Abstract：
BACKGROUND:Exposure to silica dust is considered to be one of etiological factors of antineutrophil cytoplasmic antibodies (ANCA) -associated vasculitis (AAV). METHODS:Subjects exposed to silica dust in Central Bohemia and followed in the Department of Occupational Medicine, Charles University, were selected for study. A group of 86 men exposed to SiO2 for at least 5 years were examined. The association between occupational exposure to silica dust and ANCA positivity is analyzed. RESULTS:The subjects had a mean age of 66.7 years, and mean exposure to silica of 22.3 years. ANCA were detected significantly more frequently in patients group (17.1%; P-ANCA 18x, C-ANCA 3x) than in controls (n = 28, mean age 64.2 years, P-ANCA 1x, i.e., 3.6%). ANCA positivity was found less frequently (7.1%) in the group with history of SiO2 exposure without signs of pronounced silicosis, than in the group with simple (30.3%) or complicated silicosis (36.0%). Odds ratio for ANCA positivity and relative risk estimate in patients with silicosis were highly significant. Among possible predictor factors for ANCA positivity, silicosis and tuberculosis were relevant. No typical AAV was present among the patients. CONCLUSION:Long-term silica exposure may be one of the exogenous factors contributing to ANCA production, however, silica exposure alone, without typical silicosis, was not associated with ANCA positivity.
journal_name
Am J Ind Medjournal_title
American journal of industrial medicineauthors
Bartůnková J,Pelclová D,Fenclová Z,Sedivá A,Lebedová J,Tesar V,Hladíková M,Klusácková Pdoi
10.1002/ajim.20327subject
Has Abstractpub_date
2006-07-01 00:00:00pages
569-76issue
7eissn
0271-3586issn
1097-0274journal_volume
49pub_type
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