Typhoid Test Report: Typhidot IgM vs IgG and Blood Culture (Video)

2:05 min

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Learn which typhoid test to order at each stage of a fever and how to read the results. We break down blood cultures, IgM/IgG strips, and later stool tests so you know what the numbers really mean. This quick guide also highlights the biggest mistake that can hide the infection and why you should see a doctor promptly. Remember, this is general information, not medical advice.

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Transcript

Was your fever test done too early?

Was your fever test done too early?

Typhoid Test Guide

We'll walk through which test to pick, what the results mean, and the key mistake to avoid.

Test Timing by Fever Day

Early in the illness, days one to seven, a blood culture catches the bacteria while antibodies are still low. Around day four to ten, Typhidot IgM starts to rise, giving a rough hint. After the second week, antibodies dominate and stool cultures become useful.

Culture Sensitivity Time

A blood culture needs two to five days to show growth, and a 48-hour report only tells you if nothing has grown yet. When bacteria appear, the lab reports sensitivity as S for susceptible, I for intermediate, and R for resistant, guiding antibiotic choice.

Reading IgM/IgG Card

If the strip shows IgM positive and IgG negative, it points to a recent infection but still needs confirmation. Both lines positive could mean a current or very recent case. IgG alone usually reflects an old exposure.

A common reason cultures turn up empty is early antibiotic use. As the post says: 'The antibiotic you bought on day two is the reason your culture may come back empty.'

The one mistake to avoid

The biggest pitfall is taking antibiotics before the culture, it can mask the bacteria and give a false negative, so always get the blood draw before any meds.

Later tests

From the second week onward, the bacteria may appear in stool, so a stool culture helps identify carriers, especially food handlers. Bone-marrow culture is the most sensitive but is done only in hospitals. Urine culture has a small role and isn’t routine.

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Read the full guide

Read the complete guide on thecareonline.com. This is general information, not medical advice.

Nothing on The Care Online is medical advice. Traditional practices are described as tradition, not as fact. Take a persistent or serious concern to a qualified professional. See how videos and posts are made on our methodology page.