The Typhidot IgM test is a serological test used to detect IgM antibodies against Salmonella typhi, the bacteria responsible for typhoid fever. It helps in the early diagnosis of typhoid infection, usually within 2–3 days after the onset of symptoms.
Doctors order the Typhidot IgM test to:
✅ Diagnose acute typhoid fever, especially in the early stages.
✅ Differentiate typhoid from other febrile illnesses like malaria or dengue.
✅ Confirm active infection rather than past exposure.
| Result | Interpretation |
|---|---|
| Negative (-) | No recent typhoid infection detected. |
| Positive (+) | Indicates active or recent infection with Salmonella typhi. |
| Equivocal | Unclear result; may require repeat testing or a Widal test. |
✔️ Early Detection – Detects typhoid earlier than the Widal test.
✔️ Rapid & Specific – Provides results within a few hours.
✔️ Better Accuracy – Less chance of cross-reactivity compared to the Widal test.
⚠ False Positives: Other infections may sometimes cause IgM antibodies.
⚠ False Negatives: Early infections (before antibody production) may not be detected.
⚠ Confirmation Needed: In some cases, blood culture or a Widal test is done to confirm the diagnosis.
📌 Blood Culture – Gold standard for typhoid confirmation.
📌 Widal Test – Used in some cases but has lower specificity.
📌 Antibiotic Treatment – A doctor may start antibiotics based on symptoms and test results.