What's the best treatment for rheumatic fever and for how long does the treatment last?

First treat strep. Rheumatic Fever is an autoimmune reaction to infection with group A streptococcus. Antibiotics are given to eradicate the strep and then lower doses taken to prevent reinfecttion. Generally NSAIDS and other antiinflammatories drugs are sufficient unless the heart is involved. If the heart is not involved most cases clear up with antiinflammatory treatment. Heart needs follow-up study.