Also found in: Encyclopedia.


(an'tē-strep-tol'i-sin), Avoid the mispronunciation antistreptoly'sin.
An antibody that inhibits or prevents the effects of streptolysin O elaborated by group A streptococci; the amount of antistreptolysin in the serum is frequently increased during and after streptococcal disease, and comparative titers may aid a diagnosis and prognosis.


(an″tī-strep-tŏ-lī′sĭn) [ anti- + streptolysin]
An antibody that opposes the action of streptolysin.

antistreptolysin O

Abbreviation: ASLO
An antibody against streptolysin O that is used retrospectively to diagnose infections with group A beta-hemolytic streptococci.
References in periodicals archive ?
She also tested negative for antistreptolysin O (ASO) and had a normal erythrocyte sedimentation rate (ESR) and normal levels of C-reactive protein (CRP)
9]/L) Alanine aminotransferase (U/L) C-reactive protein (mg/L) Ferritin ([micro]g/L) Creatine kinase (U/L) 38 Blood culture Negative Antinuclear antibody, rheumatoid Negative factor Antistreptolysin Negative Day 16 Day 23 Haemoglobin (g/dL) 12.
35-165), immunoglobulin A (IgA) 119 mg/dL (N:1-250), antistreptolysin O antibody 438 IU/mL (normal <200 IU/mL), and finally the absolute eosinophil count was 300/mm[sup.
Additional consultations revealed a negative tuberculin skin test, antistreptolysin O, hepatitis panel, nuclear antibody panel, ferritin, rheumatoid factor, histoplasma and coccidiodies antibody titers.
All patients were subjected to a baseline workup consisting of complete hemogram serum- creatinine levels liver function tests chest X-ray urine (routine and microscopic) examination besides antistreptolysin O titer antinuclear antibody assay rheumatoid factor assay antineutrophilic cytoplasmic antibodies and hepatitis B and C.
In addition to this antistreptolysin O and anti-DNase B titres were elevated.
Other markers, such as amylase, antistreptolysin O, cholesterol, IgA, IgM, and transferrin, demonstrated the opposite pattern; that is, values were very low in the neonatal period and increased after 14 days.
Kim SK, Kang HY Kim YC, Lee ES: Clinical comparison of psoriasis in Korean adults and children: correlation with serum antistreptolysin O titers.
We diagnosed guttate psoriasis in this patient based on her history and physical exam, a throat culture that was positive for group A beta-hemolytic streptococci, and blood work that showed an elevated antistreptolysin O titer.
Similarly, the supplement-only group showed the greatest improvement in the inflammatory blood markers C-reactive protein and antistreptolysin O (ASO).
Beginning on December 20, 2007, all patients with newly diagnosed EN were recommended to undergo acute sera testing, erythrocyte sedimentation rate (ESR) testing, chest radiograph, tuberculin skin test (TST), and testing for group A streptococcus (GAS) infection (via antistreptolysin O titer [ASO] and throat swab for GAS rapid antigen detection test [RADT]).