Acute- and convalescent-phase serum specimens were collected from 50 patients with group A streptococcal pharyngitis. The anti-streptolysin O (ASO) titer for each serum specimen was determined by using both the standard neutralization assay and the latex agglutination (LA) test (Rheumagen ASO; Biokit Inc., New Britain, Conn.). When the ASO titers derived by the two methods were compared, the co...

A prospective study was conducted to investigate the rate of group A streptococci (GAS) carriers and associated anti-streptolysin O (ASO) titers in serum samples in asymptomatic school children in spring in Duzce, Turkey. Pharyngeal swabs were obtained to detect the presence of GAS and blood samples were collected to determine elevated ASO titers in serum. A total of 351 asymptomatic primary sc...

OBJECTIVE: To determine ASO titer profile by establishing ARF differential diagnoses of other diseases with high levels of ASO antibodies. METHODS: We investigated 78 patients with ARF at onset and follow-up, 22 with isolated chorea at onset, 45 with recurrent oropharyngeal tonsillitis, and 23 with recent flare of juvenile idiopathic arthritis. We tested ASO with automated particle-enhanced imm...

Antistreptolysin O (ASO) titers were determined on 117 human sera with rabbit, human, and sheep red blood cells (RBC) as the indicator system in the ASO tube test. The titers of 65% of the sera were one dilution step higher when a 5% suspension of sheep RBC was used instead of a 5% suspension of rabbit RBC. Titers were one dilution step higher in 42.7% of the sera when a 5% suspension of human ...

Infection or postinfectious phenomena have been postulated to play a role in the pathogenesis of children afflicted with the typical symptoms of Tourette's syndrome (TS). We investigated whether an increase of titers of antistreptococcal antibodies can be reproduced in our children with TS, and whether this increase is restricted to children. We examined the titers of two different antistreptoc...

This study investigated the prevalent ASO titer values and serogroups of BHS prevalent in the throat of apparently healthy children in Calabar with the aim of detecting the risk in the children of developing RF and RHD in their later years. The throats of 437 children drawn randomly from elementary schools in three communities in Calabar, Nigeria were examined and throat swabs collected. Fifty ...

The streptozyme test was compared with the antistreptolysin O (ASO), antideoxyribonuclease B (ADN-B), and antihyaluronidase (AH) tests. One hundred and twenty-seven human serum specimens were tested by each of the four tests. The streptozyme test detected more specimens with elevated titers than any single test; however, it was not as effective as the combination of the ASO and ADN-B tests. The...

Group A streptococcal (GAS) serology is used for the diagnosis of post-streptococcal diseases, such as acute rheumatic fever, and occasionally for the diagnosis of streptococcal pharyngitis. Experts recommend that the upper limits of normal for streptococcal serology be determined for individual populations because of differences in the epidemiology of GAS between populations. Therefore, we per...

In order to find the correlation between the severity of carditis in acute rheumatic fever (ARF) and the erythrocyte sedimentation rate (ESR), C-reactive protein (CRP) and anti-streptolysin O (ASO) titers, we performed a retrospective study in Shiraz on one-hundred and four patients. The mean age of the patients was 11 years. Fever was seen in 85.5%, arthralgia in 95.2%, arthritis in 81.7%, car...

in order to find the correlation between the severity of carditis in acute rheumatic fever (arf) and the erythrocyte sedimentation rate (esr), c-reactive protein (crp) and anti-streptolysin o (aso) titers, we performed a retrospective study in shiraz on one-hundred and four patients. the mean age of the patients was 11 years. fever was seen in 85.5%, arthralgia in 95.2%, arthritis in 81.7%, car...