Typhi Dot IgM
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Detects IgM antibodies against Salmonella Typhi, the bacterium responsible for typhoid fever
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🧪 What is Typhi Dot IgM?
The Typhi Dot IgM test is a rapid serological assay that detects IgM antibodies against Salmonella Typhi, the causative agent of typhoid fever. The presence of IgM antibodies typically indicates a recent or acute infection.
❓ Why is the Test Done?
To:
- Diagnose acute or recent typhoid fever
- Support clinical diagnosis when blood cultures are negative or unavailable
- Guide timely treatment decisions in febrile patients with suspected typhoid
📊 Normal Range / Interpretation
Result | Interpretation |
|---|---|
Negative | No detectable IgM antibodies; no recent infection |
Positive | Presence of IgM antibodies indicating recent or acute infection |
📈 Interpretation of Results
Result | Clinical Significance |
|---|---|
Positive IgM | Suggests recent or acute typhoid infection |
Negative IgM | No recent infection; past infection not ruled out |
🧠 Associated Conditions
Condition | Details |
|---|---|
Acute typhoid fever | Febrile illness caused by Salmonella Typhi |
Other Salmonella infections | May rarely cross-react in some cases |
🔄 Related / Follow-Up Tests
- Typhi Dot IgG – indicates past infection or immunity
- Blood culture – gold standard for diagnosis
- Widal test – traditional serological test
- PCR for Salmonella DNA – molecular diagnosis
✅ Fasting Required?
Test | Fasting Required |
|---|---|
Typhi Dot IgM | ❌ No |
📝 Summary Table
Parameter | Details |
|---|---|
What | Detects IgM antibodies against Salmonella Typhi |
Why | Diagnose recent or acute typhoid infection |
Normal Result | Negative; no recent infection |
Positive Result | Indicates acute or recent typhoid fever |
Associated Conditions | Typhoid fever, acute Salmonella infection |
Follow-up Tests | Typhi Dot IgG, blood culture, Widal test |
Fasting Required | ❌ No |
How our test process works!
