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🧪 What is Rubella IgM?

The Rubella IgM test detects Immunoglobulin M (IgM) antibodies against the Rubella virus in the blood.
IgM antibodies are produced early in infection, indicating recent or acute rubella infection.

❓ Why is the Test Done?

To:

Diagnose recent or acute rubella infection
Evaluate suspected rubella in pregnant women to assess risk of congenital infection
Investigate suspected rubella outbreaks
Differentiate between past immunity (IgG) and current infection (IgM)

📊 Normal Range / Interpretation

Rubella IgM Result	Interpretation
Negative	No recent infection; past exposure or immunity
Positive	Recent or acute rubella infection
Equivocal	Indeterminate; repeat testing recommended

📈 Clinical Significance

Result	Implication
Positive IgM	Active or recent rubella infection
Negative IgM	No current infection
False Positives	Possible due to cross-reactivity or nonspecific reactions

🧠 Associated Conditions

Condition	Details
Acute rubella infection	Fever, rash, lymphadenopathy
Congenital Rubella Syndrome	Risk if maternal infection during pregnancy
Rubella outbreaks	Public health concern

🔄 Related / Follow-Up Tests

Rubella IgG – to determine immunity status
PCR for Rubella virus – confirm active infection, especially in fetus or newborn
Prenatal screening and monitoring – in pregnant women exposed to rubella
Amniocentesis – to detect fetal infection if needed

✅ Fasting Required?

Test	Fasting Required
Rubella IgM	❌ No

📝 Summary Table

Parameter	Details
What	Detects IgM antibodies indicating recent rubella infection
Why	Diagnose acute infection, especially in pregnancy
Normal Result	Negative IgM indicates no recent infection
Positive Result	Recent or active rubella infection
Associated Conditions	Acute rubella, congenital rubella syndrome
Follow-up Tests	Rubella IgG, PCR, prenatal screening
Fasting Required	❌ No

Rubella - IgM

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