An elevated titer of antibody (positive ASO) or an ASO titer that is rising means that it is likely that the person tested has had a recent strep infection. ASO titers that are initially high and then decline suggest that an infection has occurred and may be resolving.

What does a positive Antistreptolysin o mean?

An elevated titer of antibody (positive ASO) or an ASO titer that is rising means that it is likely that the person tested has had a recent strep infection. ASO titers that are initially high and then decline suggest that an infection has occurred and may be resolving.

What is ASO titre normal range?

Generally, an ASO test value below 200 is considered normal. In children under the age of 5, the test value should be less than 100. Results will vary by laboratory. If your results show that you have an elevated ASO value, you may have a post-streptococcal complication.

What is the treatment of ASO positive?

Increased levels of ASO titre in the blood could cause damage to the heart and joints. In most cases, penicillin is used to treat patients with increased levels of ASO titre.

What is an antistreptolysin O test used to detect?

Antistreptolysin O (ASO) titer is a blood test to measure antibodies against streptolysin O, a substance produced by group A streptococcus bacteria. Antibodies are proteins our bodies produce when they detect harmful substances, such as bacteria.

How long does ASO titer stay elevated?

Antistreptolysin-O Titer Antibodies are produced approximately a week to a month after the initial strep infection. ASO levels peak at approximately 4 to 6 weeks after the illness and then taper off but may remain at detectible levels for several months after the strep infection has resolved.

What causes elevated Antistreptolysin?

ASO antibodies will remain detectable in your blood for several months after an infection. If you have elevated levels of ASO antibodies, it means that you have probably had a recent strep infection. If your levels are taken again later and are higher, it also means you’ve probably had a recent strep infection.

What is streptococcal infection?

Streptococcal infections are any type of infection caused by the group of bacteria Streptococcus. There are many different types of Streptococci and infections vary in severity from mild throat infections to pneumonia.

How is ASO produced in the body?

Anti-streptolysin O (ASO) is the main antibody produced by the body in response to a group A beta-hemolytic streptococcal infection (strep A). This bacteria is responsible for many throat infections and usually responds well to antibiotic treatment.

What is Sydenham chorea?

Sydenham chorea mainly involves jerky, uncontrollable and purposeless movements of the hands, arms, shoulder, face, legs, and trunk. These movements look like twitches, and disappear during sleep. Other symptoms may include: Changes in handwriting. Loss of fine motor control, especially of the fingers and hands.

Is antistreptolysin O contagious?

It’s not contagious. Doctors believe it’s your body’s immune response to a previous strep or scarlet fever infection. Rheumatic fever is a serious condition that can affect your heart, joints, brain, and skin.

Is Antistreptolysin contagious?

What is antistreptolysin O titer?

Antistreptolysin O (ASO) titer is a blood test to measure antibodies against streptolysin O, a substance produced by group A streptococcus bacteria. Antibodies are proteins our bodies produce when they detect harmful substances, such as bacteria.

What does a rise in antistreptolysin O titre indicate?

A rise in antistreptolysin O titre (ASOT) is indicative of preceding GAS infection. In clinical practice, often only a single ASOT measurement is available and its timing in relation to a possible GAS infection is unknown. Interpretation of the result in this context is liable to misdiagnosis.

What is a high antistreptolysin O Level?

Antistreptolysin O antibodies will be raised after infection with streptococci. Levels greater than 200 units per millilitre are considered significant (although cut off levels will vary between laboratory undertaking the test). Measurement can be useful diagnostically if recent infection with streptococci is known to be important in aetiology.

What is the role of antistreptolysin O in the pathogenesis of gas?

The bacteria produce a range of extracellular antigens, including streptolysin O, which induce an antibody response in the host. A rise in antistreptolysin O titre (ASOT) is indicative of preceding GAS infection.