Abstract
Serum specimens from 144 workers exposed to asbestos cement dust were examined for the presence of ANA, RF, immunoglobulins, and IC. These immunologic findings were compared with chest radiographic changes. A high percentage of workers had polyclonal hypergammaglobulinemia, and there was a statistically significant association between elevated levels of IgC and IgM and radiographic classification. Although a significant number of workers had an increased prevalence of ANA and elevated levels of IC, there was no correlation between these parameters and chest radiographs. These findings support B cell hyperactivity in workers exposed to asbestos and suggest that autoantibody production and IC are not directly involved in disease pathogenesis.
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