<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">A lot of workers in industries such as foundry, stonecutting, and sandblasting are exposed to higher than permissible levels of crystalline silica. Various alterations in humoral immune function have been reported in silicosis patients and workers exposed to silica dust. The aim of this study was to measure antinuclear antibody (ANA) and rheumatoid factor (RF) levels in foundry workers exposed to silica and to compare them with a control group without such exposure. ANA and RF were measured in 78 exposed and 73 non-exposed workers, and standard statistical methods were used to compare them. The two groups did not significantly differ in age and smoking. Mean work duration of the exposed and non-exposed workers was (14.9±4.72) years and (12.41±6.3) years, respectively. Ten exposed workers had silicosis. ANA was negative in all workers in either group. Its mean titer did not differ significantly between the exposed and control workers [(0.39±0.15) IU mL-1 vs. (0.36±0.17) IU mL-1, respectively]. RF was positive in two workers of each group. Other studies have reported an increase in ANA and RF associated with exposure to silica dust and silicosis.In contrast, our study suggests that exposure to silica dust does not increase the level of ANA and RF in exposed workers.</abstract>

A lot of workers in industries such as foundry, stonecutting, and sandblasting are exposed to higher than permissible levels of crystalline silica. Various alterations in humoral immune function have been reported in silicosis patients and workers exposed to silica dust. The aim of this study was to measure antinuclear antibody (ANA) and rheumatoid factor (RF) levels in foundry workers exposed to silica and to compare them with a control group without such exposure. ANA and RF were measured in 78 exposed and 73 non-exposed workers, and standard statistical methods were used to compare them. The two groups did not significantly differ in age and smoking. Mean work duration of the exposed and non-exposed workers was (14.9±4.72) years and (12.41±6.3) years, respectively. Ten exposed workers had silicosis. ANA was negative in all workers in either group. Its mean titer did not differ significantly between the exposed and control workers [(0.39±0.15) IU mL-1 vs. (0.36±0.17) IU mL-1, respectively]. RF was positive in two workers of each group. Other studies have reported an increase in ANA and RF associated with exposure to silica dust and silicosis.In contrast, our study suggests that exposure to silica dust does not increase the level of ANA and RF in exposed workers.

Antinuclear Antibody and Rheumatoid Factor in Silica-Exposed Workers

Department of Occupational Medicine, Tehran University of Medical Sciences, Tehran, Iran

Archives of Industrial Hygiene and Toxicology

{"article-title":"Antinuclear Antibody and Rheumatoid Factor in Silica-Exposed Workers"}

A lot of workers in industries such as foundry, stonecutting, and sandblasting are exposed to higher than permissible levels of crystalline silica. Various...

Antinuclear Antibody and Rheumatoid Factor in Silica-Exposed Workers

Published Online: Jul 06, 2009

Page range: 185 - 190

DOI: https://doi.org/10.2478/10004-1254-60-2009-1892

Keywords
autoimmune changes, foundry workers, humoral alterations, rheumatoid diseases, silicosis

This content is open access.

Antinuclear Antibody and Rheumatoid Factor in Silica-Exposed Workers

Published Online: Jul 06, 2009

Page range: 185 - 190

DOI: https://doi.org/10.2478/10004-1254-60-2009-1892

Keywordsautoimmune changes, foundry workers, humoral alterations, rheumatoid diseases, silicosis

This content is open access.

Keywords
autoimmune changes, foundry workers, humoral alterations, rheumatoid diseases, silicosis