ASO Titre in Madurai
Also called: ASO titer, ASLO, Strep A antibody test
Report
{context.blood_test.parameters} Parameters
The test at a glance
What it checks
Report delivery
Test for
Age group
Commonly advised for
What is a ASO Titre ?
Understanding The Antistreptolysin O (ASO) Titre
The Antistreptolysin O (ASO) Titre is a blood test used to detect a recent infection by Group A Streptococcus bacteria. Unlike a throat culture, which diagnoses an active strep throat infection while it is happening, the ASO Titre looks for the aftermath. It measures antibodies the body produces against "Streptolysin O," a toxic enzyme released by the bacteria. This test is primarily ordered when a patient presents with symptoms of complications that occur weeks after a strep infection—specifically Rheumatic Fever (which affects the heart and joints) or Post-Streptococcal Glomerulonephritis (a kidney disease). It is a vital tool for connecting current unexplained symptoms (like joint pain or kidney issues) to a past, perhaps untreated, strep infection.
Components Measured:
The test focuses on a specific immune marker:
Antistreptolysin O Antibodies: These are proteins created by the immune system to neutralize the toxins produced by Group A Strep bacteria.
Titre Level: The test measures the amount (titre) of these antibodies in the blood. A higher number indicates a stronger immune response, suggesting a recent or severe infection. The antibodies typically appear 1 to 3 weeks after the initial infection, peak around 3 to 5 weeks, and then gradually decline over months.
Preparation:
Preparation for an ASO Titre is simple and generally requires no special changes to your routine.
Fasting: Fasting is usually not required. You can eat and drink normally before the test.
Medications: Inform your doctor about any medications you are taking, particularly corticosteroids or antibiotics, as these can suppress the immune system and potentially lower antibody levels, leading to a false-negative result.
Recent Illness: Let the doctor know if you have had a sore throat or skin infection in the last few months, even if it seemed mild.
Procedure:
The test is a standard venous blood draw that takes only a few minutes:
A healthcare professional selects a vein, typically in the inner elbow.
The area is cleaned with an antiseptic to prevent infection.
An elastic band (tourniquet) is tied around the arm to swell the veins with blood.
A needle is inserted, and a small amount of blood is collected into a tube.
The needle is removed, and a cotton ball or bandage is applied to the site.
The sample is sent to a laboratory where it is tested for the reaction between your serum and the streptolysin antigen.
Risks:
The risks associated with an ASO Titre test are minimal:
Bruising: Minor bruising at the needle site is common but harmless.
Pain: A slight pinch during needle insertion and mild soreness afterward.
Infection: Extremely rare risk of infection at the puncture site.
Fainting: Some patients may feel lightheaded during the blood draw.
Normal Ranges:
Results are measured in International Units per milliliter (IU/mL). Reference ranges can vary slightly between laboratories, but general guidelines are:
Adults: A test is usually considered negative (normal) if the level is below 200 IU/mL.
Children (School-aged): Because children are exposed to strep bacteria more frequently, their "normal" baseline is higher. A level below 400 IU/mL is often considered normal for children (especially ages 5–15).
Infants/Toddlers: Levels are typically very low, similar to adults, as they have had less exposure.
Interpretation:
A doctor interprets ASO results in conjunction with physical symptoms. A single test result is often not enough to confirm a diagnosis; doctors look for patterns.
Negative (Low) Titre: Indicates you likely have not had a strep infection recently. However, if symptoms are strong, the doctor may repeat the test in 10 days to see if levels rise (seroconversion).
Elevated or Rising Titre: This is clinically significant.
Rheumatic Fever: High ASO combined with joint swelling, fever, or heart murmurs suggests Rheumatic Fever.
Glomerulonephritis: High ASO combined with blood in urine, swelling (edema), or high blood pressure suggests post-streptococcal kidney inflammation.
False Positives/Negatives: ASO levels might not rise if the infection was on the skin (impetigo) rather than the throat, or if antibiotics were taken early. Conversely, levels can remain elevated for months after an infection has cleared, so a high number doesn't always mean the disease is currently active—it just means it was there.
Who should take this test
The ASO Titre checks for a past throat infection with a streptococcus germ. It is advised if:
- You have joint pain and swelling after a sore throat
- You have long-standing fever with joint symptoms
- Your doctor suspects rheumatic fever
- There is a known heart valve problem under review
- A child has repeated sore throats with joint pain
ASO Titre testing in Madurai
Tapadia Diagnostic Centre in Madurai offers NABL-accredited ASO Titre test from a Blood sample(s). ASO titer, ASLO, Strep A antibody test is also prescribed for Fever, joint pain, chest pain, swelling, shortness of breath. Established in 1989, this doctor-led diagnostic centre ensures high accuracy. Home sample collection and walk-in facility available at our Madurai center. Pay at the centre with no advance payment. Book online or visit us.
Frequently asked questions
Related Pathology Tests in Madurai
Centers You Can Choose To Visit
ASO Titre in Madurai
Rated 4.6 on Google
From 6,477 patient reviews across our Hyderabad centres.
Every report, kept for you
Past reports stay in your account and can be downloaded again.
NABL accredited
Every result reviewed by a qualified pathologist before it reaches you.
