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This 9-year-old boy was taken to the emergency department with a sore throat. On examination, he...

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Medical Sciences

This 9-year-old boy was taken to the emergency department with asore throat. On examination, he had redness of the throat andslightly swollen glands. The physician assistant ordered a throatculture and blood drawn for an antistreptolysin-O antibody (ASO).An antibiotic was prescribed for a 10-day period. His mother wastold to make an appointment with his pediatrician for a follow-up.At the follow-up visit 2 weeks later, the results of the laboratorytest revealed a throat culture with a few colonies ofβ-streptococci. The qualitative ASO test result was reported aspositive. The acute serum was frozen at the time of testing. Thepediatrician ordered a convalescent specimen to be testedsemiquantitatively in parallel with the acute specimen for an ASOtiter. The results of the parallel testing of the acute andconvalescent specimens revealed the following: • Acute specimenpositive, 1:1 dilution/titer (IU/mL 200) • Convalescent specimenpositive, 1:4 dilution/titer (IU/mL 800)

Thinking Group Discussion Questions

2. What does a rise in titer mean?

Answer & Explanation Solved by verified expert
3.8 Ratings (714 Votes)
2 Antistreptolysin antibody test is used to test for the presence of antibodies against group A streptococci in recent infection ASO test determines whether the antibody levels are increasing    See Answer
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