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METALWORKING FLUID EXPOSURES CAN CAUSE SARCOIDOSIS-LIKE ILLNESS IN METAL MACHINING INDUSTRIES. Metal parts are commonly flooded with synthetic and semi-synthetic oils that serve as coolants during machining. Such fluids are commonly recycled and can become contaminated with mycobacteria, endotoxin, and microbial antigens. Workers often develop hypersensitivity pneumonitis that is initially mistaken for sarcoidosis.
