Typhidot, Salmonella IgG Test
About Typhidot, Salmonella IgG Test
| Field | Value |
|---|---|
| Also Known As | Typhidot Test, Salmonella typhi IgG/IgM Antibody Test, Typhidot Rapid Test, Enteric Fever Antibody Test |
| Sample Type | Serum |
| Fasting Required | No fasting required |
| Report Time | 1 Day |
| Recommended For | All ages and genders; especially those with suspected typhoid symptoms or recent travel to endemic areas |
| Price | Starting at ₹480 |
What is a Typhidot, Salmonella IgG Test?
The Typhidot, Salmonella IgG test is a rapid blood test that detects antibodies produced by your body in response to Salmonella typhi, the bacteria that causes typhoid fever. It identifies two types of antibodies — IgM and IgG — to determine whether you have a current, recent, or past infection. Doctors typically order this test when a patient presents with prolonged fever and other typhoid-like symptoms. A small serum sample is drawn from a vein in the arm for testing.
What Does a Typhidot, Salmonella IgG Test Measure?
The Typhidot Salmonella IgG test works by detecting specific antibodies that your immune system produces against the outer membrane protein of Salmonella typhi. Two antibody types are checked, each with a different significance.
| Antibody | What it Indicates |
|---|---|
| IgM Antibodies | First antibodies produced by the body; appear within the first week of illness and suggest a recent or active infection |
| IgG Antibodies | Develop later in the course of infection; can persist for months or even years, indicating past exposure or recovery |
Together, the pattern of IgM and IgG results helps your doctor understand the stage of infection.
Why is a Typhidot, Salmonella IgG Test Done?
Your doctor may request the Typhidot Salmonella IgG test for several reasons, including evaluating symptoms of fever that do not resolve quickly or investigating possible exposure to typhoid.
Common Symptoms That May Require This Test
The following symptoms are among those that may prompt a doctor to order this test.
- High or persistent fever
- Stomach pain or discomfort
- Generalised weakness and fatigue
- Headache and muscle aches
- Loss of appetite
- Constipation or diarrhoea
Conditions This Test Can Help Detect
This test can help identify a range of conditions related to Salmonella typhi exposure.
- Typhoid fever caused by Salmonella typhi bacteria
- Acute typhoid infection, detected through the presence of IgM antibodies
- Past or resolved typhoid infection, identified by IgG antibodies alone
- Chronic carrier status, where a person continues to harbour the bacteria after apparent recovery
- Differentiation of typhoid fever from other febrile illnesses, such as malaria or dengue
How to Prepare and What to Expect
No special preparation is needed before a Typhidot, Salmonella IgG test. The process is straightforward and similar to any routine blood draw.
Do You Need to Fast?
No fasting is required before this test. You can eat and drink normally on the day of your sample collection.
Practical Tips Before Your Test
A few simple steps will help ensure your visit goes smoothly.
- Bring a detailed clinical history, including your symptoms, previous test results, and family history, as this is required for the test
- Inform your doctor about all medications and supplements you are currently taking, as some may affect antibody levels
- Stay well hydrated before the visit, as this makes blood collection easier
- Let your doctor know if you have recently travelled to typhoid-endemic areas
- Mention if you have received a typhoid vaccination recently, as this can influence IgG results
Step-by-Step Procedure
Here is what you can expect during sample collection.
- A trained phlebotomist will clean a small area on the inside of your arm with an antiseptic solution.
- A soft elastic band is wrapped around your upper arm to help locate a suitable vein.
- A fine needle is gently inserted into the vein, and a small blood sample (approximately 3 ml) is collected into a gel tube.
- The needle is removed, and light pressure is applied to the site to stop any minor bleeding.
- A small bandage or cotton pad may be placed over the site; most people feel no discomfort after this point.
- The sealed sample is labelled and sent to the laboratory, where it is stored refrigerated until testing.
Factors That Can Affect Accuracy
Several factors can influence the reliability of your test result.