Four decades of practice
A family-run diagnostic centre, trusted by doctors and households since 1989
Medically Reviewed by Qualified Biochemists
ASO Titre in Other Cities
Master Health Checkup (Blood) in Madurai
HIV 1 & 2 Antibodies, Serum-Elisa Method in Madurai
Dengue IgG, IgM Antibodies + NS1 Antigen-Rapid, Serum in Madurai
Lipoprotein A (Lp A), Serum in Madurai
Erythrocyte Sedimentation Rate (ESR) in Madurai
Thyroxine Total (T4), Serum in Madurai
Triiodothyronine Total (T3), Serum in Madurai
CA 19.9 (Pancreatic Cancer Marker), Serum in Madurai
NIPT with Microdeletions in Madurai
NIPT Basic in Madurai
Complete Blood Picture (CBP) in Madurai
Serum Phosphorus Test in Madurai
TIBC in Madurai
Urology Profile in Madurai
Beta HCG Free, Serum (Pregnancy Test) in Madurai
Viral Screening in Madurai
AFP Test in Madurai
Microalbuminuria test in Madurai
Diabetes Testing (FBS + PLBS) in Madurai
Antithrombin III in Madurai
D-dimer test in Madurai
Creatine Kinase (CK) Test in Madurai
AST Test in Madurai
Cardiac Markers in Madurai
Pap Smear - LBC in Madurai
DVT Profile in Madurai
Bleeding Time and Clotting Time (BT & CT) in Madurai
Estradiol Test in Madurai
hs-CRP Test in Madurai
Alkaline Phosphatase (ALP) Test in Madurai
Fertility Profile in Madurai
Albumin blood test in Madurai
Troponin T in Madurai
Infertility Profile Extended in Madurai
Electrolyte Panel in Madurai
Anticardiolipin Antibodies (IgG) in Madurai
PSA Test in Madurai
FSH Test in Madurai
STD Panel in Madurai
PCOS Profile in Madurai
Serum Iron Test in Madurai
Cardiac Profile-III in Madurai
Plasma Fibrinogen Test in Madurai
HBsAg Test in Madurai
Cardiac Biomarker Test in Madurai
Herpes Simplex Virus (HSV) Types 1 and 2 Antibody Test in Madurai
Antenatal Profile in Madurai
Activated Partial Thromboplastin Time in Madurai
Lipid Panel in Madurai
Fine Needle Aspiration Cytology in Madurai
CRP test in Madurai
Joint Pain / SLE / Collagen Profile-I in Madurai
PAPP-A Test in Madurai
Insulin Test in Madurai
Triple Screen Test in Madurai
Anti-HCV Test in Madurai
Basic Metabolic Panel (BMP) in Madurai
Very low-density lipoprotein (VLDL) test in Madurai
Free Testosterone in Madurai
Triglycerides Test in Madurai
Quad Screen in Madurai
Folic Acid in Madurai
Urinalysis in Madurai
CEA Test in Madurai
Ferritin Test in Madurai
Transferrin Saturation% in Madurai
Protein C Antigen in Madurai
Alpha Feto Protein (AFP) - Fluid in Madurai
CPK (MB) Test in Madurai
Lupus Anticoagulant Testing in Madurai
Reticulocyte Count in Madurai
Infertility Profile-Basic in Madurai
Beta hCG Test in Madurai
DIABETIC PROFILE in Madurai
LH Test in Madurai
Anti-Müllerian Hormone (AMH) Test in Madurai
Bile Salts and Bile Pigments, Urine in Madurai
HbA1c in Madurai
Vitamin D (1,25-Dihydroxyvitamin D) in Madurai
Liver Function Test (LFT) in Madurai
Anemia Profile Basic in Madurai
Rheumatoid Factor in Madurai
Widal Test in Madurai
Bilirubin blood test in Madurai
Inhibin A, Tumor Marker, Serum in Madurai
Thyroid Function Tests in Madurai
eGFR in Madurai
Menopause Profile in Madurai
EXTENDED DIABETIC PROFILE in Madurai
LDH Test in Madurai
Total Cholesterol Test in Madurai
Random Blood Sugar Test in Madurai
Total Protein Test in Madurai
RPR test in Madurai
Anti-dsDNA Test in Madurai
HDL Cholesterol in Madurai
Blood Type Test in Madurai
ASO Titre in Madurai
Blood Urea(Serum) Test in Madurai
Postprandial Blood Sugar Test in Madurai
Back Pain Profile in Madurai
ANA test in Madurai
Serum Creatinine Test in Madurai
PT/INR Test in Madurai
Fasting Blood Sugar Test in Madurai
Extended Anemia Profile III Executive in Madurai
Kidney Function Test (Renal Profile) in Madurai
Serum Magnesium Test in Madurai
Well-woman exam in Madurai
LDL cholesterol test in Madurai
Prolactin Test in Madurai
Malaria Blood Smear in Madurai
Liver Function Test (+GGT) in Madurai
TPHA Test in Madurai
Hepatitis B Surface Antigen (HBsAg) Test in Madurai
Antenatal Profile 2 in Madurai
TSH Test in Madurai
Cardiac Catheterization in Madurai
Cardiolipin Antibody (IgM) in Madurai
Master Health Checkup (BL+RADIO) in Madurai
Calcium Profile in Madurai
Coagulation Profile in Madurai
Uric Acid Test in Madurai
Vitamin D (25 - Hydroxy Vitamin D, Serum) in Madurai
Globulin Test in Madurai
Fever Profile Test in Madurai
Connective Tissue Disease Profile in Madurai
Calcium Blood Test in Madurai
IHC in Madurai
Estriol Unconjugated (E3) Test in Madurai
Blood Typing in Madurai
Vitamin B12 Test in Madurai
Serum Cortisol in Madurai
Double Marker Test in Madurai
Pap Smear, Conventional in Madurai
Protein S Activity in Madurai
Non-Invasive Prenatal Testing (NIPT) in Madurai
whole exome sequencing in Madurai
Newborn Screening (NBS) in Madurai
Apolipoprotein A1 (Apo A1), Serum in Madurai
Apolipoprotein B (Apo B), Serum in Madurai
Renal Function Test (RFT) in Madurai
