Question

A 7-year-old boy presents with fever, migratory polyarthritis, a new pansystolic murmur at the apex and a history of sore throat two weeks ago. Which investigation is most useful to support the diagnosis of acute rheumatic fever?

Accepted Answer

ASO titre and other evidence of preceding streptococcal infection

Answer

ANA titre

Answer

Rheumatoid factor

Answer

HLA-B27 typing

Answer

Serum uric acid

Practice question

A 7-year-old boy presents with fever, migratory polyarthritis, a new pansystolic murmur at the apex and a history of sore throat two weeks ago. Which investigation is most useful to support the diagnosis of acute rheumatic fever?