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A cross-sectional study to assess prevalence of respiratory abnormality was conducted among 107 South African foundry workers. The prevalence of pneumoconiosis was 10.3% overall, increasing to 38% for workers with more than 15 years of service. Dyspnea was present in 38% of workers, chronic simple bronchitis in 15.9%, and asthmatic symptoms in 27%. Pneumoconiosis was not associated with higher prevalence rates of other respiratory abnormalities. The high overall prevalence of respiratory symptoms might be explained by exposure to environmental pollutants other than dust.
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