinfected on future exposure to infected mites, particularly if you return to endemic areas. Taking preventive precautions each time you visit such areas is important.
Doctors often order a complete blood count (CBC), liver function tests, kidney function tests, dengue serology, and a Widal test alongside the Scrub typhus IgM serum test to rule out other illnesses that cause similar symptoms, such as dengue, typhoid, and leptospirosis.
Studies have reported sensitivity of around 97 to 99% and specificity of around 96% for IgM-based tests. However, no test is perfect in isolation. A doctor will always interpret your result in the context of your symptoms, travel history, and other test findings before arriving at a diagnosis.
A positive result means IgM antibodies were detected in your blood. Contact your doctor promptly for a clinical assessment. Early medical attention helps prevent complications. Do not attempt to self-diagnose or self-treat based on the result alone.
Scrub Typhus IgM, Serum: Booking, Price, and Results
