🔍 What is the Leptospira IgG Antibody Test?
The Leptospira IgG Antibody Test detects IgG antibodies in the blood, which develop after an infection with Leptospira bacteria. Unlike IgM, which appears early in infection, IgG antibodies indicate past exposure, chronic infection, or long-term immunity to leptospirosis—a bacterial disease transmitted through contaminated water, soil, or animal urine.
🎯 Purpose of the Test
Confirm past leptospirosis infection
Assess long-term immune response to Leptospira bacteria
Differentiate current (IgM) vs. past (IgG) infection
Monitor chronic or recurrent leptospirosis cases
📊 Normal Ranges & Result Interpretation (May vary by lab method)
✅ Negative: No IgG antibodies detected → No past exposure or immunity
⚠️ Equivocal/Borderline: Retesting may be required for confirmation
🔺 Positive: IgG antibodies present → Suggests past or chronic leptospirosis infection
⚠️ Conditions Associated with Positive IgG Results
Past leptospirosis infection (resolved or latent)
Long-term immunity after exposure
Possible chronic or recurrent leptospirosis
📝 Additional Testing May Include:
Leptospira IgM Antibody Test (to check for recent infection)
PCR Test (to detect active bacteria in blood/urine)
Liver & Kidney Function Tests (to assess organ impact)
👩‍⚕️ When Should You Get Tested?
History of leptospirosis exposure (contaminated water, animals, flood areas)
Ongoing or recurrent symptoms of leptospirosis
Need for immune status assessment (previous infection confirmation)
Persistent kidney/liver issues with no clear cause