Abstract
The 4 antibody titers were significantly elevated in patients with active rheumatic fever, and patients convalescent from a hemolytic streptococcal infection. The agglutination titer (with autoclaved hemolytic streptococci) was high while the titers of the other 3 tests were low in patients with rheumatoid arthritis. All the 4 titers were low in patients with non-rheumatoid forms of arthritis.

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