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Botanical trash and gram-negative bacterial contents of materials utilized by the cotton industry.

Morey P; Rylander R
Cotton Dust: Controlling an Occupational Health Hazard ACS Symp Ser 1982; :245-257
The amounts of plant derived trash and Gram negative bacteria in materials utilized by the cotton industry were discussed. Cotton materials were collected from gins and textile mills, United States Department of Agriculture Agricultural Marketing Services classing offices (raw cotton), oil mills, and waste recyclers. All materials were analyzed for nonfibrous botanical particles more than 50 micrometers in size. Gram negative bacteria (GNB) were analyzed by plating and counting colony forming units. Endotoxin determinations were made using the Limulus amoebocyte lysate assay. Results showed that on average 1 to 2x10(6) per gram (g) GNB was found in the seed cotton. Raw cottons used in the textile industry contained about 5x10(6) GNB/g. Soft cotton mill wastes processed by recyclers were characterized by large amounts of leaflike trash containing GNB levels of about 1x10(6)/g. The levels of airborne endotoxin were significantly lower in gins, oil mills and waste recyclers, than in textile cardrooms. Washing removed most of the GNB from botanical trash as well as from lint. The authors conclude that GNB levels are higher in gross botanical trash than in cleaned lint or linters, but that removal of all gross trash does not completely eliminate GNB from lint.
NIOSH-Author; Airborne-dusts; Cotton-dust; Cotton-mill-workers; Immunological-tests; Workplace-studies; Bioassays; Plant-dusts
Publication Date
Document Type
Conference/Symposia Proceedings
Montalvo JG Jr.
Fiscal Year
Source Name
Cotton Dust: Controlling an Occupational Health Hazard
Page last reviewed: September 22, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division