Respected doctor, my wife is suffering from joint pain for past some months. today we have taken a lab test. it shows RH FACTOR NEGATIVE,,URIC ACID 5.6 ASO ..POSITIVE could you please let me know what is ASO, does she need any surgery ? is it very harmful? expecting your valuable consult .thanking you sir

Summarized question: What does negative rheumatoid factor regarding joint pain indicate?