Endotoxins in baled cottons and airborne dusts in textile mills in yhe People's Republic Of China.
Olenchock SA; Christiani DC; Mull JC; Ting-Ting Y; Pei-Lian L
Appl Environ Microbiol 1983 Oct; 46(4):817-820
The presence of endotoxins were determined in samples of airborne cotton dust and baled cotton collected from two textile mills. The cotton originated from different areas and countries of the world. Baled cotton samples were extracted in sterile nonpyrogenic water at room temperature for 60 minutes. Washings from the inside of unused plastic bags were used as controls. Air sample filters were wrapped individually dust face down in laboratory film. The filter and film were extracted separately using the procedure described above. All extracts were quantitated spectrophotometrically for bacterial endotoxin concentration. The wrapper and filter values were added and reported as single values. Grab samples from nine work areas of the mills were analyzed. Cotton from Morocco showed the lowest concentration of endotoxin at 8.1 nanograms per milligram (ng/mg) while samples from Shanghai and adjacent areas had the highest, at 6159.8ng/mg in two mills, mills 1 and 2. The range of airborne dust was 0.55 to 1.56 and from 0.55 to 1.54mg per cubic meter (m3) for mills 1 and 2, respectively. The average mean dust concentration from all work areas was similar in both mills, being about 1.07 and of the dust from the two mills differed being in the range of 165.7 to 492 and 4.3 to 163.2ng/mg, respectively. The overall mean concentration of endotoxins from each mill was about 322.3 and 90.3ng/mg in mills 1 and 2, respectively. There was a 3 fold difference in airborne concentration of endotoxins between the two mills. The carding and cleaning areas were the most contaminated. No endotoxins were detectable in the extracts of unused plastic bags and laboratory film. The authors conclude that the mill with the more concentrated baled cotton had greater concentration of endotoxins.
NIOSH-Author; Dust-exposure; Toxicology; Toxic-effects; Inhalants; Pollutants; Dust-inhalation; Analytical-methods; Exposure-levels; Respiratory-system-disorders
Stephen A. Olenchock, Division of Respiratory Disease Studies, National Institute for Occupational Safety and Health, Morgantown, West Virginia 265051
Applied and Environmental Microbiology