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Appl Microbiol. 1970 January; 19(1): 60–61.
PMCID: PMC376609

Comparison of Antistreptolysin O Latex Screening Test with the Antistreptolysin O Hemolytic Test


This report describes a comparison of the Behringwerke antistreptolysin O (ASO) latex screening test with the ASO hemolytic test. Agreement between the two tests was poor when Difco streptolysin O (SLO) reagent was employed in the hemolytic test; approximately 34% of the sera with ASO titers in the normal range of the hemolytic test gave false-positive latex test reactions. However, the percentage of false-positive latex test reactions was only 5% when Behringwerke SLO reagent was used in the hemolytic test. An assay of the Difco and Behringwerke SLO reagents against an ASO standard indicated that the Difco SLO reagent was more potent than the Behringwerke SLO reagent. The lack of agreement between the Behringwerke latex test and the hemolytic test using Difco SLO reagent is attributed to the potency of the SLO reagents.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.
  • Klein GC, Moody MD, Baker CN, Addison BV. Micro antistreptolysin O test. Appl Microbiol. 1968 Jan;16(1):184–184. [PMC free article] [PubMed]
  • Mathies H, Gaedicke H. Die Latex-ASL-Reaktion zur groben Differenzierung normaler und pathologischer Antistreptolysintiter. Med Klin. 1968 Feb 2;63(5):165–167. [PubMed]

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