Acute Silicosis results from short-term exposure to very large amounts of silica. The lungs become very inflamed and may fill with fluid, causing severe shortness of breath and low blood oxygen levels. Acute silicosis follows massive exposure to dust in unregulated environments. A subset of acute silicosis is silicoproteinosis, the chest radiographic appearance of which mimics pulmonary alveolar proteinosis. Acute silicosis causes symptoms of severe dyspnea, cough, fever, and weight loss. Silicoproteinosis is often called acute silicosis), an alveolar lipoproteinosis which occurs after a very heavy exposure to small particles (less than 5-7 mm) of silica (quartz, cristobalite or tridymite). Initial changes consist of a diffuse haze in the lower lung fields. Later, ground-glass appearances, as well as coarse linear or rounded opacities are seen. A miliary picture with very small round opacities may also occur in the lower lung fields. The diagnosis of alveolar proteinosis may be readily made by the appearance of the bronchoalveolar fluid, which has a characteristic milky appearance. It is estimated that up to half the cases of alveolar proteinosis may be due to acute silicosis. An OSH glossary used in safety and health at work which is, adopted by ILO