Abstract
Summary
1) When bentonite particles of a selected size are “sensitized” by human gamma globulin (Fraction II) and then mixed with serum from patients with rheumatoid arthritis, they flocculate. This reaction was observed in 78% of adult patients with definite rheumatoid arthritis, in 2% of control patients, and in none of a group of normal subjects. Sera tested by the SSEA test and the BFT showed agreement in 98%. 2) Procedures for doing the BFT are described. The test is simple and rapid. The sera to be tested are not absorbed or fractionated.
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