Silicosis Among Immigrant Engineered Stone (Quartz) Countertop Fabrication Workers in California

Key Points Question What are the characteristics of patients in California with silicosis from occupational exposure to dust from engineered stone (quartz), a popular material that is high in silica content and that is used to fabricate countertops? Findings In this case series of 52 patients, the median age was 45 years at diagnosis, and nearly all were Latino immigrant men. Diagnosis was delayed in 58%, with 38% presenting with advanced disease (progressive massive fibrosis), and 19% died. Meaning In California, silicosis associated with occupational exposure to dust from engineered stone primarily occurred among young Latino immigrant men; many patients presented with severe disease, and some cases were fatal.