- Testing too early (within the first 48 hours of symptoms) before antibodies have developed adequately
- Starting antibiotic treatment before the test, which can suppress the antibody response and cause false negatives
- Cross-reactivity with other infections, such as dengue fever or other viral illnesses
- Prior typhoid vaccination, which can cause a positive IgG result without active infection
- Improper sample storage or handling
Understanding Your Typhidot, Salmonella IgG Test Results
Your doctor will review your results alongside your symptoms, travel history, and other clinical details. The table below outlines how different antibody patterns are generally interpreted.
| Result Pattern | Interpretation |
|---|---|
| IgM Negative, IgG Negative | No current or past typhoid infection detected |
| IgM Positive, IgG Negative | Recent or acute infection (early phase) |
| IgM Positive, IgG Positive | Active infection (middle phase of illness) |
| IgM Negative, IgG Positive | Past infection, recovery, or prior vaccination |
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.
Results During Special Conditions
Certain situations can cause misleading results and are worth discussing with your doctor.
- Dengue fever and other viral illnesses have been shown to cause cross-reactivity with the IgM component of this test, leading to false-positive results. If you have recently had dengue or another viral infection, your doctor may order confirmatory tests such as a blood culture.
- In areas where typhoid is very common, elevated IgG levels are frequently found in the general population due to past exposure. This can make interpreting an IgG-positive result more difficult in those settings.
How to Maintain Healthy Levels
Preventing typhoid infection in the first place is the best approach.
- Drink only clean, treated water and follow good food hygiene, including thorough hand-washing before meals
- Avoid street food or unpeeled fruits and raw vegetables when in areas with poor sanitation
- Consider typhoid vaccination before travelling to endemic regions, as recommended by your doctor
Lupin Diagnostics Typhidot, Salmonella IgG Test Price and Home Collection
The Typhidot, Salmonella IgG test is available at Lupin Diagnostics starting at ₹480, with home sample collection available across multiple cities.
| City | Approximate Price (₹) |
|---|---|
| BHOPAL | 480 |
| CHENNAI | 480 |
| HYDERABAD | 480 |
| KOLKATA | 480 |
| NAVI MUMBAI | 480 |
| PUNE | 480 |
Disclaimer: Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
Booking your Typhidot Salmonella IgG test online is simple.
- 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
The Typhidot, Salmonella IgG test home collection service is available across major cities in India. All samples are processed in NABL-accredited Lupin Diagnostics laboratories to ensure quality. Your digital report is delivered directly to you via email or WhatsApp, making the process convenient from start to finish.
Frequently Asked Questions
The Typhidot Salmonella IgG test is a rapid serological test used to detect antibodies against Salmonella typhi, the bacteria responsible for typhoid fever. By identifying both IgM and IgG antibodies, it helps doctors determine whether you have a current, recent, or past infection. It is also used to distinguish typhoid from other fever-causing illnesses like dengue or malaria.
The test is best performed at least 3 days after fever onset. Antibodies typically begin to appear within 2 to 3 days of infection, so testing too early may produce a false-negative result. If your symptoms persist but the first result is negative, your doctor may suggest repeat testing.
No, fasting is not required. You can eat and drink as normal before the test.
A positive IgM result suggests that your immune system is actively responding to Salmonella typhi, pointing to a recent or ongoing infection. Your doctor will review this result along with your symptoms before advising any further steps.
Yes, false-positive results can occur. Cross-reactivity with dengue fever and certain other viral infections has been documented. If there is clinical doubt, your doctor may recommend a blood culture or other confirmatory tests.
The Typhidot test generally provides faster results (within hours) and is considered more specific in many clinical settings compared to the Widal test, which can take longer and is prone to higher rates of false-positive results. Your doctor will decide which test is appropriate based on your clinical situation.
A negative result suggests that IgM and IgG antibodies were not detected at the time of testing. However, this does not completely exclude typhoid, particularly if the test is done very early in the illness. If your symptoms continue, your doctor may recommend repeat testing or a blood culture for a more definitive answer.
Typhidot, Salmonella IgG Test
