Microbiology
| Full details for "Anti-streptolysin O titre". | |
|---|---|
Name |
Anti-streptolysin O titre |
Alternative name/Profile |
ASOT / glomerulonephritis / rheumatic fever / bacterial endocarditis / scarlet fever |
Department |
Microbiology |
Investigation |
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Specimen type |
Peripheral blood |
Sample type |
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Sample container & volume |
6 ml clotted Red top serum tube |
Frequency of analysis |
Daily |
Turnaround time |
1 working day, once received by the referral laboratory |
Availability |
Daily |
Notes |
Please provide clinical details. Requests for ASOT testing are not processed without relevant clinical details. Detection of Anti - Streptolysin O ( ASO) in human serum may aid in the diagnosis of streptococcal infections. In these infections promoted by acute streptococcal infections, anti streptolysin O antibodies are produced due to the presence of the streptolysin O antigen liberated by the bacteria. Information on the extent and degree of infection can be obtained from the measurement of serum ASO levels. Increased ASO levels are also associated with rheumatic fever and glomerulonephritis
Send sample to the laboratory without delay. Samples must be frozen within 4 hours of being taken
Samples are referred to Eurofins Biomnis for processing.
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Related links |
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Reference range |
Low levels of antibody tend to persist in the serum of healthy individuals and the generally accepted upper limit of normal is 200 IU/ml. However, ASO levels rise rapidly following reinfection and the demonstration of rapidly increasing antibody titres is of diagnostic significance. 200 IU/ml is regarded internationally as the upper limit of the normal range but values may vary with age, sex and geographical location. Elevated levels of ASO titres have also been found in healthy carriers. |
Last updated |
Wed, 14 Oct 2026 15:53:07 IST |