Abstract
We studied the Thymol Turbidity test (TTT) and Zinc Sulfate Turbidity test (ZTT) in the serum of 83 patients with rheumatoid arthritis (RA). TTT or ZTT was high in 63 of 83 patients (75.9%) with RA. All patients were divided into two groups, according to high or low values for serum CRP, erythrocyte sedimentation reaction and Lansbury index. TTT and ZTT from the high group were higher compared to the low group. 21 or 27 patients. whose TTT or ZTT was not high, had a positive rheumatoid factor test. However TTT or ZTT were high in 7 patients, whose rheumatoid factors were negative. Most of these cases had high RA activity. It was suggested that TTT and ZTT are useful indices for RA activity although less significant compared to rheumatoid factor.
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