If you follow a gluten-free diet you'll need to avoid autolyzed yeast extract because it's a source of hidden gluten, according to Colorado State University. Another possible concern about consuming autolyzed yeast extract is that it naturally contains monosodium glutamate.f you follow a gluten-free diet you'll need to avoid autolyzed yeast extract because it's a source of hidden gluten, according to Colorado State University. Another possible concern about consuming autolyzed yeast extract is that it naturally contains monosodium glutamate.
Test Result: A test sample is considered to contain ASO antibodies in excess of 200 IU/ml when agglutination (clumping) is observed when compared to the result of the negative control. The test principle, procedure and interpretation presented here are based on Latex Anti-Streptolysin O (ASO) test. The presence of Anti streptolysin O antibodies in serum can be indicated by seeing the ability of serum to neutralize the hemolytic activity of streptolysin O reagent (antigen).
One more point to keep in mind is that too many people are exposed to these bacteria without being symptomatic, thus the presence of ASO by itself does not indicate the disease, but a titer of more than 166 Todd units in general is considered a definite elevation and positive ASO test in adults.