Endotoxins in airborne dusts from cottons of different varieties or areas of growth.
Olenchock-SA; Castellan-RM; Sasser-P; Cocke-JB
Cotton dust: proceedings of the Ninth Cotton Dust Research Conference, beltwide cotton research conferences, January 9-11, 1985, New Orleans, Louisiana. Wakelyn PJ, Jacobs RR, eds. Memphis, TN: The National Cotton Council of America; 1985 Jan; :138-141
The endotoxin content of different cotton varieties grown in widely separated geographic areas was investigated. Three varieties of cotton, DPL61, GSA71 and SJ5 were grown side by side in California, west Texas, and Mississippi. The cottons were carded and vertical elutriated dust samples were analyzed for dust weight and gram negative bacterial endotoxin content. Forced expiratory volume in one second (FEV1) was measured in 25 human volunteers exposed for 6 hours to the cotton dusts produced by carding. Exposure concentrations for California DPL61 and GSA71 were 0.36 milligram/cubic meter (mg/m3) and 0.38mg/m3, respectively, and were lower than concentrations for the same varieties from Texas, 0.46 and 0.48mg/m3, respectively, and from Mississippi, 0.48 and concentration was slightly lower than for samples from Texas and California. Endotoxin concentrations were significantly lower for California samples of all varieties. For example, for DPL61, California endotoxin concentrations were 28.82 nanograms (ng)/m3, Texas concentrations were 70.56ng/m3, and Mississippi concentrations were 135.35ng/m3. Only for SJ5 was the Mississippi endotoxin concentration slightly lower than that from Texas. For all exposures, except for one Mississippi sample, the alteration in FEV1 from before cotton exposure to after was related to the endotoxin concentration of the sample. For example, for three California samples of DPL61, GSA71, and SJ5, with endotoxin concentrations of 77.82, 142.75, and 271.85ng/m3, the respective alterations in FEV1 were minus 3.2, minus 6.4, and minus 7.0 percent. The authors conclude that geographic area has a marked effect on the endotoxin contamination of the carded cotton dust regardless of the variety grown. Acute pulmonary function changes correlate well with elutriated endotoxin contents in the cotton dusts.
Quantitative-analysis; Dust-analysis; Industrial-dusts; Airborne-particles; Air-contamination; Occupational-exposure; Employee-exposure; Exposure-levels; Air-quality-measurement; Occupational-respiratory-disease; Research
Cotton dust: proceedings of the Ninth Cotton Dust Research Conference, beltwide cotton research conferences, January 9-11, 1985, New Orleans, Louisiana